how to resolve the P0455 code in my Toyota Corolla E210 (2019-2024)

Learn how to diagnose and fix P0455 large leak in the EVAP system of your Toyota Corolla E210. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, smoke machine, multimeter, socket set, torque wrench, safety glasses, gloves.
• Disconnect the negative battery cable to ensure safety while working on electrical components.

2. Inspect and Replace Gas Cap

• Sub-steps:
  1. Remove the gas cap and inspect for cracks or damage.
  2. If damaged, replace with a new OEM gas cap.
  3. Reinstall the new gas cap and ensure it clicks into place.

3. Inspect EVAP Hoses

• Sub-steps:
  1. Locate the EVAP hoses connected to the gas tank and EVAP canister.
  2. Check for any signs of wear, cracks, or loose connections.
  3. Replace any damaged hoses with OEM parts and ensure all connections are secure.

4. Test and Replace EVAP Purge Valve

• Sub-steps:
  1. Locate the EVAP purge valve (typically near the intake manifold).
  2. Disconnect the electrical connector and vacuum lines from the valve.
  3. Use a multimeter to check for continuity and proper operation.
  4. If faulty, replace the purge valve with an OEM part.
  5. Reconnect all components securely.

5. Test the EVAP System for Leaks

• Sub-steps:
  1. Connect the smoke machine to the EVAP service port.
  2. Activate the smoke machine to introduce smoke into the system.
  3. Observe for any smoke escaping from the hoses, canister, or connections.
  4. Repair any leaks found during this test before moving forward.

6. Clear Codes and Recheck

• Sub-steps:
  1. Reconnect the negative battery cable.
  2. Use the OBD-II scanner to clear the P0455 code.
  3. Start the vehicle and allow it to reach operating temperature.
  4. Drive the vehicle for a short distance to see if the check engine light returns.