how to fix P0455 code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Gas Cap

• Remove the existing gas cap.
• Examine the O-ring and threads for wear or damage. If damaged, replace with a new gas cap.
• Ensure the new gas cap is tightened properly to create a seal.

3. Inspect EVAP Hoses and Connections

• Locate the EVAP hoses running from the fuel tank to the EVAP canister.
• Check for any visible signs of cracks or leaks.
• Replace any damaged hoses with new ones, ensuring secure connections at both ends.

4. Perform Smoke Test

• Connect a smoke machine to the EVAP system through the service port.
• Observe for any smoke escaping from the system, indicating a leak.
• If a leak is found, repair or replace the affected component (hoses, canister, etc.).

5. Check and Replace Purge Valve

• Locate the purge valve (usually near the intake manifold).
• Disconnect the electrical connector and vacuum lines.
• Test the valve with a multimeter for operation, or apply vacuum to check functionality.
• Replace the valve if it fails the test.

6. Reassemble and Clear Codes

• Reconnect all components and ensure everything is secured.
• Reconnect the battery.
• Use the OBD-II scanner to clear the P0455 code from the ECU.