AI-powered OBD2 scanner
Check engine light on? AI tells you why.
Plug in the CarGenius adapter and the app reads your engine's fault codes and sensors. Then AI weighs that data against what you've noticed and tells you the most likely cause, what to check first and whether you can keep driving.
Coming soon to iPhone and Android. Works with any car that has an OBD2 port.
9,533
generic fault codes in our database
17
live engine sensors
6
languages, matched to your phone
0
accounts to create before you start
AI diagnosis
Like talking to a mechanic who has already seen your car's data
Tell it what you notice and the AI checks it against what the scanner read. You get its conclusion in under a minute.
Grounded in what was measured
If a value wasn't read, it doesn't make it up.
Tells you how sure it is
High, medium or low confidence.
Cheapest checks first
From what you can check to what needs a shop.
Knows your make
A Kia doesn't fail like a Nissan.
Why CarGenius exists
A light on the dashboard tells you something is wrong, and that's all. Your car knows exactly what happened, stored as a code almost nobody can read. CarGenius translates it so you walk into the shop knowing what to ask.
Three steps, under a minute
Plug in the adapter
It goes in the OBD2 port, usually under the steering wheel. Turn the key to ON or start the engine and the cyan light comes on.
Open the app
CarGenius finds the adapter on its own and reads stored and pending codes, battery voltage and engine sensors.
Understand what's going on
Every code comes in plain words, with the most likely causes for your make and what's worth checking before you spend money.
CarGenius adapter
Plug it in once and forget about it
It's about the size of a matchbox and lives in the OBD2 port under the steering wheel. When you open the app it's already connected; no digging through your phone's Bluetooth settings to pair anything.
- Bluetooth LE, which is what iPhones need. Android works too.
- Leave it plugged in: it goes to sleep when you turn the car off, so it won't drain the battery.
- A cyan light lets you know it's reading.
Until it reaches your country, the app works with any ELM327 Bluetooth LE adapter you can buy locally.
Tell me when it ships here
What your car knows, on your phone
See where the problem is
The app recognizes your car from its VIN and shows it to you from the inside. An engine problem lights the engine up in red; a battery problem, the battery. Tap the part to see what's wrong.
Pre-purchase check
Plug it into the car you're about to buy
The oldest trick for selling a car with problems is clearing its codes the day before. The engine computer counts the kilometers since that clear, and CarGenius shows you the count.
Recent clear
How far it has gone since someone turned the check engine light off.
Permanent faults
The ones a scanner can't clear stay until they're repaired.
VIN and odometer
Compare them with the title and the dashboard.
PDF report
Send it to your mechanic or use it to negotiate the price.
Before your emissions test
Would your car pass?
Your car runs its own emissions self-tests, called readiness monitors. CarGenius shows which ones have finished and which haven't, and warns you if codes were cleared recently, the most common reason cars get turned away.
It's an estimate. Every testing program sets its own rules.
Know if you can keep driving
Every fault comes with one of three answers: keep going, get it checked soon, or stop. That's how you decide between driving home and calling a tow truck.
Your car's history
Every scan is saved with its date, codes and diagnosis. If the problem comes back, you can compare it with last time.
What did it turn out to be?
Once your car is fixed, you can tell us what was done and what you paid. Those answers make the next diagnoses for your model more accurate.
No account, no email
Open the app, plug in the adapter and scan. You don't have to sign up to see what's wrong with your car.
See CarGenius in action
Screenshots taken with an OBD2 simulator.
Frequently asked questions
Will it work with my car?+
If your car has an OBD2 port, yes. Almost every gasoline car sold in the last 20 years has one. You'll find it under the steering wheel, near the driver's knees.
Do I need the CarGenius adapter?+
You don't have to. The app also works with other brands of ELM327 Bluetooth LE adapters. Ours is the one we test the app with and it connects by itself, so you don't have to guess which one to buy.
Does it work in my country?+
Can I turn off the check engine light with the app?+
Yes, you can clear the codes. We suggest doing it only after the repair: if the cause is still there the light comes back on, and clearing codes right before an emissions test will get your car rejected.
Does it replace my mechanic?+
No. It helps you understand what your car detected and what to ask, so you show up at the shop informed and can compare quotes.
Where does the diagnosis come from?+
From the data the scanner read from your car, a database of 9,533 fault codes and whatever you tell us. The AI only interprets what was actually measured and tells you how sure it is of each conclusion.
When does it launch and how much is it?+
We're testing on real cars. Leave your email below and we'll let you know the day the app launches, with the adapter's price in your country.
Be one of the first to use it
We'll send you a single email when CarGenius is on the App Store and Google Play.