1. Make sure the engine is off and the transmission is in Park.
2. Locate the diagnostic port under the dashboard, usually near the driver's side footwell. It's a small, rectangular port with a plastic cover.
3. Remove the cover from the diagnostic port.
4. Insert the key into the ignition and turn it to the "On" position without starting the engine.
5. Connect a scan tool or code reader to the diagnostic port.
6. Follow the prompts on the scan tool or code reader to navigate to the option to clear or reset the Check Engine light.
7. Select the option to clear the codes and confirm the action when prompted.
8. Turn the key to the "Off" position and remove it from the ignition.
9. Disconnect the scan tool or code reader from the diagnostic port.
10. Start the engine to verify that the Check Engine light has been reset.
If the Check Engine light comes back on after resetting it, it's important to have a qualified mechanic diagnose the underlying issue and address it before attempting to reset the light again.
