P0463 HIGH VOLTAGE DETECTED AT THE FUEL LEVEL SENSOR
When Monitored and Set Condition:
When Monitored: Ignition on and battery voltage above 10.4 volts.
Set Condition: The signal voltage from the sensor goes above a calibrated value for a calibrated amount of time.
POSSIBLE CAUSES
- FUEL LEVEL SENSOR
- (G8) SIGNAL CIRCUIT SHORTED TO GROUND
- INTERMITTENT CONDITION
- ECM
DIAGNOSTIC PROCEDURE
-
Disconnect the ECM harness connectors. Disconnect the Fuel level sensor harness connector. Check connectors - Clean/repair as necessary. Measure the resistance of the Fuel level sensor across the (G8) signal circuit and return (K4) circuit. Is the resistance less than 10 ohms?
Yes --> Go To 2
No --> Replace the Fuel level sensor. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). -
Measure the resistance between the (G8) signal circuit in the sensor harness connector and battery negative. Is the resistance less than 10 Ohms?
Yes --> Repair the (G8) signal circuit shorted to ground. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No --> Go To 3 -
Reconnect the ECM harness connector. While monitoring with the DRBIII®, disconnect the Fuel level sensor harness connector. Did the DTC P0462 set?
Yes --> Test Complete.
No --> Replace the ECM. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).