P0463 OBD II Trouble Code Fuel Level Sensor Circuit High Input

Detailed information on troubleshooting and repairing a P0463 DTC code which has to do with high input of the fuel level sensor circuit. Also includes links to relevant forum topics on the code.

Symptoms of P0463 OBD II Trouble Code

  • Mil (Malfunction indicator lamp) illumination
  • Fuel level gauge may fluctuate abnormally or read empty or full
  • Fuel light may illuminate and sound alarm

Common Causes of P0463 OBD II Trouble Code

  • The signal circuit to the fuel sender is open or shorted to B+ (Battery voltage)
  • The ground circuit is open, or ground path may have high resistance due to rust or missing ground strap on fuel tank
  • Damage to the fuel tank could cause problem in fuel level circuit
  • There's an open in the fuel lever sensor's resistor to ground
  • Possibly faulty instrument cluster
  • Less likely is the possibility that the PCM, BCM, or Fuel pump computer module has failed