why is my Honda Accord 10th Generation (2018-2022) check engine light on

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, torque wrench, vacuum gauge.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Retrieve and note any error codes displayed.
• Research the codes to understand potential issues (e.g., P0420 for catalytic converter efficiency).

3. Inspect and Replace Components

• Gas Cap:
  • Remove the gas cap, inspect for cracks or damage, and replace if necessary.
• Air Filter:
  • Remove the air filter housing cover using a socket set.
  • Take out the old air filter and install a new one.
• Spark Plugs:
  • Remove ignition coils (if applicable) and spark plugs using the socket set.
  • Inspect for wear and replace any faulty spark plugs.

4. Exhaust System Inspection

• Visually inspect the exhaust system for any signs of leaks or damage.
• If the catalytic converter is suspected, use a vacuum gauge to test its efficiency.
• Replace the catalytic converter if it fails the efficiency test.

5. Clear Codes and Test Drive

• Clear all error codes using the OBD-II scanner.
• Start the engine and take the vehicle for a test drive to monitor performance.