how to diagnose a P0455 code on my Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather tools and parts before starting.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent electrical issues.

2. Inspect and Replace the Gas Cap

• Remove the gas cap and inspect for any damage or wear.
• If damaged, replace the gas cap with a new one (ensure it meets OEM specifications).
• Reinstall the gas cap securely.

3. Repair or Replace Damaged Components

• If any hoses or connectors are damaged, replace them:
  • Disconnect the damaged hose or connector.
  • Install the new component, ensuring a secure fit.
  • Use hose clamps if required.

4. Smoke Test the EVAP System

• Connect the smoke machine to the EVAP system through the service port.
• Activate the smoke machine and observe for smoke leaks.
• If leaks are found, repair the affected areas by sealing or replacing components.

5. Test the Purge Valve

• Disconnect the purge valve from the electrical connector.
• Apply 12 volts to the purge valve to check its operation; the valve should click and open.
• If it does not operate properly, replace the purge valve.