Where the cases come from
Workshops use WrenchLane to diagnose the cars in their bays. A mechanic enters the fault codes and what the car is doing, and WrenchLane ranks the likely causes and the checks to do first. Every case article starts from one of those real diagnoses.
Before anything is written, the record is anonymised. The workshop, the customer and the number plate are never used. What we keep is the car (make, model, year and, when recorded, the engine), the fault codes, the symptoms and the causes WrenchLane ranked. That is the information you see in the case facts box at the top of each article.
What the AI does, and what it does not
The article text is written with AI from that anonymised record. The AI explains the codes, the ranked causes and the checks worth doing, in a form that is easier to read than a diagnosis screen.
The AI does not decide the facts of the case:
- The car and the fault codes come from the diagnosis record, never from the AI.
- A guard refuses any article that names a car the record does not have. If the text drifts to another make or model, it is not published.
- Automated structure and quality checks run on every article before it is published.
The author shown on every case is WrenchLane, the company. We do not invent mechanic names or photos, and we do not list the AI as an author. If a named person reviews an article, the article will say so, with their name and role.
What the video shows
Some cases have a video. It is a fresh run of the same car and the same fault codes in the WrenchLane app, recorded on our own test system, so you can see the diagnosis being made. It is not footage from the workshop that ran the original job.
Sometimes the exact engine variant is not available on the test system. Then we record a comparable engine variant of the same car, and the video says so.
The limits of a case
A case is one car with one set of codes and symptoms. It shows how that diagnosis was ranked, not a guaranteed fix for every car with the same code. The same code can have a different cause on a different engine, mileage or history.
Always test before you replace parts. Use the checks in the article to confirm or rule out each cause on the car in front of you, and follow the manufacturer's repair information.
Corrections
If you find a mistake in a case, tell us and we will fix it. Write to hello@wrenchlane.com or use our contact page, and include the link to the article.