By using C15-OBD you agree to these terms. If you do not agree with them, please do not use the app. Our Privacy Policy explains what happens to your information and forms part of these terms.

C15-OBD reads standard OBD-II data through an ELM327-compatible Bluetooth reader plugged into your vehicle's diagnostic port. You need a compatible reader of your own. Coverage depends on the vehicle: standard engine data is available on most cars from around 2001 onwards, but individual modules, manufacturer-specific codes and adaptations vary by make, model and year, and some vehicles will not respond at all.

Do not use the app while driving. Park safely and turn the ignition on to connect; only run the engine where a procedure calls for it. Clearing codes, running tests or applying adaptations can change how your vehicle behaves, so follow the manufacturer's procedure and satisfy yourself that the change is right before you make it. You are responsible for the work you carry out on your vehicle.

Readings, fault-code descriptions, repair tips and AI-generated guidance are general information, not a professional inspection. They can be incomplete, out of date or wrong, and a code does not always point to the fault it names. Never rely on them for safety-critical systems such as brakes, steering, airbags or fuel — have those checked by a qualified technician.

Premium access is billed through Base44 Payments. Where a free trial is offered, it runs for the stated period and then continues as a paid subscription unless you cancel first. Subscriptions renew automatically each period until cancelled; you can cancel at any time from Settings, and access continues until the end of the period you have paid for. The price you pay is the one shown at checkout, and we will give you notice before any price change.

Keep your sign-in details safe and tell us if you think someone else is using your account. You are responsible for what happens under your account. You can delete your account from Settings whenever you like.

Use the app for your own vehicles and those you are authorised to work on. Do not attempt to break, overload or reverse-engineer the service, copy it, resell it, or use it in a way that breaks the law or the rights of others. We may suspend accounts that do.

The Shop page links to third-party retailers. Some of those links are affiliate links, which means we may earn a commission if you buy through them — it does not change the price you pay. Those shops are run by other companies and we are not responsible for their products, advice or websites.

The app, its fault-code reference and its content belong to us or our licensors, and you get a personal, non-transferable licence to use the app. The information you enter — your vehicles, scans and notes — stays yours.

Features may change, be added or be withdrawn, and the service may be unavailable during maintenance or when something outside our control fails. We do not promise uninterrupted availability.

The app is provided "as is". To the extent the law allows, we are not liable for indirect or consequential losses, for repair or parts costs, or for decisions you take based on the app. Nothing in these terms limits liability that cannot be limited by law, including for death or personal injury caused by negligence, or fraud. Where our liability stands, it is limited to the amount you paid us in the twelve months before the claim.

You can stop using the app at any time and delete your account from Settings. We may suspend or end access if these terms are broken or if we have to close the service, and where possible we will give you notice.

These terms are governed by the law of England and Wales, and the courts of England and Wales can hear any dispute — although if you live elsewhere in the UK or in the EU you keep the consumer protections of your own country.