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

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure with wheel chocks.

2. Inspect and Replace Gas Cap

• Remove the gas cap and visually inspect for cracks or wear.
• If damaged, replace with a new OEM gas cap.
• Tighten the new gas cap until it clicks.

3. Inspect and Repair EVAP Hoses

• Locate the EVAP hoses and visually inspect for any signs of wear or damage.
• Use a multimeter to test for continuity in electrical connections if applicable.
• Replace any damaged hoses with OEM replacements, ensuring a secure fit.

4. Perform Smoke Test

• Connect the smoke machine to the EVAP service port.
• Activate the smoke machine and observe the system for smoke leaks.
• Identify and repair any leaks found by replacing affected components.

5. Check and Replace Purge Valve

• Locate the purge valve (near the intake manifold).
• Disconnect the electrical connector and remove the purge valve from its mounting.
• Test the valve for functionality by applying voltage and observing its operation.
• Replace with a new valve if it's malfunctioning.

6. Reassemble and Reset

• Reconnect all components, ensuring all connections are secure.
• Reconnect the negative battery terminal.
• Clear the P0455 code using the OBD-II scanner.