ScanX Bluetooth OBD2 Scanner for Engine, Trans, ABS and SRS

The ScanX is a plug-in Bluetooth OBD2 adapter that pairs with the CarScanner app on iPhone or Android and turns the phone into a full-system scan tool. It reaches past the engine computer into the transmission (TCM), ABS, SRS/airbag, electrical and emissions modules on supported vehicles, and reads and clears enhanced manufacturer codes, not just generic P0 codes. The app license is lifetime, so there is no monthly subscription to keep it working.

For transmission diagnosis, plug it into the 16-pin port under the dash, connect over Bluetooth 5.2, and pull TCM codes before the pan comes off. Shift solenoid, pressure control and gear ratio faults show up as real DTCs with freeze-frame data, and the live data screen lets you graph sensor readings while you drive so you can see when a slip or flare actually happens instead of guessing from a check-engine light.

It also runs supported service resets and maintenance functions, and on many 2012-and-newer vehicles it can code comfort and lighting options. Module access, service functions and coding vary by make, model and year. It covers most OBD2-compliant cars and light trucks sold in the U.S. from 2000 on, and is a handy pre-purchase check on a used vehicle to find stored codes a short test drive will not reveal.