Circuit DescriptionThe fuel level sensor is used to monitor the amount of diesel fuel in the vehicle’s fuel tank(s).

Component LocationThe fuel level sensor is an OEM component. Refer to the OEM service manual for component location.

Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.

Conditions for Setting the Fault CodesThe Engine Control Module (ECM) detected the fuel level sensor signal voltage was out of range high.

Action Taken When the Fault Code is ActiveThe ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.Conditions for Clearing the Fault CodeTo validate the repair, start the engine and let it idle for 1 minute.The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop TalkPossible causes of this fault code include:

A short circuit to battery in the OEM harnessA malfunctioning fuel level sensor

Possible Cause:1) OEM harness2) ECM failure