how to fix P0455 EVAP leak code in Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the vehicle battery to ensure safety.
• Ensure the vehicle is on a level surface and raise it if necessary.

2. Inspect and Replace Fuel Cap

• Tools Required: None
• Check the fuel cap for cracks or damage.
• If damaged, replace it with a new OEM fuel cap.

3. Inspect and Replace EVAP Hoses

• Tools Required: Pliers, socket set
• Remove any clips or clamps securing the EVAP hoses.
• Inspect all hoses for leaks or cracks; replace if necessary with OEM parts.
• Reattach hoses securely, ensuring a tight fit.

4. Perform Smoke Test

• Tools Required: Smoke machine
• Connect the smoke machine to the EVAP service port.
• Activate the smoke machine and observe for any smoke escaping from the system, indicating a leak.
• Repair or replace the identified leaking component.

5. Replace EVAP Purge Valve (if faulty)

• Tools Required: Socket set, screwdrivers
• Locate the EVAP purge valve, typically found near the intake manifold or EVAP canister.
• Disconnect the electrical connector and vacuum lines from the valve.
• Remove the valve from its mounting.
• Install the new EVAP purge valve and reconnect electrical connections and vacuum lines.

6. Clear Codes and Recheck

• Tools Required: OBD-II scanner
• Reconnect the battery.
• Use the OBD-II scanner to clear the codes.
• Start the vehicle and allow it to reach operating temperature.