Review on 🚗 Mestart OBDII OBD2 Bluetooth Car Diagnostic Scan Tool - Auto OBD Scanner for Android Devices by Jared Winebrenner

I hooked this up to a Cummins RAM 2500. The truck acted stupid when plugged in. It worked sometimes, but also stopped a couple of times and wouldn't start until this device was removed. In other cases it worked correctly, without any problems while driving. However, if I left it plugged in, the truck's interior lights stayed on the whole time, even when Torque Pro wasn't running. I ordered a larger OBD2 Bluetooth module which was recommended and seems to work without the above issues. I'm pretty sure this module caused the problems I'm having. I mentioned that the new one I bought is bigger. I had to buy an extension cord for this as it got in the way of my knees. The size was why I initially chose this one, but it's worth a few extra bucks to get a ribbon cable extension and a larger module.