GMC DTC-P1411, DTC-P1414, DTC-P245A, DTC-P245C, DTC-P245D User Manual
2020-09-25, 8:31 AMDocument ID: 3635270
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DTC P1411
DTC P1412
DTC P1413
DTC P1414
DTC P245A
DTC P245C
DTC P245D
2015 GMC Truck Sierra - 4WD | Cheyenne, Sierra, Silverado Service Manual 7526957 | Document ID: 3635270
DTC P1411-P1414, P245A, P245C, or P245D
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit 2 Low Voltage
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit 2 High Voltage
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit Shorted
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Current Performance
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit Low Voltage
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit High Voltage
Diagnostic Fault Information
Circuit
Short to
Ground
Open/High
Resistance
Short to
Voltage
Signal
Performance
EGR Cooler Bypass Motor Open
Control
P245C P245A
P1414,
P245D
P2493
EGR Cooler Bypass Motor Close
Control
P1411 P245A
P1412,
P1414
P2493
Circuit/System Description
The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) bypass valve position
sensor to determine the position of the bypass valve. The ECM sends a reference voltage through
the 5-volt reference circuit to the position sensor. The ECM provides a voltage return path for the
sensor through the low reference circuit. A variable voltage signal, based on the valve position, is
sent from the sensor to the ECM through the position sensor signal circuit. The ECM compares the
actual bypass valve position with the desired bypass valve position when the valve is commanded
open or closed.
The EGR cooler bypass valve is controlled by the ECM through the bypass valve motor high control
and the low control circuits. The ECM will pulse width modulate the low control circuit to ground
when EGR cooler bypass is desired.
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2020-09-25, 8:31 AMDocument ID: 3635270
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Conditions for Running the DTC
P1411, P1412, P1413, P1414, P245C and P245D
The Ignition is ON.
The battery voltage is greater than 11 V.
The EGR cooler bypass valve control circuit is active.
The starter is not cranking.
The DTCs run continuously when the above conditions are met.
P245A
The Ignition is OFF.
The engine is in after-run/post drive.
The battery voltage is greater than 11 V.
The EGR cooler bypass valve offset learning procedure is complete.
The EGR cooler bypass valve control circuit is active.
The starter is not cranking.
The DTC runs continuously when the above conditions are met.
OR
The Ignition is ON.
The battery voltage is greater than 11 V.
The EGR control circuit is active.
The starter is not cranking.
The DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P1411
The ECM detects that the EGR cooler bypass valve low, close, control circuit voltage is less than a
calibrated threshold for greater than 3 s.
P1412
The ECM detects that the EGR cooler bypass valve low, close, control circuit voltage is greater than a
calibrated threshold for greater than 3 s.
P1413
The ECM detects a short circuit condition of the EGR cooler bypass valve motor control circuits for
greater than 3 s.
P1414
The ECM detects that the EGR cooler bypass valve control circuit current is greater than a calibrated
threshold for greater than 2 s.
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