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  • P0463 High Voltage Detected At THe Fuel Level Sensor

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    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

    1. 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).
    2. 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
    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).

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