DTC P0451: FTP Sensor Circuit Range/Performance Problem

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

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 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 PCM with the HDS.
Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
Start the engine, and let it idle for 1 minute.
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 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 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 PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.