Three steps to
better context.
No shop visit required to understand what your car is saying. Here’s the whole flow, start to finish.
Plug in a compatible OBD-II scanner
Any common ELM327 or OBDLink adapter works. The port sits under the dash on every gas or diesel vehicle sold since 1996.
Connect Revzy AI
Pair the adapter and pick your vehicle. Revzy AI links to the car’s computer and starts reading in seconds.
Get AI-powered insights
Fault codes are cross-referenced with live sensor data to surface likely causes, severity, and what to check next, in plain English.
What a scan
gives you.
Ranked, with the reasoning shown: probable causes, not promises.
An honest read on what can likely wait and what shouldn’t.
Simple confirmations to run before any parts get replaced.
A per-system score for the vehicle, tracked over time.
The actual readings behind every conclusion, on the record.
One scan. A verdict
you can act on.
Not a wall of codes, but a structured diagnosis. This is the report screen from the app, blown up so you can read every line: what it is, how urgent, what it costs, and the evidence behind each claim.
Diagnosis
Clogged fuel injector in cylinder 3. The misfire is isolated to one cylinder while bank-1 fuel trims pull +18.2%: the computer is adding fuel to cover what injector 3 isn’t delivering. Ignition and sensors check out clean.
Urgency
Safe to drive about a week. Skip long highway runs: sustained misfires send raw fuel into the catalytic converter, and that’s a $1,200 part.
What it should cost
| Parameter | Reading | Normal | Status |
|---|---|---|---|
| Fuel trim · short, bank 1 | +18.2% | ±10% | FLAG |
| Misfire counter · cyl 3 | 12 / min | 0 | FLAG |
| Misfire counters · cyl 1, 2, 4 | 0 / min | 0 | OK |
| O₂ sensor · B1S1 swing | 0.1–0.9 V | 0.1–0.9 V | OK |
| Coolant temperature | 91°C | 88–104°C | OK |
Swap ignition coil 3 with coil 2 and rescan. If the misfire stays on cylinder 3, it’s fuel, not spark. Two bolts, one connector.
Depressurize the rail, lift it, swap the injector with a new seal kit, and torque the rail bolts to 18 N·m. Revzy AI walks each step with photos for your exact engine.
Clear the codes, idle for ten minutes, rescan. Fuel trims back inside ±5% and a zeroed misfire counter mean you’re done, and your report logs the fix.
SHOWN ENLARGED FOR THE WEB. EVERY REPORT LIVES ON YOUR PHONE, SHAREABLE AS A PDF WITH ANY MECHANIC.