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Home >> Dodge and Ram >> 2002 >> Durango R/T, 5.9 Z >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - NGC >> Diagnostic Tests >> DTC P0462: Fuel Level Sensor #1 Low >> Testing

DTC P0462: Fuel Level Sensor #1 Low: Testing

  1. Turn the ignition on, with the engine off. With the DRBIII(R), read DTCs and record the related Freeze Frame data. With the DRBIII(R), read the Fuel Level Sensor voltage. Is the Fuel Level Sensor voltage less than 0.4 volt? If yes, go to next step. If no, see INTERMITTENT FAILURES  under ON-BOARD DIAGNOSTICS.
  2. Turn the ignition off. Disconnect the Fuel Pump Module harness connector. Turn the ignition on, with the engine off. With the DRBIII(R), read the Fuel Level Sensor voltage. Did the Fuel Level Sensor voltage change from less than 0.4 volt to more than 4.0 volts? If yes, replace the Fuel Level Sensor. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. If no, go to next step.
  3. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance between ground and the Fuel Level Sensor Signal circuit in the Fuel Level Sensor harness connector. Is the resistance less than 100 ohms? If yes, repair the short to ground in the Fuel Level Sensor Signal circuit. If no, go to next step.
  4. Measure the resistance between the Fuel Level Sensor Signal circuit and the Sensor Ground circuit in the Fuel Pump Module harness connector. Is the resistance less than 5.0 ohms? If yes, repair the short to the Sensor Ground in the Fuel Level Sensor Signal circuit. If no, go to next step.
    5. NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push-out. Repair as necessary.
  5. There are no possible causes remaining, replace the PCM.
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