how to fix P0455 code in Toyota Corolla E210 (2019-2024)

Learn how to diagnose and fix P0455 code in Toyota Corolla E210. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Replace the Gas Cap

• Remove the gas cap and visually inspect it for cracks, dirt, or wear.
• If damaged, replace it with a new OEM gas cap.
• Ensure it clicks securely when reattached.

3. Inspect and Repair EVAP Hoses

• Follow the EVAP system hoses from the fuel tank to the EVAP canister.
• Check for any signs of wear, cracks, or disconnections.
• Replace any damaged hoses with OEM parts. Use hose clamps if necessary.

4. Perform Smoke Test

• Connect a smoke machine to the EVAP service port.
• Introduce smoke into the system and observe for any visible leaks.
• Repair any leaks found, which may involve replacing connectors or valves.

5. Replace Faulty Components

• If the purge valve or vent valve fails the electrical test, remove and replace them.
  • Purge Valve Replacement:
    • Disconnect electrical connectors.
    • Remove mounting bolts and take out the old valve.
    • Install the new valve and reconnect the electrical connectors.
  • Vent Valve Replacement:
    • Access the vent valve, usually located near the EVAP canister.
    • Disconnect and remove it, then install the new valve.

6. Reassemble and Test

• Reconnect the negative battery terminal.
• Clear the P0455 code using the OBD-II scanner.
• Start the engine and allow it to reach operating temperature.
• Perform a test drive to ensure the check engine light does not return.