Diagnostic Aids

Ensure that the fuel level is in the same range as the customer concern.
For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Refer to Fuel Level Specifications in order to verify the correct fuel level sender readings. The fuel level is available on the scan tool in the Fuel Tank Level Remaining (%) parameter in the PCM Enhanced EVAP Data list-gas only or in the Fuel Level Sensor (voltage) parameter in the Engine Data Fuel System display - 6.6L diesel only.