how to fix Honda Civic 10th Generation (2016-2021) P0455 code

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Tools Required: OBD-II scanner, smoke machine, basic hand tools (sockets, wrenches), multimeter.
• Parts Required: New gas cap (if damaged), EVAP hoses (if cracked), purge valve (if faulty).
• Safety Warnings: Disconnect the battery before working on electrical systems.

2. Replace Gas Cap (if necessary)

1. Remove the existing gas cap by turning it counterclockwise.
2. Inspect the sealing surface on the filler neck for dirt or damage.
3. Install the new gas cap by turning it clockwise until you hear a click.

3. Repair or Replace EVAP Hoses

1. Locate the EVAP hoses connected to the charcoal canister and purge valve.
2. Use a socket or wrench to remove any clamps securing the hoses.
3. Inspect hoses for cracks or leaks; replace them as necessary.
   • Sub-steps: Cut the new hose to the required length, slide it over the fittings, and secure with clamps.

4. Replace Purge Valve (if faulty)

1. Disconnect the electrical connector from the purge valve.
2. Remove any fasteners securing the purge valve (if applicable).
3. Install the new purge valve by reversing the removal steps, ensuring it is securely fastened.
4. Reconnect the electrical connector.

5. Conduct a Smoke Test (if leaks are suspected)

1. Connect the smoke machine to the EVAP system through the service port.
2. Apply smoke and observe for any leaks in the system.
3. Identify and repair any leaks found during the test.