how to fix P0455 code on Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Inspect and Replace Gas Cap

• Remove the gas cap and inspect for cracks or wear.
• If damaged, replace with a new OEM or quality aftermarket gas cap.
• Reinstall the gas cap and ensure it clicks securely.

3. Inspect EVAP Hoses and Lines

• Locate the EVAP hoses connected to the fuel tank, charcoal canister, and purge valve.
• Check for any visible damage, wear, or loose connections.
• Replace any damaged hoses with OEM specified parts.

4. Perform Smoke Test

• Connect a smoke machine to the EVAP system using the service port.
• Introduce smoke and visually inspect for smoke escaping from any leaks.
• If leaks are found, repair or replace the affected components (e.g., hoses, canister).

5. Test EVAP Purge Valve

• Locate the EVAP purge valve (usually near the intake manifold).
• Disconnect the electrical connector and apply 12V power to the valve to check if it opens.
• If it does not open, replace the purge valve with an OEM part.

6. Reassemble and Clear Codes

• Reconnect all components and hoses removed during inspection.
• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0455 code.