Why it helps
Fast lookup from a symptom or code to a relevant guide without creating an account; a low-friction entry point into WrenchLane.
The Symptom & DTC checker is a free guide finder. Type what the car is doing or a trouble code (for example P17F0) and it shows up to 3 matching WrenchLane guides. If nothing matches, it points you to the WrenchLane app for a full AI diagnosis.
No account needed.
How to
- Go to guides.wrenchlane.com/checker
- Type a symptom or trouble code
- Click Check, or click one of the Try: examples
- Open a matching guide, or click Run a full AI diagnosis in the WrenchLane app
Good to know
- Labelled Beta.
- It searches WrenchLane's published guide library only. It is not a live AI diagnosis of your vehicle.
- Shows at most 3 matches.
- Symptom matching works best in English; trouble codes work in any language.
- The checker also appears at the bottom of each guide page.
Related questions
Is there a free fault code tool I can use without an account?
Yes. guides.wrenchlane.com has free diagnostic guides for common codes and symptoms, and a Beta checker that matches a symptom or code to up to 3 published guides. wrenchlane.com also has a page per fault code built from diagnostics run in WrenchLane.
Learn more: WrenchLane Guides (diagnostic guides), Free symptom & DTC checker, Fault code pages on wrenchlane.com (fault-code cluster)
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