DTC Troubleshooting

DTC Troubleshooting: P0451, P0451

DTC P0451:

FTP Sensor Circuit Range/Performance Problem

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
- If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451.

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.

3. Start the engine, and let it idle for 1 minute.

4. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES -

Go to step 5.

NO -

If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the ECM/PCM. If the screen indicates NOT COMPLETED, keep idling until a result comes on.

5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Replace the FTP sensor; without SH-AWD Service and Repair, with SH-AWD Service and Repair.

7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

8. Reset the ECM/PCM with the HDS.

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

10. Start the engine, and let it idle for 1 minute.

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

Is DTC P0451 indicated?

YES -

Check for poor connections or loose terminals at the FTP sensor and the ECM/PCM, then go to step 1.

NO -

Go to step 12.

12. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES -

Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 11, go to the indicated DTC's troubleshooting.

NO -

If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.