how to fix P0455 code in Honda Accord 10th Generation (2018-2022)

Learn how to diagnose and fix P0455 fuel system issue in Honda Accord 10th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is parked on a level surface.

2. Inspect and Replace Gas Cap

• Sub-steps:
  1. Remove the existing gas cap by turning it counterclockwise.
  2. Inspect the rubber gasket for cracks or wear.
  3. If necessary, replace with a new OEM gas cap.
  4. Reinstall the new gas cap by turning it clockwise until it clicks into place.

3. Inspect and Repair EVAP Hoses

• Sub-steps:
  1. Trace all EVAP hoses from the gas tank to the EVAP canister.
  2. Look for any signs of wear, cracking, or disconnections.
  3. Replace any damaged hoses with OEM parts, ensuring proper routing.
  4. Secure all connections to prevent leaks.

4. Test and Replace Purge Valve if Necessary

• Sub-steps:
  1. Locate the purge valve, typically mounted on or near the intake manifold.
  2. Disconnect the electrical connector and vacuum lines.
  3. Use a multimeter to check for proper resistance according to specifications.
  4. If faulty, replace the purge valve with an OEM part.
  5. Reconnect all hoses and the electrical connector.

5. Check and Replace Vent Valve if Necessary

• Sub-steps:
  1. Locate the vent valve, usually near the EVAP canister.
  2. Disconnect the electrical connector and vacuum lines.
  3. Test the vent valve for proper operation using a multimeter.
  4. Replace with an OEM vent valve if defective.
  5. Secure all connections before testing.