Before you get started, please read this important notice.
AI Diagnostic doesn't need an OBD-II reader: enter your fault codes or describe your symptoms and get step-by-step repair guidance instantly. It's part of C15-OBD Premium, which starts with a 7-day free trial.
We accept no liability for any damage caused to your vehicle or any other property while using this app. The app is used entirely at your own risk.
The full van and heavy goods vehicle catalogue, with OBD-II and J1939 coverage per make.
Vans & Trucks is included in C15-OBD PRO (£10/month), which unlocks the workshop, customisations, van & HGV coverage and every other tool. Both plans start with a 7-day free trial.
See the plansThe live engine overview stays free without a subscription.