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jonashimmel4

RS7 Multiple Error Warnings Need Diagnosis Now

My RS7 from 2021 (89500km) started showing multiple error messages across all displays today. The engine light came on and my mechanic recently messed up a simple repair job, so I am hesitant to return there. Has anyone dealt with similar fault codes on their RS7? Most concerning is that warnings appear in both the infotainment and instrument cluster simultaneously. The engine runs fine, but I want to address this before it becomes a bigger issue. Would using a scan tool to check the error codes myself be worth it before visiting a different shop?

4 comment(s)

sebastianmoore1

Having experienced similar issues with my 2018 RS5, I understand the concern about multiple warning messages. The simultaneous warnings across displays often point to a control module communication issue rather than actual mechanical problems. When this happened, a diagnostic scanner revealed multiple fault codes related to module coding. The root cause was incorrect coding after a previous repair, where the control modules lost their proper configuration settings. While the engine ran normally, leaving it unchecked could have affected other vehicle systems over time. Using a scan tool yourself is a good first step. However, resolving coding issues typically requires dealer-level equipment to properly reprogram the affected modules. This is not a typical repair shop job, as it needs specific software access and expertise with Audi diagnostic systems. The fix required connecting to the vehicle diagnostic interface and recoding several control modules to restore proper communication. While not mechanically serious, it was critical to address to maintain proper system integration and prevent potential cascading issues with other electronic components. For reference, Audi RS models are particularly sensitive to coding issues due to their complex network of control modules. Having the fault codes ready before visiting a specialized shop will help streamline the diagnosis process.

jonashimmel4 (Author)

The diagnostic scanner findings you described match what I experienced with my RS7. Getting those engine diagnostics done early saved me from bigger headaches. Running the OBD-II scan showed similar control module communication errors, though mine started happening at around 65000km. Can you share what the repair costs were in your case? Also wondering if you had any recurring issues after the fix, since these reset codes can sometimes indicate deeper electronic problems.

sebastianmoore1

After getting the fault codes diagnosed and fixed at a certified shop, I can confirm my RS5 has been running perfectly with no recurring issues. The malfunction indicator light disappeared completely after they corrected the control module coding problems. The total repair cost was 360 Euro, which covered the diagnostic scanner service and reprogramming work. While not cheap, addressing the communication errors early prevented potential complications with other electronic systems. Its been over 18 months since the fix, and the reset codes have not returned. The key was having a technician with proper diagnostic equipment who could properly recode the affected modules. Getting it done right the first time is crucial with these sophisticated vehicle systems to avoid repeated issues. Based on the matching symptoms in your RS7, it sounds like you caught the issue early enough to prevent any lasting damage to the electronic components.

jonashimmel4 (Author)

I took my RS7 to a specialized Audi shop yesterday after reading your responses. The diagnostic scanner confirmed exactly what you mentioned, multiple fault codes related to control module communication. The check engine light and error messages were indeed caused by incorrect coding from my previous repair. The new shop had the right diagnostic equipment and expertise. They recoded the affected modules and cleared all fault codes. Total cost came to 420 Euro, slightly more than what you paid but still reasonable considering the complexity. The engine light is now off and all displays are working normally again. Really glad I avoided going back to the original mechanic who likely would have made things worse. Having the initial scan data helped the new technicians pinpoint the issue quickly. The whole repair took about 2 hours and they showed me the before/after diagnostic readings to confirm everything was properly reset. Makes sense now why these issues started after that botched repair job. At least its sorted properly this time with no damage done to any systems.

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