how to fix P0455 code on Volkswagen Golf MK5 (2004-2008)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery by removing the negative terminal.

2. Inspect and Replace Gas Cap

• Tools Required: None
• Inspect the gas cap for any cracks or damage; replace if necessary.
• Ensure that the gas cap clicks securely when reinstalled.

3. Inspect and Replace EVAP Hoses

• Tools Required: Pliers, screwdriver
• Remove any clamps holding the EVAP hoses in place.
• Inspect hoses for cracks or wear; replace any damaged hoses with OEM parts.
• Reattach hoses and clamps securely.

4. Perform Smoke Test

• Tools Required: Smoke machine
• Connect the smoke machine to the EVAP system at the purge valve location.
• Activate the smoke machine and look for smoke escaping from any leaks in the system.
• Repair any identified leaks by replacing affected components.

5. Check and Replace Purge Valve

• Tools Required: Socket set, multimeter
• Disconnect the electrical connector from the EVAP purge valve.
• Use a multimeter to test for continuity; replace the valve if it is faulty.
• Reinstall the new purge valve and reconnect the electrical connector.

6. Reassemble and Reconnect Battery

• Reconnect any components removed during the inspection and repair process.
• Reconnect the negative battery terminal.