how to fix P0455 EVAP leak code in Toyota Corolla E140 (2006-2013)

Learn how to diagnose and fix P0455 EVAP leak in Toyota Corolla E140 (2006-2013). 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 and the engine is off.
• Disconnect the negative battery terminal to prevent electrical hazards.

2. Inspect and Replace the Gas Cap

• Tools Required: None
• Remove the gas cap and inspect the rubber seal for cracks or wear.
• If damaged, replace the gas cap with an OEM or equivalent part.
• Reinstall the gas cap and ensure it clicks securely.

3. Inspect EVAP Components

• Tools Required: Screwdriver, flashlight
• Visually inspect the EVAP canister located under the vehicle, usually near the fuel tank.
• Check all hoses leading to and from the canister for cracks or loose connections.
• Replace any damaged hoses or the canister if necessary.

4. Perform a Smoke Test

• Tools Required: Smoke machine
• Connect the smoke machine to the EVAP system at the purge valve or the canister vent.
• Activate the smoke machine and observe for smoke escaping from any cracks or holes.
• Seal any identified leaks with appropriate materials or replace damaged components.

5. Test EVAP Valves

• Tools Required: Multimeter
• Locate the purge valve and vent valve, usually found near the intake manifold and fuel tank respectively.
• Disconnect the electrical connectors and test for continuity with a multimeter.
• Replace any faulty valves as needed.

6. Clear Codes and Recheck

• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0455 code.
• Start the vehicle and allow it to reach operating temperature.
• Monitor for any reoccurrence of the check engine light.