how to fix the P0455 code on my Toyota Corolla E140 (2006-2013)

Learn how to diagnose and fix P0455 EVAP system leak in Toyota Corolla E140 (2006-2013). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, smoke machine, basic hand tools.
• Ensure the vehicle is parked on a flat surface and the ignition is turned off.
• Disconnect the battery negative terminal to ensure safety.

2. Inspect and Replace Gas Cap

• Sub-steps:
  1. Remove the gas cap and inspect for cracks or a damaged rubber seal.
  2. If damaged, replace with a new OEM or quality aftermarket gas cap.
  3. Reattach the gas cap and ensure it clicks securely.

3. Inspect EVAP Hoses and Canister

• Sub-steps:
  1. Visually inspect all EVAP hoses for cracks or loose connections.
  2. If any hose appears damaged, remove it using basic hand tools and replace with new hose of the same diameter.
  3. Inspect the EVAP canister for any signs of damage or blockage. Replace the canister if needed.

4. Test Purge Valve and Vent Valve

• Sub-steps:
  1. Locate the purge valve and vent valve. Disconnect their electrical connectors.
  2. Use a multimeter to check for continuity and proper operation according to manufacturer specifications.
  3. Replace any valve that tests faulty or does not function correctly.

5. Perform Smoke Test

• Sub-steps:
  1. Connect the smoke machine to the EVAP system via the service port.
  2. Activate the machine and observe for smoke escaping from any leaks.
  3. Repair any identified leaks, replacing faulty components as necessary.

6. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the battery terminal and use the OBD-II scanner to clear the P0455 code.
  2. Start the vehicle and conduct a test drive to ensure no codes reappear.