To use it, just plug the TopScan into the OBD2 port of your vehicle and open the TopScan app on your phone. You can use the TopScan to clear fault codes, but it does a whole lot more than that.

Discover what an OBD2 scanner is and how to use it to diagnose and fix car problems before they escalate into major repairs. Your check engine light can come on a host of reasons, ranging from a ...

This is one of the only, if not the only CarPlay compatible OBD scanner apps on the App Store. Get The Drive’s daily newsletter The latest car news, reviews, and features. Search for: ...

5. If you have a basic OBD2 scanner, you may only see a code, such as P0171 or P0456, and nothing else on the display. In this case, you will need to do some research to find out what the code means.