Troubleshooting Hints

The most likely causes for this code to be set are:

Fuel tank temperature sensor failed.
Open or shorted fuel tank temperature sensor circuit, or loose connector.
PCM failed.
The engine and the radiator have been flushed repeatedly when the engine coolant temperature was high (or the fuel tank temperature was high).

NOTE: A diagnostic trouble code (DTC) could be output if the engine coolant is changed as indicated above. Because this is not a failure, the DTC must be erased. Make sure to test drive the vehicle in accordance with the drive cycle pattern in order to verify that a DTC will not be output.