The car diagnostic app that doesn't need a plug.
Check-engine light on? Strange noise? Describe it in plain English or type in the OBD2 code — MECH AI ranks the likely causes for your exact vehicle, tells you how serious it is, and walks you through the fix.
MECH AI works in English, Spanish, Portuguese, Russian, German, French, and Italian — the AI answers in your language.
Free to start · daily AI Mechanic allowance · no card · no hardware
Everything between "what's that light" and "fixed."
OBD2 code decoder
Enter any P, B, C, or U code and get the plain-English meaning, severity, and the ranked likely causes for your exact year, make, and model.
Symptom diagnosis
No code? Describe what the car is doing — "shakes at 70", "grinding when braking" — and the AI Mechanic narrows it down question by question.
Guided diagnostics
Structured diagnostic sessions you can pause and resume. Start in the driveway, finish after work — it remembers where you left off.
Vehicle Health score
A rolling health score per vehicle that surfaces what your car will need next — before the dashboard lights up.
TSBs & recalls
Manufacturer service bulletins — the known-issue fixes dealers don't volunteer — searchable in plain English for your vehicle.
Repair guides & parts
Step-by-step repair walk-throughs with tools and time estimates, plus integrated Amazon + eBay parts search scoped to your exact trim.
Want the deep dive on a specific code first? Browse the free OBD2 diagnostic code library or the symptom guides — no account needed.
What about OBD2 scanners?
Hardware reads codes. Diagnosis is the hard part.
A $20 Bluetooth dongle can tell you the code. It can't tell you whether that P0420 on your specific engine is a $45 sensor or a $1,200 converter — that's the part MECH AI does. Use it alongside any scanner you already own, and Bluetooth OBD2 reader support (live sensor data, read-only) is coming soon so you won't need a second app even for that.
Comparing options? See the honest head-to-heads: MECH AI vs FIXD, vs OBD AI, vs Carly — or the full comparison hub.
Car diagnostic app questions.
- Not with MECH AI. It works from your words — describe the symptom, type in a code you saw on a loaner scanner, or show it a photo of the dashboard. If you already own a reader, the built-in decoder interprets what it found. Bluetooth OBD2 reader support (BLE ELM327, read-only live sensor data) is coming soon.
Stop guessing. Start diagnosing.
Describe the problem like you'd tell a friend who happens to be a master tech. Free to start, no card, no scanner required.
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