how to resolve the P0455 code on my Ford F-150 14th Generation (2021-2024)?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Allow the vehicle to cool if it has been running.

2. Inspect and Replace Gas Cap

• Remove the gas cap and inspect the rubber seal for cracks or wear.
• If damaged, replace with a new OEM gas cap.
• Reinstall the gas cap securely.

3. Repair or Replace EVAP Components

• EVAP Canister:
  • Locate the EVAP canister, usually found near the fuel tank.
  • Disconnect the electrical connectors and hoses.
  • Remove mounting bolts with a socket set and replace the canister if damaged.
• Purge Valve:
  • Locate the EVAP purge valve, typically in the engine bay.
  • Disconnect the electrical connector and hoses.
  • Test for continuity with a multimeter; replace if defective.

4. Smoke Test and Repair Leaks

• Use a smoke machine to introduce smoke into the EVAP system.
• Inspect for smoke escaping from any connections, hoses, or the fuel tank.
• Repair or replace any leaking components found during the smoke test.

5. Reset the System

• Reconnect the battery.
• Use the OBD-II scanner to clear the P0455 code.
• Start the engine and let it run for a few minutes to ensure the check engine light does not reappear.