IVECO Truck Fault Codes DTC
DTC / FMI / Failing component / Type of Failure / Visible failure / Possible
Cause / Repair action
123 Edc lamp. Warning light permanently off. Short circuit or defective wiring.
Check wiring.
124 Cold start lam. Warning light permanently off. Short circuit or defective
wiring. Check wiring.
125 Main relay defect. Possible problems during after-run. Relay short circuit to
battery positive or ground. Check wiring between ECM and battery. Replace relay if
necessary.
126 Battery voltage. Possible problems during after-run. Alternator or battery
defective. Possible wiring problem. Check wiring.
Replace alternator regulator or battery Replace the alternator if necessary.
127 Engine brake electro valve. Engine brake not operational. Relay or wiring
short-circuited or interrupted. Check wiring. Replace relay if necessary.
128 Main relay - short circuit to battery. Possible problems during after-run.
Relay short circuit to battery positive or ground. Relay may be faulty. Check
wiring between ECM and battery. Replace relay if necessary.
129 Air conditioner compressor relay. Possible problems during after run. Relay
short circuit to battery positive or ground. Relay may be faulty. Check wiring
between ECM and battery. Replace relay if necessary.
113 Accelerator pedal / brake pedal suspect. Vehicle acceleration very slow. Engine
idle speed: 500 rpm. Accelerator pedal and brake pressed simultaneously (for too
long); Accelerator pedal blocked or faulty; Incorrect use of vehicle. Check the
accelerator pedal signal and pedal mechanical movement.
116 Clutch signal suspect. The parameter reading shows that the clutch is pressed.
Clutch switch faulty or wiring problems in pedal. Check clutch pedal switch and
wiring.
117 Brake pedal signal error. Slight power reduction. Main and secondary brake
switch not synchronized. One of the two brake pedal switches may be stuck. Check
the synchronization of both switches (signal) and wiring.
119 Plausibility + 15. Possible mechanical problem (in pawl) or electrical problem.
Check wiring.
121 Speed ??limiter w / light. Warning light permanently off. Short circuit or
defective wiring. Check wiring.
122 Warning light ODB. Warning light permanently off. Short circuit or defective
wiring. Check wiring.
12A Relays for engine brake valve. Possible problems during after run. Relay short
circuit to battery positive or ground. Relay may be faulty. Check wiring between
ECM and battery. Replace relay if necessary.
12B Thermostarter relay 1 (heater). Heater not working. Relay or wiring short
circuited or interrupted. Check wiring. Replace relay if necessary.
12C Thermostarter relay 2. Heater not working. Relay or wiring short circuited or
interrupted. Check wiring. Replace relay if necessary.
12E Management system pre / post heating (active). Grid heater permanently
operating. Grid heater short circuited to ground. Check wiring and component.
131 Coolant temperature sensor. No reaction noticeable on behalf of the driver.
Sensor short -circuited or value implausible. Check the wiring. Replace sensor if
necessary.
132 Coolant temperature sensor (test). Slight power reduction. Operation in extreme
environmental conditions or sensor inaccurate. Ensure the engine is not working in
extreme environmental conditions. Check the wiring and the sensor accuracy. Replace
sensor if necessary.
133 Air temperature sensor boost air. Slight power reduction. Sensor short
circuited or value implausible. Check the wiring. Replace sensor if necessary.
134 Boost pressure sensor. No reaction perceivable by the driver.
Parameter recovery value: 2700 mbar. Sensor short circuited or difference between
environmental pressure and turbo pressure implausible. Check the wiring. Also check
the environ- mental pressure sensor. Replace sensor if necessary.
135 Fuel temperature sensor. Slight power reduction. Sensor short-circuited or
value implausible. Check the wiring. Replace sensor if necessary.
138 Oil pressure sensor. No reaction perceivable by the driver. Parameter recovery
value: 3000 mbar. Sensor short-circuited or value implausible. Check the wiring and
oil level. Replace sensor if necessary.
13A Oil temperature sensor. No reaction perceivable by the driver.
Parameter recovery value: coolant temperature value (if intact) otherwise 120C.
Sensor short-circuited or value implausible. Check the wiring. Replace sensor if
necessary.
13C Atmospheric temperature sensor (humidtiy?). No reaction perceivable by the
driver. Parameter recovery value: 40 C. Sensor short-circuited or value
implausible. Check the wiring. Replace sensor if necessary.
141 Crankshaft speed. No reaction noticeable on behalf of the driver. Signal
interrupted or wiring problem. Sensor installation may not be correct. Check wiring
and installation. Replace sensor if necessary.
142 Engine working only. With camshaft sensor. No reaction perceivable by the
driver. Signal interrupted or wiring problem. Sensor installation may not be
correct. Check wiring and installation. Replace sensor if necessary.
143 Camshaft senso. No reaction perceivable by the driver. Signal interrupted or
wiring problem. Sensor installation may not be correct. Check wiring and
installation. Replace sensor if necessary.
144 Fault between fly-Wheel sensor and camshaft. No reaction noticeable on behalf
of the driver. Signal interrupted or wiring problem. Flywheel and timing sensor
installation may be incorrect.
Check wiring and installation of both sensors.
145 Fan relay. No reaction perceivable by the driver. Fan off.
Short circuit or fan actuator faulty. Check the wiring and the fan actuator.
Replace the actuator if necessary.
148 Air conditioner compressor relay. Air conditioner permanently off. Wiring or
relay short-circuited. Check the wiring. Replace relay if necessary.
149 Preheating relay fuel. Filter Filter heater not working. Wiring or filter
heater short-circuited. Check the wiring. Replace the filter heater if necessary.
151 Injector cylinder 1. The engine runs on 5 cylinders. Injector no.1 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC -connector.
152 Injector cylinder 2. The engine runs on 5 cylinders. Injector no.2 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC connector.
153 Injector cylinder. The engine runs on 5 cylinders. Injector no.3 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC connector.
149 Pre-heating relay fuel. Filter Filter heater not working. Wiring or filter
heater short-circuited. Check the wiring. Replace the filter heater if necessary.
151 Injector cylinder 1. The engine runs on 5 cylinders. Injector no.1 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC-connector.
152 Injector cylinder 2. The engine runs on 5 cylinders. Injector no.2 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring between the solenoid valve and EDC-connector.
153 Injector cylinder 3. The engine runs on 5 cylinders. Injector no.3 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC-connector.
154 Injector Cylinder 4. The engine runs on 5 cylinders. Injector no.4 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC connector.
155 Injector Cylinder 5. The engine runs on 5 cylinders. Injector no.5 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC connector.
156 Injector Cylinder 6. The engine runs on 5 cylinders. Injector no.6 electric
trouble. Check correct tightness to torque of the connectors on the solenoid valve
of the injector (1.36 - 1.92 Nm). Check the integrity of the injector coil and
replace the injector if defective. If the coil is integral, check the wiring
between the solenoid valve and EDC connector.
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