The Onboard Diagnostics II (OBD-II) port will allow you to access your Hyundai Tucson’s internal computer for running tests and diagnostics.
That’s it! Within a few seconds, the scanner will provide you with a Diagnostic Trouble Code (DTC) to help you figure out why your car’s Check Engine light came on. All scanners are a little different, so be sure to follow your scan tool’s specific instructions to read the code properly.