Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition





Note! For certain versions of model year 1999, diagnostic trouble code ECM-0023 is shown instead. Troubleshooting shall be performed according to ECM-4050.

The rear electronic module transmits information about the fuel level and the fault status of the fuel level sensor to the central electronic module (CEM). The central electronic module (CEM) transmits this information to the engine control module (ECM).
Diagnostic trouble code (DTC) REM-4A31, REM-4A33, REM-4A34, REM-4A37 or REM-4A38 is stored in the rear electronic module and diagnostic trouble code (DTC) ECM-4050 is stored in the engine control module (ECM) (signal too high / low) if the rear electronic module has registered an electrical fault in the fuel level sensor.
Diagnostic trouble code (DTC) ECM-4050 (signal missing) is stored if the engine control module (ECM) registers a communication problem with the central electronic module (CEM).
Diagnostic trouble code (DTC) ECM-4050 is stored in the engine control module (ECM) (faulty signal) if the engine control module (ECM) has registered a fuel consumption of more that 12 liters while the rear electronic module has registered that the fuel level has fallen by less than 2 liters.

Substitute value
None.

Possible source

Signal too high:
- electrical fault in the right fuel level sensor

Signal too low:
- electrical fault in the left fuel level sensor

Signal missing:
- communication fault

Faulty signal:
- defective fuel level sensor

Fault symptom[s]
- Gauges/Fuel level not accurate/Value too high
- Gauges/Fuel level not accurate/Value too low