Diagnostic Aids

If DTC P0463 is also set, diagnose DTC before continuing. A stuck fuel tank level sensor may cause DTC P0461 to set. Check for a loose fuel tank baffle that may interfere with movement of fuel tank level sensor float. Check for a corroded or loose fuel tank level sensor chassis ground. An open in fuel tank level sensor circuit will indicate an empty fuel tank (zero percent fuel level). A short to ground in fuel tank level sensor circuit will indicate a full fuel tank (100 percent fuel level).

Check for a poor PCM electrical connection. An intermittent malfunction may be caused by a poor connection, rubbed-through wire insulation, or a wire broken inside insulation. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, or poor terminal-to-wire connections before component replacement.