Fuel Gauge: Description and Operation

FUEL GAGE

The instrument panel cluster (IPC) displays the fuel level as determined by the powertrain control module (PCM)/engine control module (ECM). The IPC receives a class 2 message from the ECM/PCM indicating the fuel level percent. The fuel gage defaults to empty (E) if:
- The PCM/ECM detects a malfunction in the fuel level sensor circuit.
- The IPC detects a loss of class 2 communications with the ECM/PCM.

When the fuel level is less than a certain low percentage, LOW FUEL message displays in the driver information center (DIC).