DTC Troubleshooting: P0451

ElectronicCircuitSchematics-buttonADInfo-button DTC Advanced Diagnostics: P0451DTC P0451 : FTP Sensor Circuit Range/Performance Problem

NOTE:

Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems or How to Troubleshoot the Brake Booster Pressure Monitoring System .
If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0451 FTP Sensor Circuit Range/Performance Problem

DTC (PGM-FI)

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 .

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 - Refer to: How to Troubleshoot the Fuel and Emissions Systems or How to Troubleshoot the Brake Booster Pressure Monitoring System . If the HDS indicates NOT COMPLETED, keep idling until a result comes on.