why does my Honda Civic 10th Generation (2016-2021) check engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts before starting the repair.
• Tools Required: OBD-II scanner, socket set, torque wrench, screwdrivers, multimeter.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Error Codes

• Sub-step 1: Using the OBD-II scanner, retrieve the error codes.
• Sub-step 2: Research the codes to determine the specific issue (e.g., P0420 for catalytic converter efficiency).
• Sub-step 3: Make note of any additional symptoms or related codes.

3. Repair or Replace Faulty Components

• Sub-step 1: If the gas cap is faulty, replace it with a new OEM gas cap.
• Sub-step 2: For misfiring issues, replace worn spark plugs and ignition coils.
• Sub-step 3: If air filter is clogged, remove and replace it with a new filter.
• Sub-step 4: If the issue involves the catalytic converter, assess its condition and replace if necessary.

4. Clear Codes and Test

• Sub-step 1: After repairs, use the OBD-II scanner to clear any error codes.
• Sub-step 2: Start the engine and let it reach operating temperature.
• Sub-step 3: Check for the return of the check engine light after a short test drive.