DTC Troubleshooting
DTC P0462: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Low VoltageNOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS, and wait for 5 seconds.
3. Check for Temporary DTCs or 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, the fuel gauge sending unit, and the secondary fuel gauge sending unit.
4. Turn the ignition switch OFF.
5. Remove the rear seat cushion.
6. Remove the access panel from the right side of the floor.
7. Disconnect the secondary fuel gauge sending unit 5P connector.
8. Turn the ignition switch ON (II).
9. Clear the DTC with the HDS, and wait for 5 seconds.
10. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0463 indicated?
YES - Check for secondary fuel gauge sending unit, then Go to step 31.
NO- Go to step 11.
11. Turn the ignition switch OFF.
12. Remove the access panel from the left side of the floor.
13. Disconnect the fuel pump 5P connector.
14. Turn the ignition switch ON (II).
15. Clear the DTC with the HDS, and wait for 5 seconds.
16. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0463 indicated?
YES - Go to step 17.
NO - Go to step 21.
17. Turn the ignition switch OFF.
18. Remove the gauge control module.
19. Disconnect the gauge control module connector A (20P).
20. Check for continuity between fuel tank unit 5P connector terminal No. 2 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 31.
NO - Go to step 23.
21. Turn the ignition switch OFF.
22. Check for continuity between fuel tank unit 5P connector terminal No. 1 and body ground.
Is there continuity?
YES - Repair short in the wire between the fuel tank unit and the secondary fuel gauge sending unit, then Go to step 31.
NO - Check for fuel gauge sending unit.
23. Reconnect the gauge control module connector A (20P).
24. Remove the fuel tank unit and the secondary fuel gauge sending unit.
25. Connect the fuel tank unit and secondary fuel gauge sending unit 5P connector.
26. Turn the ignition switch ON (II).
27. Clear the DTC with the HDS.
28. Set the float (A) to the E position.
29. Check the fuel gauge.
Does the gauge move to the empty position?
YES - Go to step 37.
NO - Replace the gauge control module, then Go to step 30.
30. Turn the ignition switch OFF.
31. Reconnect all connectors.
32. Install the parts in the reverse order of removal.
33. Turn the ignition switch ON (II).
34. Reset the PCM with the HDS.
35. Do the PCM idle learn procedure.
36. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0462 indicated?
YES - Check for poor connections or loose terminals at the gauge control module, the fuel gauge sending unit, and the secondary fuel gauge sending unit, then Go to step 1.
NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.
37. Update the PCM if it does not have the latest software, or substitute a known good PCM.
38. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0462 indicated?
YES - Check for poor connections or loose terminals at the gauge control module, the fuel gauge sending unit, and the secondary fuel gauge sending unit. If the PCM was updated, substitute a known good PCM, then recheck. If the PCM was substituted, Go to step 1.
NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.