Fuel Gauge: Description and Operation

The PCM sends fuel level percent to the BCM via class 2. The IPC displays the fuel level as determined by the BCM. The IPC receives a class 2 message from the BCM indicating the fuel level percent. The engine coolant temperature gauge defaults to E (empty) if:
^ The PCM detects a malfunction in the fuel level sensor circuit.
^ The IPC detects a loss of class 2 communications with the PCM.

When the fuel level is less than 4 %, the low fuel indicator illuminates.