DTC P0451: FTP Sensor Circuit Range/Performance Problem (V6)

NOTE: 

• Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System) or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
• If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451.

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to 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.

   DTC Description	OBD STATUS
   P0451 FTP Sensor Circuit Range/Performance Problem

   Does the HDS indicate FAILED?

   YES 

   The failure is duplicated. Replace the FTP sensor - Refer to: FTP Sensor Removal and Installation (With SH-AWD) or FTP Sensor Removal and Installation (Without SH-AWD) .

   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 freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.