Diagnostic Aids
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure that the fuel level is in the same range as the customer concern.
- For intermittent diagnosis, refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.
- Refer to See Figure in order to verify the correct fuel level sensor readings. The Fuel Tank Level Remaining (%) parameter is available on the scan tool in the PCM Enhanced EVAP data list.
IMPORTANT:
When inspecting for a deformed or warped fuel tank, measure the resistance of the suspect fuel level sensor at empty, with the sensor in the fuel tank, and again with the sensor removed from the fuel tank. The measured resistance values should be the same at empty. If the measured resistance values are not the same, refer to FUEL TANKS (WITH FEEDBACK FUEL SYSTEM)
or
or FUEL TANKS (WITHOUT FEEDBACK FUEL SYSTEM)
in Engine Performance.