why does my Honda Accord 10th Generation (2018-2022) check engine light keep coming on?

Solution

1. Preparation

• Gather tools and parts required for repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Address Error Codes

• Use the OBD-II scanner to retrieve and document error codes.
• Research the specific codes to identify potential issues (e.g., P0420 for catalytic converter efficiency).

3. Inspect and Replace Components

• Gas Cap:

  • Remove and inspect the gas cap for cracks or damage.
  • Clean the sealing surface on the filler neck.
  • Replace with a new gas cap if damaged.

• Spark Plugs and Ignition Coils:

  • Remove ignition coils and spark plugs using a socket set.
  • Inspect spark plugs for wear and carbon buildup; replace if necessary.
  • Check ignition coils for proper operation; replace any faulty coils.

• Fluid Levels:

  • Check engine oil, transmission fluid, and coolant levels.
  • Top off or replace fluids as necessary.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the error codes from the system.

5. Test Drive

• Perform a test drive to ensure the check engine light remains off and the vehicle operates smoothly.