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.

Discover what an OBD2 scanner is and how to use it to diagnose and fix car problems before they escalate into major repairs.

If you decide to use a Wireless Code Reader that uses Bluetooth or Wi-Fi to link to the OBD-II port, you should download a car scanner app.

Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find the best for different situations.