how to fix P0455 code on my Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Gas Cap

• Sub-steps:
  1. Remove the gas cap and inspect the rubber seal for cracks or damage.
  2. If damaged, replace with a new gas cap that meets OEM specifications.
• Tools Required: None specific for gas cap replacement.

3. Inspect EVAP Hoses and Components

• Sub-steps:
  1. Visually inspect all EVAP hoses for cracks, frays, or loose connections.
  2. Tighten any loose connections and replace damaged hoses as necessary.
• Tools Required: Pliers or hose clamps if needed for securing hoses.

4. Perform Smoke Test

• Sub-steps:
  1. Connect a smoke machine to the EVAP service port.
  2. Activate the smoke machine and check for smoke escaping from any leaks in the system.
  3. Repair or replace any leaking components identified during the test.
• Tools Required: Smoke machine.

5. Inspect and Test EVAP Purge Valve and Vent Valve

• Sub-steps:
  1. Disconnect electrical connectors from both the purge valve and vent valve.
  2. Use a multimeter to test for functionality (should have continuity when activated).
  3. Replace any faulty valves with new units.
• Tools Required: Multimeter and socket set.

6. Reassemble and Clear Codes

• Sub-steps:
  1. Reconnect any electrical connectors removed during inspection.
  2. Reconnect the negative battery terminal.
  3. Use an OBD-II scanner to clear the P0455 code from the system.
• Tools Required: OBD-II scanner.