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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is on a flat surface and the engine is off.
• Disconnect the battery to avoid any electrical shorts.

2. Inspect and Replace Gas Cap

• Tools Required: None specifically for this step.
• If the gas cap is damaged or not sealing properly, replace it with a new OEM or high-quality aftermarket cap.

3. Inspect and Replace EVAP Hoses

• Tools Required: Pliers, socket set.
• Check all EVAP hoses for wear and tear. Replace any damaged hoses.
  • Sub-steps:
    • Remove the clips holding the hoses in place.
    • Replace with new hoses and secure with clips.

4. Test and Replace Purge and Vent Valves

• Tools Required: Multimeter, socket set, pliers.
• Test the purge valve:
  • Disconnect the electrical connector and use a multimeter to check for continuity.
  • If defective, replace it.
• Test the vent valve similarly. If not functioning, replace it.

5. Inspect and Replace Charcoal Canister

• Tools Required: Socket set, pliers, possibly a wrench.
• Remove the charcoal canister:
  • Disconnect vacuum lines and electrical connectors.
  • Unbolt the canister from its mount.
• Replace with a new charcoal canister if damaged or clogged.

6. Clear Codes and Reconnect Battery

• Tools Required: OBD-II scanner.
• Clear the P0455 code using an OBD-II scanner and reconnect the battery.