Diagnose fault codes, symptoms and complex vehicle problems with WrenchLane.
No credit card, no trial clock. Every day you get a full AI diagnostic, chat, AI searches and Ask WrenchLane questions — with TSB search and diagnostic reports included.
$0. No credit card required.
WrenchLane Free is a working diagnostic tool — these are yours every day, on any car.
1 full AI diagnostic a day: fault codes and symptoms in, ranked causes with likelihood and severity out.
3 Ask WrenchLane questions and 10 AI searches a day — sourced, cited answers instead of forum digging.
Find technical service bulletins for the exact vehicle and symptom you're looking at.
Diagnostic reports and your last 5 ongoing diagnostics stay saved in your garage.
Already pulled DTCs with your OBD reader? Skip the typing. Take a photo of the reader's screen and WrenchLane reads the codes — add the symptoms by typing or speaking, and the diagnosis starts. Or enter codes manually if you prefer.
The free plan follows the same diagnostic flow the workshop plans use.
Fault codes, symptoms or both — typed, spoken or from a photo of your OBD reader.
WrenchLane weighs likelihood and severity so you check the right thing first.
Guided suggestions for what to verify and what the fix usually involves.
No trial countdown — the free plan stays free. Upgrade only when you need OEM depth on the cars you're fixing.
“We primarily use WrenchLane to troubleshoot complex diagnostics where there are multiple fault codes.”
Kamil — Bilverkstad i Nacka AB, Stockholm
Working deep on one car? WrenchLane ONE unlocks full OEM data for a single vehicle, from $5/month billed yearly. Running a workshop? Small gives 1–2 mechanics premium data for 20 vehicles a month with unlimited diagnostics and Ask WrenchLane. Everything you saved on Free comes with you.
Free. There's no countdown and no card on file — the daily allowance resets every day.
One full AI diagnosis per day: codes and symptoms in, ranked causes with likelihood, severity and suggested checks out.
No — you can describe symptoms in plain language. If you have a reader, snap a photo of its screen and WrenchLane reads the codes.
One demo vehicle comes with full InfoPro technical data unlocked, so you can see exactly what the paid plans include.
Full OEM technical data, verified measurements and team members. Unlock them per vehicle with ONE, or for the workshop with Small.
Enter codes and symptoms for any car you're working on. Full OEM data depth comes from Infopro Digital Automotive when you unlock a vehicle on a paid plan.
Start free — no credit card, no clock. Your first diagnosis is minutes away.