how to fix P0455 code in BMW X3 G01 (2018-2024)

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and securely lifted if necessary.

2. Inspect and Replace Gas Cap

• Remove the gas cap and inspect the O-ring for any wear or damage.
• If damaged, replace the gas cap with a new one (ensure it fits the BMW X3 specifications).
• Reinstall the gas cap securely and ensure it clicks into place.

3. Check and Replace EVAP Hoses

• Locate the EVAP hoses running from the fuel tank to the EVAP canister.
• Inspect each hose for cracks or loose fittings.
• If any hose is damaged or cracked, replace it with a new OEM hose.
• Ensure all connections are tight and secure.

4. Test and Replace Purge Valve

• Locate the EVAP purge valve near the intake manifold.
• Disconnect the electrical connector and use a multimeter to check for continuity.
• If faulty, replace the purge valve with a new one.
• Reconnect the electrical connector and ensure it is secure.

5. Perform Smoke Test

• Connect a smoke machine to the EVAP service port.
• Introduce smoke into the system and inspect for leaks.
• If any leaks are detected, repair or replace the leaking components.

6. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0455 code.
• Take the vehicle for a test drive to ensure the check engine light does not return.