Page 1
Factory Workshop Manual
Ford
Explorer 2wd
V6-245 4.0L (1994)
Anonymous
1st January 2018
Make
Model
Engine and year
This manual was submitted by
Date
Page 2
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 111 - 120, ( 112 113 114
115 116 117 118 119 ) > System Information > System Diagnosis
Page 3
Code 111 - 120: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
No DTCs OUTPUT OR DTCs NOT LISTED
KOEO self-test .....................................................................................................................................
............................................................... QA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/QA - No Codes/Codes Not Listed/QA1 - Check
VREF Voltage At Self-Test Connector
KOEO self-test .....................................................................................................................................
............................................................... QA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/QA - No Codes/Codes Not Listed/QA1 - Check
VREF Voltage At Self-Test Connector
DTC 111
System Pass.
DTC 112
Intake Air Temperature sensor circuit below minimum voltage, 254 degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA20 - Induce DTC 118 or 113
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 113
Intake air temperature sensor circuit above maximum voltage/ -4O degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA10 - Induce DTC 117 or 112
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 114
Intake air temperature higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
Page 4
KOER Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
DTC 116
Engine coolant temperature higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
DTC 117
Engine coolant temperature sensor circuit below minimum voltage 254 degrees F indicated.
Page 5
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 111 - 120, ( 112 113 114
115 116 117 118 119 ) > System Information > System Diagnosis > Page 7
Page 6
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA20 - Induce DTC 118 or 113
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 118
Engine coolant temperature sensor circuit above maximum voltage/ -40 degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA10 - Induce DTC 117 or 112
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 121
Closed throttle voltage higher or lower than expected. Indicates throttle position voltage
inconsistent with the mass air flow sensor.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DH2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH2 - Check
For Stuck Throttle Plate
KOER Hard Code ................................................................................................................................
.................................................... Go to DH1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH1 - Check for
Other DTCs
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G1 - Check for Idle Air DTCs: Initiate KOER Self-Test
DTC 122
Throttle position sensor circuit below minimum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DH10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH10 - Attempt
to Generate DTC 123 or 121
KOEO Memory Code ...........................................................................................................................
................................................. Go to DH94 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH94 - Monitor
TP Circuit Under Simulated Road Shock
DTC 123
Page 7
Throttle position sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DH3 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH3 - Attempt
to Generate DTC 122
KOEO Memory Code ...........................................................................................................................
................................................. Go to DH90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH90 - Monitor
TP Circuit Under Simulated Road Shock
DTC 124
Throttle position sensor voltage higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G1 - Check for Idle Air DTCs: Initiate KOER Self-Test
DTC 125
Throttle position sensor voltage lower than expected.
Page 8
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 111 - 120, ( 112 113 114
115 116 117 118 119 ) > System Information > System Diagnosis > Page 8
Page 9
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G1 - Check for Idle Air DTCs: Initiate KOER Self-Test
DTC 126
Manifold absolute pressure or barometric pressure sensor higher or lower than expected.
KOEO Hard Code ................................................................................................................................
..................................................... Go to DF1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF1
KOER Hard Code ................................................................................................................................
..................................................... Go to DF1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF1
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DF90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF90
DTC 128
Manifold absolute pressure sensor vacuum hose damaged or disconnected.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DF11 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF11
Page 10
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 121 - 130, ( 122 123 124
125 126 127 128 129 ) > System Information > System Diagnosis > 121-128
Page 11
Code 121 - 130: Testing and Inspection 121-128
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
No DTCs OUTPUT OR DTCs NOT LISTED
KOEO self-test .....................................................................................................................................
............................................................... QA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/QA - No Codes/Codes Not Listed/QA1 - Check
VREF Voltage At Self-Test Connector
KOEO self-test .....................................................................................................................................
............................................................... QA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/QA - No Codes/Codes Not Listed/QA1 - Check
VREF Voltage At Self-Test Connector
DTC 111
System Pass.
DTC 112
Intake Air Temperature sensor circuit below minimum voltage, 254 degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA20 - Induce DTC 118 or 113
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 113
Intake air temperature sensor circuit above maximum voltage/ -4O degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA10 - Induce DTC 117 or 112
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 114
Intake air temperature higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
Page 12
KOER Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
DTC 116
Engine coolant temperature higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA1 - Check ECT or IAT Sensor
DTC 117
Page 13
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 121 - 130, ( 122 123 124
125 126 127 128 129 ) > System Information > System Diagnosis > 121-128 > Page 13
Page 14
Engine coolant temperature sensor circuit below minimum voltage 254 degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA20 - Induce DTC 118 or 113
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 118
Engine coolant temperature sensor circuit above maximum voltage/ -40 degrees F indicated.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DA10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA10 - Induce DTC 117 or 112
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DA90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant Temperature
Sensors/DA90 - Check Sensor
DTC 121
Closed throttle voltage higher or lower than expected. Indicates throttle position voltage
inconsistent with the mass air flow sensor.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DH2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH2 - Check
For Stuck Throttle Plate
KOER Hard Code ................................................................................................................................
.................................................... Go to DH1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH1 - Check for
Other DTCs
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G1 - Check for Idle Air DTCs: Initiate KOER Self-Test
DTC 122
Throttle position sensor circuit below minimum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DH10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH10 - Attempt
to Generate DTC 123 or 121
KOEO Memory Code ...........................................................................................................................
................................................. Go to DH94 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH94 - Monitor
TP Circuit Under Simulated Road Shock
Page 15
DTC 123
Throttle position sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DH3 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH3 - Attempt
to Generate DTC 122
KOEO Memory Code ...........................................................................................................................
................................................. Go to DH90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH90 - Monitor
TP Circuit Under Simulated Road Shock
DTC 124
Throttle position sensor voltage higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G1 - Check for Idle Air DTCs: Initiate KOER Self-Test
DTC 125
Page 16
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 121 - 130, ( 122 123 124
125 126 127 128 129 ) > System Information > System Diagnosis > 121-128 > Page 14
Page 17
Throttle position sensor voltage lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G1 - Check for Idle Air DTCs: Initiate KOER Self-Test
DTC 126
Manifold absolute pressure or barometric pressure sensor higher or lower than expected.
KOEO Hard Code ................................................................................................................................
..................................................... Go to DF1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF1
KOER Hard Code ................................................................................................................................
..................................................... Go to DF1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF1
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DF90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF90
DTC 128
Manifold absolute pressure sensor vacuum hose damaged or disconnected.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DF11 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DF - Manifold Absolute Pressure (MAP)/Barometric
Pressure (BP)/DF11
Page 18
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 121 - 130, ( 122 123 124
125 126 127 128 129 ) > System Information > System Diagnosis > 121-128 > Page 15
Page 19
Code 121 - 130: Testing and Inspection 129
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 129
Insufficient manifold absolute pressure sensor or mass airflow sensor change during dynamic
response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DC13 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC13 - Air Leak
at MAF Sensor
DTC 136
Lack of heated oxygen sensor switch during KOER self-test, indicates lean (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 137
Lack of heated oxygen sensor switch during KOER self-test, indicates rich (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 139
No heated oxygen sensor switches detected (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 141
Fuel system indicates lean.
KOER Hard Code ................................................................................................................................
.................................................... Go to HB1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HB - Flexible Fuel (FF) Control/HB1 - Check For
Fuel Diluted Engine Oil
DTC 144
No heated oxygen sensor switches detected (bank #1).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 157
Page 20
Mass air flow sensor circuit below minimum voltage.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC10 - Check
For Intermittent Sensor
DTC 158
Mass air flow sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun
Self-Test W/MAF Sensor Disconnected
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC21
Page 21
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 121 - 130, ( 122 123 124
125 126 127 128 129 ) > System Information > System Diagnosis > 121-128 > Page 16
Page 22
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint
Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun Self-Test W/MAF Sensor Disconnected
DTC 159
Mass air flow sensor signal higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
DTC 167
Insufficient throttle position change during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DH20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH20 - Perform
Dynamic Response Test At Wide Open Throttle
DTC 171
Fuel system at adaptive limits, heated oxygen sensor unable to switch (Bank #1)
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 23
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 131 - 140, ( 132 133 134
135 136 137 138 139 ) > System Information > System Diagnosis
Page 24
Code 131 - 140: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 129
Insufficient manifold absolute pressure sensor or mass airflow sensor change during dynamic
response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DC13 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC13 - Air Leak
at MAF Sensor
DTC 136
Lack of heated oxygen sensor switch during KOER self-test, indicates lean (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 137
Lack of heated oxygen sensor switch during KOER self-test, indicates rich (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 139
No heated oxygen sensor switches detected (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 141
Fuel system indicates lean.
KOER Hard Code ................................................................................................................................
.................................................... Go to HB1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HB - Flexible Fuel (FF) Control/HB1 - Check For
Fuel Diluted Engine Oil
DTC 144
No heated oxygen sensor switches detected (bank #1).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 157
Page 25
Mass air flow sensor circuit below minimum voltage.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC10 - Check
For Intermittent Sensor
DTC 158
Mass air flow sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun
Self-Test W/MAF Sensor Disconnected
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 -
Page 26
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 131 - 140, ( 132 133 134
135 136 137 138 139 ) > System Information > System Diagnosis > Page 20
Page 27
Rerun Self-Test W/MAF Sensor Disconnected
DTC 159
Mass air flow sensor signal higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
DTC 167
Insufficient throttle position change during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DH20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH20 - Perform
Dynamic Response Test At Wide Open Throttle
DTC 171
Fuel system at adaptive limits, heated oxygen sensor unable to switch (Bank #1)
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 28
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 141 - 150, ( 142 143 144
145 146 147 148 149 ) > System Information > System Diagnosis
Page 29
Code 141 - 150: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 129
Insufficient manifold absolute pressure sensor or mass airflow sensor change during dynamic
response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DC13 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC13 - Air Leak
at MAF Sensor
DTC 136
Lack of heated oxygen sensor switch during KOER self-test, indicates lean (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 137
Lack of heated oxygen sensor switch during KOER self-test, indicates rich (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 139
No heated oxygen sensor switches detected (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 141
Fuel system indicates lean.
KOER Hard Code ................................................................................................................................
.................................................... Go to HB1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HB - Flexible Fuel (FF) Control/HB1 - Check For
Fuel Diluted Engine Oil
DTC 144
No heated oxygen sensor switches detected (bank #1).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 157
Page 30
Mass air flow sensor circuit below minimum voltage.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC10 - Check
For Intermittent Sensor
DTC 158
Mass air flow sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun
Self-Test W/MAF Sensor Disconnected
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 -
Page 31
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 141 - 150, ( 142 143 144
145 146 147 148 149 ) > System Information > System Diagnosis > Page 24
Page 32
Rerun Self-Test W/MAF Sensor Disconnected
DTC 159
Mass air flow sensor signal higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
DTC 167
Insufficient throttle position change during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DH20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH20 - Perform
Dynamic Response Test At Wide Open Throttle
DTC 171
Fuel system at adaptive limits, heated oxygen sensor unable to switch (Bank #1)
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 33
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 151 - 160, ( 152 153 154
155 156 157 158 159 ) > System Information > System Diagnosis
Page 34
Code 151 - 160: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 129
Insufficient manifold absolute pressure sensor or mass airflow sensor change during dynamic
response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DC13 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC13 - Air Leak
at MAF Sensor
DTC 136
Lack of heated oxygen sensor switch during KOER self-test, indicates lean (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 137
Lack of heated oxygen sensor switch during KOER self-test, indicates rich (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 139
No heated oxygen sensor switches detected (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 141
Fuel system indicates lean.
KOER Hard Code ................................................................................................................................
.................................................... Go to HB1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HB - Flexible Fuel (FF) Control/HB1 - Check For
Fuel Diluted Engine Oil
DTC 144
No heated oxygen sensor switches detected (bank #1).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 157
Page 35
Mass air flow sensor circuit below minimum voltage.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC10 - Check
For Intermittent Sensor
DTC 158
Mass air flow sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun
Self-Test W/MAF Sensor Disconnected
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 -
Page 36
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 151 - 160, ( 152 153 154
155 156 157 158 159 ) > System Information > System Diagnosis > Page 28
Page 37
Rerun Self-Test W/MAF Sensor Disconnected
DTC 159
Mass air flow sensor signal higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
DTC 167
Insufficient throttle position change during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DH20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH20 - Perform
Dynamic Response Test At Wide Open Throttle
DTC 171
Fuel system at adaptive limits, heated oxygen sensor unable to switch (Bank #1)
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 38
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 161 - 170, ( 162 163 164
165 166 167 168 169 ) > System Information > System Diagnosis
Page 39
Code 161 - 170: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 129
Insufficient manifold absolute pressure sensor or mass airflow sensor change during dynamic
response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DC13 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC13 - Air Leak
at MAF Sensor
DTC 136
Lack of heated oxygen sensor switch during KOER self-test, indicates lean (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 137
Lack of heated oxygen sensor switch during KOER self-test, indicates rich (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 139
No heated oxygen sensor switches detected (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 141
Fuel system indicates lean.
KOER Hard Code ................................................................................................................................
.................................................... Go to HB1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HB - Flexible Fuel (FF) Control/HB1 - Check For
Fuel Diluted Engine Oil
DTC 144
No heated oxygen sensor switches detected (bank #1).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 157
Page 40
Mass air flow sensor circuit below minimum voltage.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC10 - Check
For Intermittent Sensor
DTC 158
Mass air flow sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun
Self-Test W/MAF Sensor Disconnected
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 -
Page 41
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 161 - 170, ( 162 163 164
165 166 167 168 169 ) > System Information > System Diagnosis > Page 32
Page 42
Rerun Self-Test W/MAF Sensor Disconnected
DTC 159
Mass air flow sensor signal higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
DTC 167
Insufficient throttle position change during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DH20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH20 - Perform
Dynamic Response Test At Wide Open Throttle
DTC 171
Fuel system at adaptive limits, heated oxygen sensor unable to switch (Bank #1)
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 43
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 171 - 180, ( 172 173 174
175 176 177 178 179 ) > System Information > System Diagnosis > 171
Page 44
Code 171 - 180: Testing and Inspection 171
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 129
Insufficient manifold absolute pressure sensor or mass airflow sensor change during dynamic
response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DC13 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC13 - Air Leak
at MAF Sensor
DTC 136
Lack of heated oxygen sensor switch during KOER self-test, indicates lean (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 137
Lack of heated oxygen sensor switch during KOER self-test, indicates rich (Bank #2).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 139
No heated oxygen sensor switches detected (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 141
Fuel system indicates lean.
KOER Hard Code ................................................................................................................................
.................................................... Go to HB1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HB - Flexible Fuel (FF) Control/HB1 - Check For
Fuel Diluted Engine Oil
DTC 144
No heated oxygen sensor switches detected (bank #1).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 157
Page 45
Mass air flow sensor circuit below minimum voltage.
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC10 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC10 - Check
For Intermittent Sensor
DTC 158
Mass air flow sensor circuit above maximum voltage.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DC21 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun
Self-Test W/MAF Sensor Disconnected
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DC21
Page 46
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 171 - 180, ( 172 173 174
175 176 177 178 179 ) > System Information > System Diagnosis > 171 > Page 37
Page 47
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint
Tests/DC - Mass Air Flow (MAF) Sensor/DC21 - Rerun Self-Test W/MAF Sensor Disconnected
DTC 159
Mass air flow sensor signal higher or lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
KOER Hard Code ................................................................................................................................
.................................................... Go to DC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DC - Mass Air Flow (MAF) Sensor
DTC 167
Insufficient throttle position change during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................. Go to DH20 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DH - Throttle Position (TP) Sensor/DH20 - Perform
Dynamic Response Test At Wide Open Throttle
DTC 171
Fuel system at adaptive limits, heated oxygen sensor unable to switch (Bank #1)
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 48
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 171 - 180, ( 172 173 174
175 176 177 178 179 ) > System Information > System Diagnosis > 171 > Page 38
Page 49
Code 171 - 180: Testing and Inspection 172 - 179
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 172
Lack of heated oxygen sensor switches indicates lean (bank # 1).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 173
Lack of heated oxygen sensor switches. Indicates rich (bank #1).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 174
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 175
Fuel system at adaptive limits, heated oxygen sensor unable to switch (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 176
Lack of heated oxygen sensor switches, indicates lean (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 177
Lack of heated oxygen sensor switches, indicates rich (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 50
DTC 178
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 179
Fuel system at lean adaptive limit at part throttle, system rich (bank #1).
Page 51
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 171 - 180, ( 172 173 174
175 176 177 178 179 ) > System Information > System Diagnosis > 171 > Page 39
Page 52
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 181
Fuel system at rich adaptive limit at part throttle, system lean (bank #1).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
Page 53
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 181 - 190, ( 182 183 184
185 186 187 188 189 ) > System Information > System Diagnosis > 181
Page 54
Code 181 - 190: Testing and Inspection 181
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 172
Lack of heated oxygen sensor switches indicates lean (bank # 1).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 173
Lack of heated oxygen sensor switches. Indicates rich (bank #1).
KOER Hard Code ................................................................................................................................
....................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 174
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 175
Fuel system at adaptive limits, heated oxygen sensor unable to switch (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 176
Lack of heated oxygen sensor switches, indicates lean (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 177
Lack of heated oxygen sensor switches, indicates rich (bank #2).
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
Page 55
DTC 178
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H1 - Check For Diluted Engine Oil
DTC 179
Fuel system at lean adaptive limit at part throttle, system rich (bank #1).
Page 56
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 181 - 190, ( 182 183 184
185 186 187 188 189 ) > System Information > System Diagnosis > 181 > Page 44
Page 57
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 181
Fuel system at rich adaptive limit at part throttle, system lean (bank #1).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
Page 58
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 181 - 190, ( 182 183 184
185 186 187 188 189 ) > System Information > System Diagnosis > 181 > Page 45
Page 59
Code 181 - 190: Testing and Inspection 184 - 189
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 184
Mass air flow higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G7 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G7 - Visually Inspect MAF Sensor
DTC 185
Mass air flow lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G7 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G7 - Visually Inspect MAF Sensor
DTC 186
Injector pulsewidth higher than expected or mass airflow sensor lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G9 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G9 - Visual Vacuum Checks
DTC 187
Injector pulsewidth lower than expected or Mass air flow higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G9 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G9 - Visual Vacuum Checks
DTC 188
Fuel system at lean adaptive limit at part throttle, system rich (bank #2).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 189
Fuel system at rich adaptive limit at part throttle, system lean (bank #2).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 194
Page 60
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H5 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H5 - Cylinder Balance Diagnostic
Test Mode: MFI Engines
DTC 195
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H5 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H5 - Cylinder Balance Diagnostic
Test Mode: MFI Engines
DTC 211
Profile ignition pickup circuit failure.
Page 61
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 181 - 190, ( 182 183 184
185 186 187 188 189 ) > System Information > System Diagnosis > 181 > Page 46
Page 62
KOEO Memory Code ...........................................................................................................................
.................................................... Go to NC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC1 - Continuous Code 211: Erratic Ignition
DTC 212
Loss of ignition diagnostic monitor input to powertrain control module or spark output circuit
grounded.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to NC3 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC3 - Continuous Code 212: Check For Other EEC Codes
DTC 213
Spark output circuit open.
KOER Hard Code ................................................................................................................................
..................................................... Go to PC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/PC - Spark Timing Check -- High Data Rate/PC1 Check Power to PCM
DTC 214
Cylinder identification circuit failure.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 215
Powertrain control module detected coil 1 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 216
Powertrain control module detected coil 2 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 217
Powertrain control module detected coil 3 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 218
Loss of ignition diagnostic monitor signal-left side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 219
Spark timing defaulted to 10 degrees, spark output circuit open.
Page 63
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
Page 64
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 191 - 200, ( 192 193 194
195 196 197 198 199 ) > System Information > System Diagnosis
Page 65
Code 191 - 200: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 184
Mass air flow higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G7 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G7 - Visually Inspect MAF Sensor
DTC 185
Mass air flow lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G7 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G7 - Visually Inspect MAF Sensor
DTC 186
Injector pulsewidth higher than expected or mass airflow sensor lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G9 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G9 - Visual Vacuum Checks
DTC 187
Injector pulsewidth lower than expected or Mass air flow higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G9 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G9 - Visual Vacuum Checks
DTC 188
Fuel system at lean adaptive limit at part throttle, system rich (bank #2).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 189
Fuel system at rich adaptive limit at part throttle, system lean (bank #2).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 194
Page 66
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H5 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H5 - Cylinder Balance Diagnostic
Test Mode: MFI Engines
DTC 195
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H5 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H5 - Cylinder Balance Diagnostic
Test Mode: MFI Engines
DTC 211
Profile ignition pickup circuit failure.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to NC1
Page 67
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 191 - 200, ( 192 193 194
195 196 197 198 199 ) > System Information > System Diagnosis > Page 50
Page 68
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint
Tests/NC - Ignition Diagnostic Monitor -- High Data Rate/NC1 - Continuous Code 211: Erratic
Ignition
DTC 212
Loss of ignition diagnostic monitor input to powertrain control module or spark output circuit
grounded.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to NC3 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC3 - Continuous Code 212: Check For Other EEC Codes
DTC 213
Spark output circuit open.
KOER Hard Code ................................................................................................................................
..................................................... Go to PC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/PC - Spark Timing Check -- High Data Rate/PC1 Check Power to PCM
DTC 214
Cylinder identification circuit failure.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 215
Powertrain control module detected coil 1 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 216
Powertrain control module detected coil 2 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 217
Powertrain control module detected coil 3 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 218
Loss of ignition diagnostic monitor signal-left side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 219
Spark timing defaulted to 10 degrees, spark output circuit open.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
Page 69
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 211 - 220, ( 212 213 214
215 216 217 218 219 ) > System Information > System Diagnosis
Page 70
Code 211 - 220: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 184
Mass air flow higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G7 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G7 - Visually Inspect MAF Sensor
DTC 185
Mass air flow lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G7 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G7 - Visually Inspect MAF Sensor
DTC 186
Injector pulsewidth higher than expected or mass airflow sensor lower than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G9 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G9 - Visual Vacuum Checks
DTC 187
Injector pulsewidth lower than expected or Mass air flow higher than expected.
KOEO Memory Code ...........................................................................................................................
...................................................... Go to G9 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/G - In-Range MAF/TPS/Fuel Injector Pulse Width
Test/G9 - Visual Vacuum Checks
DTC 188
Fuel system at lean adaptive limit at part throttle, system rich (bank #2).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 189
Fuel system at rich adaptive limit at part throttle, system lean (bank #2).
KOEO Memory Code ...........................................................................................................................
.................................................... Go to HA1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/HA - Adaptive Fuel/HA1 - Check For Other Codes
DTC 194
Page 71
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H5 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H5 - Cylinder Balance Diagnostic
Test Mode: MFI Engines
DTC 195
KOEO Memory Code ...........................................................................................................................
...................................................... Go to H5 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/H - Fuel Control/H5 - Cylinder Balance Diagnostic
Test Mode: MFI Engines
DTC 211
Profile ignition pickup circuit failure.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to NC1
Page 72
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 211 - 220, ( 212 213 214
215 216 217 218 219 ) > System Information > System Diagnosis > Page 54
Page 73
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint
Tests/NC - Ignition Diagnostic Monitor -- High Data Rate/NC1 - Continuous Code 211: Erratic
Ignition
DTC 212
Loss of ignition diagnostic monitor input to powertrain control module or spark output circuit
grounded.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to NC3 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC3 - Continuous Code 212: Check For Other EEC Codes
DTC 213
Spark output circuit open.
KOER Hard Code ................................................................................................................................
..................................................... Go to PC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/PC - Spark Timing Check -- High Data Rate/PC1 Check Power to PCM
DTC 214
Cylinder identification circuit failure.
KOEO Memory Code ...........................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 215
Powertrain control module detected coil 1 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 216
Powertrain control module detected coil 2 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 217
Powertrain control module detected coil 3 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 218
Loss of ignition diagnostic monitor signal-left side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 219
Spark timing defaulted to 10 degrees, spark output circuit open.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
Page 74
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 221 - 230, ( 222 223 224
225 226 227 228 229 ) > System Information > System Diagnosis
Page 75
Code 221 - 230: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 221
Spark timing error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 222
Loss of ignition diagnostic monitor signal-right side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 223
Loss of dual plug inhibit control. KOEO Memory Code - Go to Ignition System / Testing and
Inspection.
DTC 224
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 225
Knock not sensed during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................... Go to DG1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DG - Knock Sensor/DG1 - Check Sensor Voltage
Cycling
DTC 226
Ignition diagnostic monitor signal not received.
KOEO Hard Code ................................................................................................................................
.................................................... Go to NC2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC2 - Service Code 226: IDM Circuit Failure
DTC 232
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 238
Powertrain control module detected coil 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 241
Page 76
Ignition control module to powertrain control module ignition diagnostic monitor pulsewidth
transmission error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 244
Cylinder Identification circuit fault present when cylinder balance test requested.
KOER Hard Code ................................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 311
Secondary air injection system inoperative during KOER self-test (bank #1).
Page 77
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 221 - 230, ( 222 223 224
225 226 227 228 229 ) > System Information > System Diagnosis > Page 58
Page 78
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 312
Secondary air injection system misdirected during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 313
Secondary air injection system not bypassed during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 314
Secondary air injection system system inoperative during KOER self-test (bank #2)
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 326
Exhaust gas recirculation valve pressure sensor circuit voltage lower than expected.
KOER Hard Code ................................................................................................................................
................................................... Go to DL22 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
Page 79
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 231 - 240, ( 232 233 234
235 236 237 238 239 ) > System Information > System Diagnosis
Page 80
Code 231 - 240: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 221
Spark timing error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 222
Loss of ignition diagnostic monitor signal-right side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 223
Loss of dual plug inhibit control. KOEO Memory Code - Go to Ignition System / Testing and
Inspection.
DTC 224
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 225
Knock not sensed during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................... Go to DG1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DG - Knock Sensor/DG1 - Check Sensor Voltage
Cycling
DTC 226
Ignition diagnostic monitor signal not received.
KOEO Hard Code ................................................................................................................................
.................................................... Go to NC2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC2 - Service Code 226: IDM Circuit Failure
DTC 232
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 238
Powertrain control module detected coil 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 241
Page 81
Ignition control module to powertrain control module ignition diagnostic monitor pulsewidth
transmission error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 244
Cylinder Identification circuit fault present when cylinder balance test requested.
KOER Hard Code ................................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 311
Secondary air injection system inoperative during KOER self-test (bank #1).
Page 82
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 231 - 240, ( 232 233 234
235 236 237 238 239 ) > System Information > System Diagnosis > Page 62
Page 83
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 312
Secondary air injection system misdirected during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 313
Secondary air injection system not bypassed during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 314
Secondary air injection system system inoperative during KOER self-test (bank #2)
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 326
Exhaust gas recirculation valve pressure sensor circuit voltage lower than expected.
KOER Hard Code ................................................................................................................................
................................................... Go to DL22 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
Page 84
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 241 - 250, ( 242 243 244
245 246 247 248 249 ) > System Information > System Diagnosis
Page 85
Code 241 - 250: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 221
Spark timing error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 222
Loss of ignition diagnostic monitor signal-right side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 223
Loss of dual plug inhibit control. KOEO Memory Code - Go to Ignition System / Testing and
Inspection.
DTC 224
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 225
Knock not sensed during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................... Go to DG1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DG - Knock Sensor/DG1 - Check Sensor Voltage
Cycling
DTC 226
Ignition diagnostic monitor signal not received.
KOEO Hard Code ................................................................................................................................
.................................................... Go to NC2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC2 - Service Code 226: IDM Circuit Failure
DTC 232
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 238
Powertrain control module detected coil 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 241
Page 86
Ignition control module to powertrain control module ignition diagnostic monitor pulsewidth
transmission error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 244
Cylinder Identification circuit fault present when cylinder balance test requested.
KOER Hard Code ................................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 311
Secondary air injection system inoperative during KOER self-test (bank #1).
Page 87
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 241 - 250, ( 242 243 244
245 246 247 248 249 ) > System Information > System Diagnosis > Page 66
Page 88
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 312
Secondary air injection system misdirected during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 313
Secondary air injection system not bypassed during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 314
Secondary air injection system system inoperative during KOER self-test (bank #2)
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 326
Exhaust gas recirculation valve pressure sensor circuit voltage lower than expected.
KOER Hard Code ................................................................................................................................
................................................... Go to DL22 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
Page 89
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 311 - 320, ( 312 313 314
315 316 317 318 319 ) > System Information > System Diagnosis
Page 90
Code 311 - 320: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 221
Spark timing error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 222
Loss of ignition diagnostic monitor signal-right side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 223
Loss of dual plug inhibit control. KOEO Memory Code - Go to Ignition System / Testing and
Inspection.
DTC 224
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 225
Knock not sensed during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................... Go to DG1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DG - Knock Sensor/DG1 - Check Sensor Voltage
Cycling
DTC 226
Ignition diagnostic monitor signal not received.
KOEO Hard Code ................................................................................................................................
.................................................... Go to NC2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC2 - Service Code 226: IDM Circuit Failure
DTC 232
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 238
Powertrain control module detected coil 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 241
Page 91
Ignition control module to powertrain control module ignition diagnostic monitor pulsewidth
transmission error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 244
Cylinder Identification circuit fault present when cylinder balance test requested.
KOER Hard Code ................................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 311
Secondary air injection system inoperative during KOER self-test (bank #1).
Page 92
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 311 - 320, ( 312 313 314
315 316 317 318 319 ) > System Information > System Diagnosis > Page 70
Page 93
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 312
Secondary air injection system misdirected during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 313
Secondary air injection system not bypassed during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 314
Secondary air injection system system inoperative during KOER self-test (bank #2)
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 326
Exhaust gas recirculation valve pressure sensor circuit voltage lower than expected.
KOER Hard Code ................................................................................................................................
................................................... Go to DL22 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
Page 94
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 321 - 330, ( 322 323 324
325 326 327 328 329 ) > System Information > System Diagnosis > 326
Page 95
Code 321 - 330: Testing and Inspection 326
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 221
Spark timing error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 222
Loss of ignition diagnostic monitor signal-right side.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 223
Loss of dual plug inhibit control. KOEO Memory Code - Go to Ignition System / Testing and
Inspection.
DTC 224
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 225
Knock not sensed during dynamic response test KOER.
KOER Hard Code ................................................................................................................................
.................................................... Go to DG1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DG - Knock Sensor/DG1 - Check Sensor Voltage
Cycling
DTC 226
Ignition diagnostic monitor signal not received.
KOEO Hard Code ................................................................................................................................
.................................................... Go to NC2 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/NC - Ignition Diagnostic Monitor -- High Data
Rate/NC2 - Service Code 226: IDM Circuit Failure
DTC 232
Powertrain control module detected coil 1, 2, 3 or 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 238
Powertrain control module detected coil 4 primary circuit failure.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 241
Page 96
Ignition control module to powertrain control module ignition diagnostic monitor pulsewidth
transmission error.
KOEO Memory Code - Go to Ignition System / Testing and Inspection.
DTC 244
Cylinder Identification circuit fault present when cylinder balance test requested.
KOER Hard Code ................................................................................................................................
.................................................... Go to DR1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DR - Cylinder Identification (CID) Sensor/DR1 - Will
Engine Start
DTC 311
Secondary air injection system inoperative during KOER self-test (bank #1).
Page 97
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 321 - 330, ( 322 323 324
325 326 327 328 329 ) > System Information > System Diagnosis > 326 > Page 75
Page 98
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 312
Secondary air injection system misdirected during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 313
Secondary air injection system not bypassed during KOER self-test.
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 314
Secondary air injection system system inoperative during KOER self-test (bank #2)
KOER Hard Code ................................................................................................................................
.................................................... Go to KC1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/KC - Secondary Air Injection Solenoids/KC1 Visually Inspect Vacuum Hoses
DTC 326
Exhaust gas recirculation valve pressure sensor circuit voltage lower than expected.
KOER Hard Code ................................................................................................................................
................................................... Go to DL22 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
Page 99
Ford Explorer 2wd Workshop Manual (V6-245 4.0L (1994))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > Code 321 - 330, ( 322 323 324
325 326 327 328 329 ) > System Information > System Diagnosis > 326 > Page 76
Page 100
Code 321 - 330: Testing and Inspection 327 - 328
NOTE
KOEO refers to Key On Engine Off (KOEO) KOER refers to Key On Engine Running (KOER) DTC
refers to Diagnostic Trouble Code (DTC) DTCs should be diagnosed in the order they are received.
DTC 327
Exhaust gas recirculation valve sensor circuit below minimum voltage.
KOEO Hard Code ................................................................................................................................
.................................................... Go to DL1 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL1 - Induce DTC 337
KOER Hard Code ................................................................................................................................
................................................... Go to DL22 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DL90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL90 - All Continuous Memory EGR DTC: Intermittent Verification
DTC 328
Exhaust gas recirculation valve position sensor closed voltage lower than expected.
KOEO Hard Code ................................................................................................................................
.................................................. Go to DN25 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR Vacuum
Regulator Solenoid/DN25 - Check EVP Sensor and EGR Valve Operation
KOER Hard Code ................................................................................................................................
.................................................. Go to DN25 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR Vacuum
Regulator Solenoid/DN25 - Check EVP Sensor and EGR Valve Operation
KOEO Memory Code ...........................................................................................................................
................................................. Go to DN90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR Vacuum
Regulator Solenoid/DN90 - Check Intermittent Sensor
DTC 332
Insufficient exhaust gas recirculation flow detected.
KOER Hard Code ................................................................................................................................
................................................... Go to DL30 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL30 - Verify Vacuum Present At EGR Valve
KOEO Memory Code ...........................................................................................................................
.................................................. Go to DL90 See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL90 - All Continuous Memory EGR DTC: Intermittent Verification
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