how to fix P0455 code on my Honda Civic 11th Generation (2022-Present)?

Learn how to diagnose and fix P0455 large evaporative emissions system leak in Honda Civic 11th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery negative terminal to avoid any electrical issues.

2. Inspect and Replace Gas Cap

• Sub-steps:
  1. Remove the gas cap.
  2. Inspect for cracks, dirt, or damage.
  3. If damaged, replace the gas cap with a new one.
  4. Reinstall the gas cap securely.

3. Inspect and Replace EVAP Hoses

• Sub-steps:
  1. Locate the EVAP hoses connected to the canister and fuel tank.
  2. Check for cracks or signs of wear.
  3. If any hose is damaged, remove the old hose using a hose clamp tool.
  4. Install the new EVAP hose and secure it with the appropriate clamps.

4. Inspect and Replace EVAP Canister (if necessary)

• Sub-steps:
  1. Locate the EVAP canister.
  2. Remove any mounting bolts using a socket set.
  3. Disconnect the electrical connector and any hoses attached to the canister.
  4. Install the new canister by reversing the removal steps, ensuring all connections are secure.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the battery negative terminal.
  2. Use the OBD-II scanner to clear the P0455 code.
  3. Start the engine and allow it to reach operating temperature.