how to fix P0455 EVAP system leak in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure it with jack stands if necessary.

2. Inspect and Replace the Gas Cap

• Tools Required: None
• Inspect the gas cap for cracks or damage.
• If damaged, replace with a new gas cap and ensure it clicks securely when closed.

3. Inspect EVAP Hoses and Components

• Tools Required: Pliers, socket set
• Remove any necessary covers to access the EVAP system components.
• Visually inspect all hoses and connections for cracks or signs of wear. Replace any damaged hoses.
• Ensure all connections are tight.

4. Replace the EVAP Canister (if necessary)

• Tools Required: Socket set, ratchet
• Disconnect the electrical connector and hoses from the EVAP canister.
• Remove the mounting bolts and take the canister out.
• Install the new EVAP canister, reconnect hoses and electrical connectors, and secure it with bolts to manufacturer specifications.

5. Check and Replace Purge and Vent Valves (if necessary)

• Tools Required: Socket set, screwdriver
• Locate the purge valve and vent valve. Disconnect the electrical connectors and hoses.
• Remove and inspect the valves for proper operation.
• If faulty, replace them with new valves, ensuring all connections are secure.

6. Smoke Test and Final Checks

• Tools Required: Smoke machine (if available)
• Perform a smoke test again to ensure no leaks are present in the EVAP system.
• Reconnect the negative battery terminal.
• Clear the DTC using the OBD-II scanner.