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2006 Ford Mustang Fuel System - MIL ON/DTC P0456 Stored

2006 Ford Mustang V6-4.0L VIN N

Fuel System - MIL ON/DTC P0456 Stored


2005-2006 Mustang


Some 2005-2006 Mustang vehicles may have a malfunction indicator lamp (MIL) on with diagnostic trouble code (DTC) P0456. This concern can be caused by an oversized orifice in the fuel pump. Suspect fuel pumps are in vehicles built before January 1, 2006.


Follow the Service Procedure steps to correct the condition.


Install the scan tool on the vehicle and monitor various inputs at different conditions to see if the vehicle needs to have the fuel pump replaced based on the calculation.

Mustang Vapor Generation Test

1. Install IDS and perform Data logger function.

2. Select the following PIDs: FLI% (fuel level), FRP (fuel rail pressure), VMV # (Vapor Management Valve current), FTP voltage (Fuel tank pressure transducer output voltage), CVV # (Canister vent valve duty cycle).

3. Start engine - run for 5 minutes - turn off engine. Download File PDF

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