why is my Volkswagen Golf MK6 (2009-2014) showing a P0455 code?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is on a flat surface and engage the parking brake.
• Disconnect the battery to prevent electrical shorts.

2. Gas Cap Inspection and Replacement

• Remove the gas cap.
  • Inspect for cracks or a damaged seal; replace if necessary.
  • Ensure the replacement gas cap is the correct part for the MK6 Golf.

3. Inspect and Repair EVAP Hoses

• Locate the EVAP hoses connected to the fuel tank, canister, and engine.
• Disconnect each hose and visually inspect for cracks or wear.
• Replace any damaged hoses with OEM parts.
• Reattach all hoses securely.

4. Smoke Test for Leak Detection

• Connect a smoke machine to the EVAP system through the fuel filler neck or other ports.
• Observe for smoke escaping from any cracks or loose connections.
• Seal any identified leaks and repair or replace affected components as necessary.

5. Purge Valve and Vent Valve Testing

• Locate the purge valve and vent valve.
• Disconnect the electrical connectors and test each valve with a multimeter for continuity.
• Replace any faulty valves with OEM replacements.