how to fix the P0455 code on my Volkswagen Golf MK7 (2015-2019)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is turned off.
• Disconnect the battery to avoid any electrical issues.

2. Inspect and Replace the Gas Cap

• Check the gas cap for any signs of wear or damage. Ensure it seals properly.
• If damaged, replace the gas cap with a new OEM part.
• Tighten the new gas cap until it clicks, ensuring a proper seal.

3. Inspect EVAP Hoses and Components

• Remove the undercarriage cover if necessary to access the EVAP system components.
• Visually inspect all hoses connected to the EVAP system for cracks or loose connections.
• If any hoses are damaged, replace them with new hoses that meet OEM specifications.

4. Check and Replace the Charcoal Canister (if necessary)

• Locate the charcoal canister, typically mounted near the fuel tank.
• Remove the canister by disconnecting the mounting bolts and electrical connectors.
• Inspect for any cracks or damage. If damaged, replace it with a new OEM charcoal canister.

5. Test and Replace the Purge Valve (if necessary)

• Locate the EVAP purge valve, typically found on or near the intake manifold.
• Disconnect the electrical connector and vacuum lines from the valve.
• Use a multimeter to test the valve's resistance; refer to the service manual for specifications.
• If the valve is defective, replace it with a new OEM purge valve.