Fuel Warning Light Does Not Work

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.

With the ignition key on, the fuel reserve warning light does not come on when the tank enters the reserve level.

NOTE:

The message comes from the fuel level signal to the Body Control Module (BCM) and made available to the Instrument Panel Cluster (IPC) through the CAN-B network.

The BCM also sends a fuel level sensor error message.

1	CHECK WITH DIAGNOSTIC TOOL	Result OK	Result Not OK	Action
	Connect the diagnostic scan tool to the DLC. Verify the absence of anomalies in the BCM.	Continue to Step 2	Sensor with open circuit, sensor DC, value incongruent / implausible with actual fuel level	Proceed as indicated by the diagnostic tool
2	CHECK WITH DIAGNOSTIC TOOL	Result OK	Result Not OK	Action
	With the diagnostic scan tool, test the functionality of the fuel reserve light through active diagnosis.	Continue to Step 3	The light does not come on.	Replace instrument panel cluster
3	CHECK FUEL LEVEL SENSOR	Result OK	Result Not OK	Action
	Check the operation of the fuel level sensor	Continue to Step 4	Sensor not working.	Replace the fuel pump assembly
4	CHECK ELECTRICAL CIRCUIT	Result OK	Result Not OK	Action
	Check continuity / insulation of the circuits between the fuel level sensor and BCM.	Continue to Step 5	Circuit fault / not insulated.	Restore circuit continuity / insulation
5	CHECK PROPER OPERATION	Result OK	Result Not OK	Action
	Verify that the fault is no longer present	Diagnostic complete	Anomaly persists	Replace the Body Control Module