how to deal with the P0455 code in my Volkswagen Golf MK6 (2009-2014)?

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the vehicle's battery to prevent any electrical shorts during repairs.

2. Inspect and Replace Gas Cap

• Sub-steps:
  • Remove the gas cap and inspect for damage.
  • Clean the sealing surface on the filler neck.
  • If damaged, replace the gas cap with a new OEM or equivalent part.

3. Repair or Replace EVAP Hoses

• Sub-steps:
  • Identify any damaged or cracked hoses during the visual inspection.
  • Use a hose clamp or replace the affected hoses as necessary.
  • Ensure all connections are tight and secure.

4. Locate and Repair Leaks

• Sub-steps:
  • Connect the smoke machine to the EVAP system at the fuel filler neck.
  • Activate the smoke machine and observe for any smoke escaping from leaks.
  • Seal any leaks found using appropriate sealant or replace the faulty components.

5. Test EVAP Valves

• Sub-steps:
  • Disconnect the wiring harness from the EVAP purge valve and vent valve.
  • Use a multimeter to check for resistance within manufacturer specifications.
  • Replace any valves that are found to be faulty.

6. Reassemble and Clear Codes

• Sub-steps:
  • Reconnect any disconnected components and ensure all connections are secure.
  • Reconnect the battery.
  • Start the engine and use the OBD-II scanner to clear the P0455 code.