DTC P0451: FTP Sensor Circuit Range/Performance Problem
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION )
- If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451
- Turn the ignition switch to ON (II)
- Clear the DTC with the HDS
- Start the engine, and let it idle for 1 minute
- 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
- Turn the ignition switch to LOCK (0)
- Replace the FTP sensor (see FTP SENSOR REPLACEMENT )
- Turn the ignition switch to ON (II)
- Reset the ECM/PCM with the HDS
- Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE )
- Start the engine, and let it idle for 1 minute
- Check for Temporary DTCs or 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
- 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 Temporary DTCs or 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