DTC Troubleshooting

DTC Troubleshooting: P0462

DTC P0462: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS, and wait 5 seconds.

3. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0462 indicated?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module and the fuel gauge sending unit.


4. Turn the ignition switch to LOCK (0).

5. Remove the access panel from the floor. Fuel Tank Unit Removal and Installation

6. Disconnect the fuel tank unit 4P connector.

7. Turn the ignition switch to ON (II).

8. Clear the DTC with the HDS, and wait 5 seconds.

9. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0463 indicated?
YES - Replace the fuel gauge sending unit, Fuel Pump/Fuel Gauge Sending Unit Replacement then go to step 22.

NO - Go to step 10.


10. Measure the voltage between fuel tank unit 4P connector terminal No. 1 and body ground.

Is there battery voltage?
YES - Go to step 15.

NO - Go to step 11.






11. Turn the ignition switch to LOCK (0).

12. Remove the gauge control module. Service and Repair

13. Disconnect the gauge control module 32P connector.

14. Check for continuity between fuel tank unit 4P connector terminal No. 1 and body ground.

Is there continuity?
YES - Repair short in the wire between the gauge control module (signal line) and the fuel gauge sending unit, then go to step 23.

NO - Replace the gauge control module, Service and Repair then go to step 23.






15. Turn the ignition switch to LOCK (0).

16. Remove the fuel tank unit. Fuel Tank Unit Removal and Installation

17. Connect the fuel tank unit 4P connector.

18. Turn the ignition switch to ON (II).

19. Clear the DTC with the HDS.

20. Set the float (A) to the E position.

21. Check the fuel gauge.

Does the gauge move to the empty position?
YES - Go to step 29.

NO - Replace the gauge control module, Service and Repair then go to step 22.






22. Turn the ignition switch to LOCK (0).

23. Reconnect all connectors.

24. Install the parts in the reverse order of removal.

25. Turn the ignition switch to ON (II).

26. Reset the ECM/PCM with the HDS.

27. Do the ECM/PCM idle learn procedure. ECM/PCM Idle Learn Procedure

28. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0462 indicated?
YES - Check for poor connections or loose terminals at the gauge control module and the fuel gauge sending unit, then go to step 1.

NO - Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.


29. Turn the ignition switch to LOCK (0).

30. Reconnect all connectors.

31. Install the parts in the reverse order of removal.

32. Update the ECM/PCM if it does not have the latest software, ECM/PCM Update or substitute a known-good ECM/PCM. Initial Inspection and Diagnostic Overview

33. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0462 indicated?
YES - Check for poor connections or loose terminals at the gauge control module and the fuel gauge sending unit. If the ECM/PCM was updated, substitute a known-good ECM/PCM, Initial Inspection and Diagnostic Overview then recheck. If the ECM/PCM was substituted, go to step 1.

NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. Service and Repair If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.