
Case MX/TG Fault codes
ENGINE
111 Engine Controller Failure - Hardware Failure
115 Engine Speed Sensor signal is failed (no signal at engine controller pin A17)
121 Engine Position Sensor signal is failed (no signal at engine controller pin A9)
122 Boost Pressure Sensor voltage is too high (engine controller pin A45)
123 Boost Pressure Sensor voltage is too low (engine controller pin A45)
124 Boost Pressure level has exceeded the warning limit.
131 Foot Throttle Position potentiometer voltage is too high (engine controller pin B30)
132 Foot Throttle Position potentiometer voltage is too low (engine controller pin B30)
135 Oil Pressure Sensor voltage is too high (engine controller pin A33)
141 Oil Pressure Sensor voltage is too low (engine controller pin A33)
143 Oil Pressure level has fallen below the warning limit.
144 Coolant Temperature Sensor voltage is too high (engine controller pin A23)
145 Coolant Temperature Sensor voltage is too low (engine controller pin A23)
146 Coolant Temperature level has exceeded the warning limit.
151 Coolant Temperature level has exceeded the warning limit.
153 Intake Manifold Temperature Sensor voltage is too high (engine controller pin A34)
154 Intake Manifold Temperature Sensor voltage is too low (engine controller pin A34)
155 Intake Manifold Temperature level has exceeded the warning limit.
211 Communications problem with Armrest, Instrumentation, or Transmission
Controllers
234 Engine Speed has exceed the overspeed warning limit.
235 Engine Coolant Level is low. Add coolant fluid.
263 Fuel Temperature Sensor voltage is too high (engine controller pin A35)
265 Fuel Temperature Sensor voltage is too low (engine controller pin A35)
268 Fuel Pressure in pump is not changing with operating conditions.
271 Front Pumping Control Valve current is low during "click test" (pin A21)(open circuit)
272 Front Pumping Control Valve current is high (pin A21)(short circuit)
273 Rear Pumping Control Valve current is low during "click test" (pin A15)(open circuit)
274 Rear Pumping Control Valve current is high (pin A15)(short circuit)
275 Front Pumping element is failed
276 Injection Control Valve current is out of range (engine controller pin A7)(open or
short)
277 Injection Control Valve is failed (engine controller pin A7)(open or short)
278 Fuel Lift Pump is failed (engine controller pin 11)
279 Injection Control Valve current is out of range (engine controller pin A7)(open or
short)
281 Front Pumping element is failed
282 Rear Pumping element is failed
283 Engine Speed/Position Sensor supply voltage is too high (controller pin A8)
284 Engine Speed/Position Sensor supply voltage is too low (controller pin A8)
319 Real Time Clock in controller has lost power
328 Rear Pumping element is failed
329 CAPS Pump has an overpumping failure
352 5 Volt Sensor Supply voltage is too low (engine controller pin A10)
386 5 Volt Sensor Supply voltage is too high (engine controller pin A10)
387 Foot Throttle 5 Volt Supply voltage is too high (engine controller pin B29)
415 Oil Pressure level has fallen below the very low warning limit.

418 Water in Fuel sensor (optional) indicates the water in the fuel filter needs to be
drained.
422 Engine Coolant Level Sensor (optional) is failed or the jumper plug is missing
429 Water in Fuel Sensor (optional) voltage is too low. (engine controller pin B40)
431 Foot Throttle Idle Validation Switches are both closed (engine controller pins B25,
B26)
432 Foot Throttle position potentiometer and switches disagree.
433 Boost Pressure level disagrees with engine operation conditions (speed & power)
434 Unswitched 12 volt supply voltage disconnected without normal key off sequence.
441 Battery Voltage is too Low (less than 6 volts)
442 Battery Voltage is too High
443 Foot Throttle 5 Volt Supply voltage is too low (engine controller pin B29)
449 Fuel Pressure level has exceeded the warning limit.
451 Fuel Pressure Sensor voltage is too high (engine controller pin A46)
452 Fuel Pressure Sensor voltage is too low (engine controller pin A46)
456 Fuel Pressure in pump is not changing with operating conditions.
488 Intake Manifold Temperature level has exceeded the warning limit.
493 The Injection Control Identifier Circuit in the harness has failed.
539 The Injection Control Valve Transorb in the harness has failed. (open circuit)
551 Foot Throttle Idle Validation Switches are both open (engine controller pins B25,
B26)
611 ECM detected engine initiated protection shutdown or keyed-off while above
specific load limit
TRANS
11 Master Clutch Potentiometer Open Circuit or short to ground
12 Master Clutch Potentiometer Short to +12 Volts or short to 5 Vreff
24 None of the transmission clutches are calibrated
37 BOC switch open circuit or Neutral relay stuck open
38 Shuttled to reverse when no wheel speed signal was available
47 Clutch pedal bottom of clutch switch misadjusted
48 BOC switch or Neutral relay short circuit
50 Park Brake is powered off when in park
51 FNRP pod indicates Forward or Reverse is on, when Park is on
52 Park Brake is stuck on when commanded off
53 5 volt reference voltage too high
54 5 volt reference voltage too low
59 FNRP pod in illogical state (two positions on at same time)
60 FNRP pod in illogical state (in no position)
66 FNRP Pod Forward switch is shorted to ground or open circuit
67 FNRP Pod Forward switch is shorted to power
68 FNRP Pod Reverse switch is shorted to ground or open circuit
69 FNRP Pod Reverse switch is shorted to power
70 Battery voltage is too low for clutch solenoid operation
72 Transmission Oil Temperature is above 122 deg. C
76 Transmission Over Speed Warning
77 No signal from wheel speed sensor
78 Transmission regulated pressure accumulator is discharged
79 Engine RPM from the alternator is measured too high
80 Wheel speed sensor is measured too high
81 Transmission clutches are slipping
103 Odd clutch solenoid or its wiring failed open or shorted to ground
104 Even clutch solenoid or its wiring failed open or shorted to ground

105 C1-2 clutch solenoid or its wiring failed open or shorted to ground
106 C3-4 clutch solenoid or its wiring failed open or shorted to ground
107 C5-6 clutch solenoid or its wiring failed open or shorted to ground
108 Master clutch solenoid or its wiring failed open or shorted to ground
109 Low range clutch solenoid or its wiring failed open or shorted to ground
110 Mid range clutch solenoid or its wiring failed open or shorted to ground
111 High range clutch solenoid or its wiring failed open or shorted to ground
112 Reverse clutch solenoid or its wiring failed open or shorted to ground
113 Creeper clutch solenoid or its wiring failed open or shorted to ground
114 Even clutch solenoid coil or its wiring shorted to power
115 Odd clutch solenoid coil or its wiring shorted to power
116 C1-2 clutch solenoid coil or its wiring shorted to power
117 C3-4 clutch solenoid coil or its wiring shorted to power
118 C5-6 clutch solenoid coil or its wiring shorted to power
119 Master clutch solenoid coil or its wiring shorted to power
120 Low range clutch solenoid coil or its wiring shorted to power
121 Mid range clutch solenoid coil or its wiring shorted to power
122 High range clutch solenoid coil or its wiring shorted to power
123 Reverse clutch solenoid coil or its wiring shorted to power
124 Creeper clutch solenoid coil or its wiring shorted to power
125 Odd clutch is not calibrated 126 Even clutch is not calibrated
127 C1-2 clutch is not calibrated
128 C3-4 clutch is not calibrated
129 C5-6 clutch is not calibrated
130 Low range clutch is not calibrated
131 Mid range clutch is not calibrated
132 High range clutch is not calibrated
133 Reverse clutch is not calibrated
134 Master clutch is not calibrated
135 Communication lost with the armrest controller
136 Communication lost with the instrumentation controller
137 Front Suspension raise lock solenoid circuit shorted or open circuit
138 Front Suspension raise solenoid circuit shorted or open circuit
139 Front Suspension lower lock solenoid circuit shorted or open circuit
140 Front suspension position is above the expected absolute limit
141 Front suspension position is below the expected absolute limit
142 Front suspension travel range has not been calibrated
143 Front suspension position is above the upper suspension range
144 Front suspension position is below the lower suspension range
145 Front Suspension lower lock solenoid circuit shorted or open circuit
147 Regulated system pressure below 290 PSI
148 Backup alarm circuit shorted or open
ARM
19 Hand THROTTLE potentiometer is failed
29 Aux 1st remote valve LEVER potentiometer is failed
39 Aux 2nd remote valve LEVER potentiometer is failed
49 Aux 3rd remote valve LEVER potentiometer is failed
59 Aux 4th remote valve LEVER potentiometer is failed
69 HITCH POSITION command potentiometer is failed
79 HITCH LOAD command potentiometer is failed
89 Aux 1st remote valve FLOW potentiometer is failed
99 Aux 2nd remote valve FLOW potentiometer is failed