how to fix the P0455 evaporative emission control system leak in Toyota Corolla E140 (2006-2013)

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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to avoid electrical issues.

Tools Required:

• OBD-II scanner
• Smoke machine
• Socket set
• Torque wrench
• Screwdrivers
• Multimeter

2. Inspect and Replace the Gas Cap

• Sub-steps:
  • Remove the gas cap by turning it counterclockwise.
  • Inspect the rubber gasket for wear or cracks.
  • If damaged, replace the gas cap with a new one.
  • Ensure the new gas cap clicks securely when installed.

3. Check and Replace Damaged Hoses

• Sub-steps:
  • Trace the EVAP hoses from the charcoal canister to the fuel tank.
  • Look for visible cracks, loose connections, or leaks.
  • Cut the damaged sections of the hose and replace with new hoses of the same diameter.
  • Secure all connections with appropriate clamps.

4. Inspect and Replace the Charcoal Canister

• Sub-steps:
  • Locate the charcoal canister, usually mounted near the fuel tank.
  • Disconnect the electrical connector and the hoses attached to the canister.
  • Remove the canister bolts using a socket set.
  • Install the new charcoal canister by reversing the removal steps.
  • Ensure that all connections are tight and secure.

5. Test the EVAP Purge Valve

• Sub-steps:
  • Locate the EVAP purge valve, typically found near the intake manifold.
  • Disconnect the electrical connector from the purge valve.
  • Using a multimeter, check for continuity; if there's no continuity, replace the valve.
  • Reconnect the electrical connector and hoses once validated.

6. Clear Codes and Test Drive

• Sub-steps:
  • Reconnect the negative battery terminal.
  • Use the OBD-II scanner to clear the P0455 code.
  • Start the engine and perform a test drive to ensure the check engine light does not reappear.