DTC P0451

DTC P0451  : FTP Sensor Circuit Range/Performance Problem

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• 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.

   -4. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle for 1 minute.

   -5. 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 .

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