DTC P0451: FTP Sensor Circuit Range/Performance Problem

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. 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 HDS indicate FAILED?

YES -Go to step 5.

NO -If the HDS 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 HDS 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 HDS 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 HDS indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.