how to fix the check engine light on Honda Accord 10th Generation (2018-2022) after repairs

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface.
• Disconnect the negative terminal of the battery to reset the ECU if necessary.

2. Inspect and Repair Connections

• Recheck any connectors or wiring related to the repairs.
  • Sub-steps:
    • Visually inspect all connections for corrosion or damage.
    • Ensure all connectors are seated properly.
    • If any are damaged, replace them with new connectors.

3. Repair Vacuum Leaks

• Check for any vacuum leaks that could cause the CEL to illuminate.
  • Sub-steps:
    • Use a smoke machine or spray carburetor cleaner around vacuum lines to identify leaks.
    • Replace any damaged vacuum hoses or seals.

4. Address Exhaust Leaks

• Inspect the exhaust system for leaks that may affect emissions readings.
  • Sub-steps:
    • Look for cracks or holes in the exhaust pipes and around the catalytic converter.
    • Repair or replace any damaged components as necessary.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal and clear any diagnostic trouble codes.
  • Sub-steps:
    • Start the vehicle and allow it to reach operating temperature.
    • Use the OBD-II scanner to clear codes and confirm the CEL is off.