Obdia: OBD2 Car Scanner

Plug in an OBD-II adapter and find out what your car already knows about itself.

Read the faults and understand them Confirmed, pending and permanent codes, explained in plain English, with their likely causes in order and what to check first. Includes freeze frame: how the engine was at the exact moment the fault was logged.

Automatic analysis Obdia does more than read codes. It analyses the readings and draws its own conclusions: a thermostat stuck open, an air leak, an alternator that is not charging. Every conclusion comes with the data behind it, so you can check it rather than take it on faith.

The useful part: many of those patterns show up before the ECU turns the warning light on.

Live data RPM, speed, temperatures, fuel use, pressures and fuel trims, in a grid you arrange yourself. With alerts if the engine runs hot or the battery weakens.

Would it pass inspection? Tells you whether the emissions self-checks are complete, which is what actually decides whether your car passes.

Record and share Save a driving session and export it as a report or CSV. The report is made to be read, taken to a mechanic, or handed to an AI for a second opinion.

No accounts, no servers Everything stays on your phone. Obdia creates no accounts, sends your data nowhere and works offline.

Try it before buying an adapter Demo mode comes with a simulated car, engine running and a couple of faults. It behaves just like the real thing.

You need an ELM327 adapter. On iPhone only Bluetooth LE and WiFi adapters work; classic Bluetooth ones are not compatible due to an iOS limitation. Check before you buy.

Do not operate the app while driving.