P0463 Fuel Level Sending Unit Volts Too High

SYMPTOM
P-0463 FUEL LEVEL SENDING UNIT VOLTS TOO HIGH

WHEN MONITORED
Ignition on and battery voltage above 10.4 volts.

SET CONDITION
The fuel level sensor signal circuit voltage at the PCM goes above 9.4 volts for 2 seconds.

POSSIBLE CAUSES
- Fuel level sensor ground circuit open
- Fuel level sensor signal circuit open
- Fuel level sensor defective
- Fuel pump module wiring harness intermittent def
- Fuel pump module wiring harness observable def
- PCM defective (fuel level sending unit too high)