how to fix a P0455 code on my Toyota Corolla E210 (2019-2024)

Learn how to diagnose and fix P0455 EVAP system leak in Toyota Corolla E210 (2019-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine off and cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Gas Cap

• Remove the gas cap by turning it counter-clockwise.
• Check the gas cap for any cracks or damages.
• If damaged, replace it with a new OEM gas cap.
• Reinstall the gas cap and ensure it clicks securely into place.

3. Inspect EVAP System Components

• Locate the EVAP canister and inspect it for damage.
• Check all hoses connected to the canister for cracks or loose connections.
• If any hoses are damaged, replace them with new hoses.
• Tighten any loose connections to ensure a proper seal.

4. Perform Smoke Test

• Connect a smoke machine to the EVAP system at the service port.
• Introduce smoke into the system and observe for any smoke escaping from leaks.
• If leaks are found, replace the affected components (hoses, canister, valves).

5. Check Purge and Vent Valves

• Disconnect the electrical connectors from the purge valve and vent valve.
• Use a multimeter to test the resistance of the valves; replace any that are not within specifications.
• Reinstall any replaced components and reconnect electrical connectors.

6. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0455 code from the ECU.
• Test drive the vehicle for at least 20 minutes to allow the system to monitor for any new codes.