1. Locate the diagnostic port on your vehicle. The diagnostic port is a 16-pin female connector located under the dashboard, usually on the driver's side.
2. Connect a scan tool to the diagnostic port. A scan tool is a device that can communicate with your vehicle's onboard computer and retrieve information, such as check engine codes.
3. Turn on the ignition, but do not start the engine.
4. Follow the instructions provided by the scan tool to retrieve the check engine codes. Depending on the tool you're using, this process may vary.
5. Once the codes are displayed, you can look up their meanings using a code reader or online resource.
6. Use the information provided by the codes to troubleshoot and fix the problem with your vehicle.
Note: If you're not comfortable performing this task yourself, it's best to take your vehicle to a qualified mechanic or dealership.
