Multiple Audi S3 Error Messages Signal System Malfunction

As someone with some repair experience, I had a very similar issue with my 2017 Audi S4 last year. Multiple warning messages appeared simultaneously, including the engine light, which was quite concerning. The first step I took was connecting an OBD-II scanner to read the fault codes. However, this only gave partial information, as the issue was more complex than a single system failure. After taking it to a specialist workshop, they discovered the root cause was incorrect coding in the control module. The symptoms matched yours exactly, multiple system warnings and error messages across different displays. The technicians had to reprogram and properly code the vehicle systems, which resolved all the warning messages. The total repair cost in my case was 360 Euro, covering diagnostic work and control module coding. It turned out to be a much simpler fix than initially feared, though it required specialized equipment and expertise. Before suggesting more specific solutions, could you share: Are there any specific error messages showing? Did these warnings appear suddenly or gradually? Have you recently had any work done on the car? Does the car drive normally despite the warnings? This information would help determine if your issue is similar to what I experienced or if it might be something different.

Thanks for sharing your experience. I have the same problem with my S3 at 174384KM. The warnings appeared suddenly after my last service two weeks ago. The malfunction indicator came on first, followed by multiple system errors. I connected a basic OBD-II diagnostic scanner but got several different codes which dont make much sense together. The car still drives fine, just all these warning lights and messages are concerning. The engine light stays on constantly. Before taking it to a specialist, I wanted to check if others had similar experiences with control module issues after routine maintenance. The timing seems suspicious since everything was fine before the service.

Interesting that your issues started right after the service. On my S4, I learned that certain routine maintenance procedures can sometimes trigger these multiple system warnings, especially if any control modules were reset or disconnected during service. Since you mentioned using a basic diagnostic scanner and getting multiple unrelated fault codes, this strongly suggests a control module communication issue, exactly like what I experienced. The malfunction indicator and scattered error messages are typical symptoms when module coding gets disrupted. Driving normally despite the warnings is actually a good sign. In my case, this also indicated that the core mechanical systems were fine, and the problem was mainly electronic/coding related. Given the similarity to my situation and the timing after your service, I would recommend: Get the fault codes cleared using a more advanced diagnostic scanner, Have the control modules checked for proper coding alignment, Request verification that all systems were properly reinitiated after the service The repair cost should be similar to what I paid (around 360 Euro), assuming its the same coding issue. The workshop might even cover it if they can confirm the service work triggered the problem. A quick check you can try: disconnect the battery for 30 minutes to force a complete system reset. While this didnt fix my issue permanently, it temporarily cleared some error messages and helped confirm it was a control module problem rather than actual component failures.

Thanks to everyone who replied. After reading about similar experiences, I decided to take action. First, I tried the battery disconnect method mentioned, but the warnings came back after a few hours. Since my basic OBD-II scanner showed multiple unrelated fault codes just like others reported, I contacted the service center that did my recent maintenance. They acknowledged similar cases where system warnings appeared after routine service work. The technician confirmed my suspicion about disrupted control module programming. They offered to check the coding and reset any fault codes that might have been triggered during the previous service. The malfunction indicator and other warnings turned out to be exactly what others described, a control module communication issue rather than actual mechanical problems. This explains why the car continued to drive normally despite all the warning messages. Im taking it back tomorrow to have them properly reinitialize all systems and verify the control module coding. They estimated costs similar to what others paid, but suggested they might adjust the fee since the issues appeared right after their service work. Will update once everything is sorted, but wanted to thank everyone for helping me understand the likely cause and typical repair approach for these post-service warning messages.