AI VEHICLE DIAGNOSTICS
Your mechanic charges $150
to tell you this.
FREE TO START · NO CREDIT CARD · CANCEL IN 2 CLICKS
INPUT
Four ways to describe the problem.
Photo
"What's this puddle under my car?"
Audio
"It clicks when I turn right"
OBD-II
P0420 — Catalyst efficiency below threshold
Text
"Shakes over 60mph, worse after rain"
OUTPUT
Not a guess. A diagnosis.
Severity rating, cost estimate, and what to tell your mechanic — in seconds.
“Engine light on, rough idle”
Random/Multiple Cylinder Misfire
“Squealing when turning”
Worn Serpentine Belt
“Car pulls to one side”
Wheel Alignment / Tie Rod Wear
USE CASES
Built for the moments you Google your car.
The four scenarios most owners hit at least once a year. Fixo handles all of them in one place.
Check engine light just came on
Plug your OBD-II code (or just describe the symptoms) and find out whether it's a $50 sensor or a $1,200 catalytic converter — before you panic.
Mechanic quoted me $800 — is that fair?
Run the same diagnosis Fixo runs for any shop. Get a parts and labor range you can compare against the quote. Walk back in informed.
Thinking of buying a used car
Snap photos of the engine bay, undercarriage, and dashboard. Fixo flags anything sketchy — fluid leaks, mismatched panels, warning codes — before you sign.
Weird noise that won't go away
Record the click, knock, or whine. Fixo's audio analysis maps it to the most common causes by RPM, speed, or steering input.
WHY TRUST IT
Diagnoses you can actually take to a mechanic.
Powered by Gemini 3
Frontier multimodal AI cross-referenced against a curated DTC + symptom database, not a generic chatbot.
Privacy-first
Photos and audio you upload generate your private diagnosis only. No data sale, no public model training.
Universal coverage
Works on any 1996+ US-market vehicle via OBD-II. Symptom-based diagnosis for everything older or newer.
PRICING
One shop visit or a year of Plus.
You pick.
FAQ
Things people ask before signing up.
Fixo cross-references your inputs against a database of OBD-II codes, common failure patterns, and shop-rate labor times. It's accurate enough to walk into a shop knowing what to ask for, and it'll tell you when a problem genuinely needs a hands-on inspection. Treat it as a strong second opinion, not a substitute for a wrench.
No. Most diagnoses start from a photo, a description, or a sound. If you do have an OBD-II reader, you can paste in DTC codes (P0420, P0171, etc.) for sharper results — but it's optional.
Engine codes, fluid leaks, strange noises (clicks, knocks, whines), vibration, dashboard warning lights, brake or suspension issues, electrical glitches, and more. If you can describe it, photograph it, or record it, Fixo can usually narrow it down.
Yes. Photos and audio you upload are used only to generate your diagnosis and stored in your private history. We don't sell your data and we don't train public models on it.
It works on most gas, hybrid, and electric vehicles from major manufacturers. OBD-II coverage is universal for any 1996+ US-market car. Newer EVs and rare imports may have less specific guidance, but symptom-based diagnosis still applies.
Free tier covers ~1 full diagnosis a month with no credit card. Plus is $19.90/month for ~13 diagnoses — less than the inspection fee at most shops, every month. Top-up packs available at $1 = 100 credits for heavy weeks.