how to fix P0455 code in Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Tools Required: OBD-II scanner, smoke machine, basic hand tools (sockets, wrenches), multimeter.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the vehicle to cool if it has been running.

2. Inspect and Repair EVAP System

1. Gas Cap Inspection

   • Remove the gas cap and inspect for cracks or damage.
   • Clean the gas cap sealing surface on the filler neck.
   • If damaged, replace with a new gas cap.

2. Hose and Connector Inspection

   • Inspect all hoses connected to the EVAP system for cracks or loose fittings.
   • Replace any damaged hoses or connectors as necessary.

3. Smoke Test

   • Connect the smoke machine to the EVAP system at the fuel filler neck.
   • Activate the smoke machine and look for smoke escaping from any leaks.
   • Seal any identified leaks with appropriate repairs (replace hoses or clamps).

4. Purge and Vent Valve Testing

   • Disconnect the electrical connectors from the purge and vent valves.
   • Use a multimeter to check for proper resistance and operation according to the service manual specifications.
   • Replace any malfunctioning valves.

5. Charcoal Canister Inspection

   • Inspect the charcoal canister for signs of damage or saturation.
   • If it appears damaged or clogged, replace the canister.

3. Reassemble Components

• Reconnect all hoses and electrical connectors.
• Ensure the gas cap is secured properly.