1. Locate the diagnostic port under the dashboard, usually near the driver's side kick panel.
2. Connect a compatible scan tool or code reader to the diagnostic port.
3. Turn the ignition key to the "ON" position but do not start the engine.
4. Follow the prompts on the scan tool or code reader to retrieve and read any stored diagnostic trouble codes (DTCs).
5. Once you have identified the DTCs, address the underlying problems or malfunctions causing the check engine light to illuminate. This may require repairs, replacements, or adjustments to various components in the vehicle's engine or emissions control system.
6. After resolving the issues and clearing the DTCs from the scan tool, the check engine light should turn off automatically once you start the engine.
7. If the check engine light persists after following these steps, it's recommended to seek assistance from a qualified mechanic or an authorized service center for further diagnostics and repairs.
Note that the check engine light may also turn off temporarily after disconnecting and reconnecting the vehicle's battery, but this is not a recommended method to reset it, as it does not address the underlying problems causing the light to illuminate.
