Ensure the issue causing the check engine light has been addressed: Before resetting the light, make sure that the underlying cause of the issue has been resolved. This may involve repairs or maintenance to the vehicle.
Find the OBD-II port: The OBD-II port, also known as the diagnostic port, is usually located under the dashboard, near the driver's seat. It is a 16-pin connector.
Connect an OBD-II scanner: Use an OBD-II scanner to connect to the vehicle's computer system. These scanners are available at automotive parts stores or online.
Turn on the ignition: Turn the ignition key to the "ON" position without starting the engine. This will power up the vehicle's computer system and allow the scanner to communicate with it.
Run a scan: Use the scanner to scan the vehicle's computer system for any stored diagnostic trouble codes (DTCs). These codes indicate the issues detected by the vehicle's sensors and modules.
Clear the codes: Once the scan is complete, select the option to clear or erase the DTCs from the scanner's menu. This will reset the check engine light.
Turn off the ignition: Turn the ignition key back to the "OFF" position.
Re-start the engine: Start the engine and let it run for a few minutes. If the check engine light does not come back on, the reset has been successful.
Note: If the check engine light comes back on after resetting, it indicates that the underlying issue persists or a new problem has occurred. In this case, it's recommended to have the vehicle diagnosed by a qualified mechanic to identify and fix the root cause of the issue.
