why does my Honda CR-V Fifth Generation (2017-2022) check engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Address Error Codes

• Use the OBD-II scanner to read error codes.
• Research specific codes to determine the corresponding issue (e.g., P0420 for catalytic converter efficiency).

3. Replace Faulty Components

• Gas Cap: If the gas cap is faulty, replace it with a new OEM or quality aftermarket cap.
• Spark Plugs: If misfire codes are present, replace spark plugs. Remove the ignition coil, unscrew the old spark plug, and install the new one to the manufacturer’s torque specifications (typically around 13 lb-ft).
• Oxygen Sensors: If codes indicate oxygen sensor issues, remove the old sensor using an O2 sensor socket and replace it with a new unit.

4. Inspect and Repair Vacuum Leaks

• Visually inspect vacuum hoses and connections for cracks or leaks.
• Replace any damaged hoses and ensure all connections are tight.

5. Clear Error Codes

• After repairs, reconnect the battery and use the OBD-II scanner to clear any error codes.
• Start the engine and allow it to idle to ensure the check engine light does not reappear.