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), or press the engine start/stop button to select the ON mode.
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), or press the engine start/stop button to select the OFF mode.
5. Remove the rear seat cushion.
6. Remove the access panel from the floor.
7. Disconnect the fuel tank unit 4P connector.
8. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
9. Clear the DTC with the HDS, and wait 5 seconds.
10. 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 23.
NO -
Go to step 11.
11. Measure the voltage between fuel tank unit 4P connector terminal No. 1 and body ground.
Is there battery voltage?
YES -
Go to step 16.
NO -
Go to step 12.
12. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
13. Remove the gauge control module Service and Repair.
14. Disconnect the gauge control module connector A (32P).
15. Check for continuity between fuel tank unit 4P connector terminal No. 1 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the gauge control module (signal line) and the fuel gauge sending unit, then go to step 25.
NO -
Replace the gauge control module Service and Repair, then go to step 25.
16. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
17. Remove the fuel tank unit.
18. Connect the fuel tank unit 4P connector.
19. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
20. Clear the DTC with the HDS.
21. Set the float (A) to the E position.
22. Check the fuel gauge.
Does the fuel gauge move to the empty position?
YES -
Go to step 30.
NO -
Replace the gauge control module Service and Repair, then go to step 23.
23. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
24. Reinstall all removed parts in the reverse order of removal.
25. Reconnect all connectors.
26. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
27. Reset the PCM with the HDS.
28. Do the PCM idle learn procedure PCM Idle Learn Procedure.
29. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0462 indicated?
YES -
Check for poor connections or loose terminals at the fuel gauge sending unit and the gauge control module, 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.�
30. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
31. Reinstall all removed parts in the reverse order of removal.
32. Reconnect all connectors.
33. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
34. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0462 indicated?
YES -
Check for poor connections or loose terminals at the fuel gauge sending unit and the gauge control module. 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 Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�