Diagnostic Trouble Code (DTC) Information ECM-4400
Condition
The rear electronic module (REM) transmits information about the fuel level and fault status of the fuel level sensor to the central electronic module (CEM). The central electronic module (CEM) then transmits this information on to the engine control module (ECM).
The engine control module (ECM) compares the engine fuel consumption with the change in fuel level over a set period of time. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers an implausibly small reduction in the fuel level compared with calculated fuel consumption.
Substitute Value
- None.
Possible Source
- Fault trace the rear electronic module (REM)
- Damaged fuel level sensor.
Fault symptom[s]
- Gauges/Fuel level not accurate/Value too low