Car Tuning

Check this link right here http://www.totalcardiagnostics.com/ for more information on Car Tuning. The only way to know why your Check Engine light is on is to connect a scan tool or code reader to the 16-pin OBD II diagnostic connector under the instrument panel and read out the code. If you do not have a code reader or scan tool to do this yourself, you can take your car to an auto parts store for a free diagnosis (Autozone & Advance Auto are currently offering this).