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.

Reading and understanding OBD2 trouble codes today couldn't be easier. This is partly because of tools like Innova's Digital CAN OBD2 Code Reader.

An OBD2 scanner that can read your vehicle’s trouble codes is a critical tool for DIYers. But even if you don’t like turning wrenches yourself, it’s hugely helpful to be able to get an idea of what’s ...