Cavalier L4-2.2L VIN F (2004)
Fuel Gauge: Description and Operation
FUEL GAUGE
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 fuel gage defaults to E (empty) if:
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The PCM detects a malfunction in the fuel level sensor circuit.
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The IPC detects a loss of class 2 communications with the BCM.
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The BCM detects a loss of class 2 communications with the PCM.
When the fuel level is less than 4%, the CHECK GAGES indicator illuminates.
