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.

A quick way to precisely diagnose myriad automotive problems—or at the very least get a rough idea of what might be wrong—is to use an automotive scan tool.

Using an OBD2 scanner is a relatively simple process that can provide crucial information about the vehicle’s electronic and mechanical components alike.