Fuel Level Sensor: Description and Operation

The fuel level sensor input to the PCM is used to determine if the fuel level in the tank is correct to run the EVAP diagnostic tests (Refer to Evaporative Emissions System / Testing and Inspection / OBD II Evaporative Emission System Diagnostics).

To ensure sufficient volume in the tank to begin the various diagnostic tests, the fuel level must be between 15% and 85%. Refer to EVAP Control System Description for a complete description of the EVAP system. The PCM also sends the fuel level sensor information via Class 2 to the instrument Panel Cluster (IPC). The IPC controls the fuel level gauge.