I’ve picked seven of the best Bluetooth-connected scanners that plug into a car’s OBD2 socket and put them against each other in a mega test of diagnostics. Here are the best Bluetooth OBD2 scanners.

I sat at my desk, staring at a mountain of receipts and contracts waiting for my signature. My first thought was to grab my phone and open the scanner folder. For as long as I could recall, I ...