A customer in Daventry, Northamptonshire had an Audi A5 2012 with an immobiliser issue — the car wouldn't start as expected and needed a full diagnostic read to identify the fault. We attended on-site with professional equipment and diagnosed the problem without any dealer visit.
The Job
We connected our Autel diagnostic system to the car's OBD port and ran a full read of the immobiliser module, ECU, and key transponder data. This gives us a clear picture of what's actually happening in the system — which module is reporting a fault, whether it's the key, the antenna ring, or the control unit — rather than guessing.
On VAG-platform Audis like the A5, the immobiliser is tightly integrated with the engine control unit and body control module. Professional diagnostic equipment is essential to read fault codes accurately and to distinguish between a failed transponder, a wiring fault, and a module-level problem.
Why On-Site Diagnostics?
Most car dealerships charge a diagnostic fee before they even begin looking at the car — and that's before any repair work. A mobile auto locksmith can run the same diagnostic reads on your driveway, often at a lower cost, without needing to tow the car or take a day off work.
For immobiliser faults specifically, a mobile specialist is often the faster and cheaper first call. If the fault is key-related (which it frequently is), we can usually resolve it in the same visit.
Audi Models We Cover
A1, A3, A4, A5, A6, A7, A8, Q3, Q5, Q7, TT, R8 and all other Audi variants — including older IMMO2/3/4 and current IMMO5/MQB systems. See our Audi key & diagnostics page.
Covering Daventry and Northamptonshire
We serve Daventry, Northampton, Rugby, Coventry, Leamington Spa and surrounding areas — 24/7. Call 07783 940506.