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

Learn how to diagnose and fix P0455 EVAP system leak in Toyota Corolla E210 (2019-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace the Gas Cap

• Sub-steps:
  • Remove the gas cap and visually inspect it for cracks or damage.
  • If damaged, replace it with a new gas cap that meets OEM specifications.
  • Reinstall the gas cap securely and reconnect the battery terminal.

3. Inspect and Replace Damaged EVAP Hoses

• Sub-steps:
  • Locate the EVAP hoses connected to the fuel tank, charcoal canister, and purge valve.
  • Carefully remove any damaged hoses using pliers if necessary.
  • Install new hoses, ensuring they are clamped securely and free of kinks.

4. Test and Replace EVAP Purge and Vent Valves

• Sub-steps:
  • Disconnect the wiring harness from the purge and vent valves.
  • Use a multimeter to test the resistance and ensure they are functioning correctly.
  • If either valve is faulty, replace it with a new component.

5. Leak Testing

• Sub-steps:
  • Reconnect all components and perform a smoke test to verify that there are no leaks.
  • If leaks are detected, locate and repair or replace the affected component.

6. Clear Codes and Test Drive

• Sub-steps:
  • Use the OBD-II scanner to clear the P0455 code from the vehicle’s computer.
  • Start the engine and conduct a test drive to ensure the check engine light does not reappear.

Tools Required:

• OBD-II scanner
• Smoke machine or vacuum pressure tester
• Socket set
• Pliers
• Multimeter

Parts Required:

• New gas cap (if damaged)
• Replacement EVAP hoses (if needed)
• New EVAP purge valve (if defective)
• New EVAP vent valve (if defective)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical components.
• Allow the engine to cool before handling any parts.