how to troubleshoot a P0455 code on my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and safety equipment.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Inspect and Replace the Fuel Cap

• Sub-steps:
  • Remove the existing fuel cap and inspect for cracks or damage.
  • If damaged, replace with a new fuel cap.
  • Ensure the new cap is tightened to the manufacturer's specifications.

3. Repair or Replace Damaged Hoses

• Sub-steps:
  • Identify any damaged hoses connected to the EVAP system during the visual inspection.
  • Use a socket set to disconnect the damaged hoses.
  • Replace with OEM or high-quality aftermarket hoses.
  • Reconnect hoses and ensure all clamps are secure.

4. Conduct Smoke Test

• Sub-steps:
  • Connect the smoke machine to the EVAP service port.
  • Introduce smoke and observe for any escaping from the EVAP system.
  • Identify and repair any leaks found in hoses, connections, or the charcoal canister.

5. Test and Replace EVAP Valves (if necessary)

• Sub-steps:
  • Disconnect the electrical connectors from the EVAP purge and vent valves.
  • Use a multimeter to test for continuity and proper operation.
  • Replace any malfunctioning valves with new OEM parts.
  • Reconnect the electrical connectors.