OBD2 scanner guides
What an OBD2 scanner can tell you before you spend money, and how the scanners compare. For a code you already have, see the trouble code library; for a warning light, the symptom guides.


Read your car's codes, live sensors and readiness monitors on your iPhone. Obie explains them in plain words.
$34.99 preorder, regular price $49. Free shipping in the US.
Codes and live sensors are free in the app. Obie, the AI mechanic, is part of ScanMyCar Pro.
Read it on your own car
ScanMyCar reads your car's codes, with stored, pending and permanent codes from every module, the freeze frame and 139 live sensors, and explains them in plain words. Trouble codes and live sensors are free. Obie, the AI mechanic, is part of ScanMyCar Pro.
The ScanMyCar OBD-II scanner: $34.99, regular price $49. Free shipping in the US. Terms
Works with the ScanMyCar OBD-II scanner or any Bluetooth OBD-II adapter. Sign in with your email.