why does my Honda Accord check engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical shorts.

2. Address Fault Codes

• Sub-step 1: Record the fault codes from the OBD-II scanner.
• Sub-step 2: Research the codes to identify specific issues (e.g., P0420 for catalytic converter efficiency).
• Sub-step 3: Clear the codes from the system and start the engine to see if the light returns.

3. Inspect and Replace Components

• Sub-step 1: If the gas cap is faulty, replace it with a new OEM part.
• Sub-step 2: If the air filter is dirty, remove it and install a new one.
• Sub-step 3: If spark plugs are worn, remove and replace them with appropriate OEM replacement parts, ensuring to use the correct gap specification.
• Sub-step 4: If fuel pressure is low, inspect the fuel pump and replace if necessary.

4. Final Checks

• Sub-step 1: Reconnect the battery and clear all fault codes again.
• Sub-step 2: Start the engine and allow it to idle, monitoring for any irregularities.
• Sub-step 3: Take the vehicle for a test drive to ensure the check engine light does not reappear.