Audi A1 ECU Failure Causing Severe Power Loss

My Audi A3 2.0 TDI from 2015 had similar vehicle electronics issues. The symptoms matched exactly, sudden power loss and multiple error codes. After car diagnostics, the main relay turned out to be the culprit, causing ECU problems. The main relay serves as a critical connection between the engine control unit and various engine components. When it fails, it disrupts normal ECU functions and engine performance. The repair involved replacing the main relay unit and performing a complete computer module reset. A failing main relay is considered a serious issue since it can leave you stranded without warning. The repair process requires specialized diagnostic equipment to properly reset the ECU and verify all systems are communicating correctly. The fix proved reliable, no recurring issues for over 40000 km now. Consider having the battery tested as well, as weak batteries can sometimes cause similar symptoms with vehicle electronics. Would recommend finding a garage that specializes in Audi car diagnostics, as proper diagnostic equipment is essential for accurate troubleshooting.

Thanks for sharing your experience. Sounds familiar to what I dealt with last week. Since my engine control problems started happening intermittently, I waited too long before getting it checked. That was a mistake, it ended up causing more issues with the vehicle electronics. Your solution with the main relay makes sense. Would you mind sharing what the total cost was for your repair? And have you noticed any other quirks with the system since the fix? Asking because my garage suggested I might need additional computer module updates after the initial repair. Just want to ensure I budget correctly for both the immediate fix and any potential follow-up system reset procedures they might recommend.

Had the ECU repair done at a certified shop and the engine performance has been flawless since. The main relay replacement fixed all engine control issues completely, no additional computer updates were needed. Total cost was 120 Euro for parts and labor, which included the system reset and full diagnostics. Going on 6 months now with zero vehicle electronics problems. The engine control unit works perfectly, and all error codes cleared permanently after the fix. If your symptoms match what I experienced, the main relay is likely the root cause. Just make sure your shop uses proper diagnostic equipment for the ECU reset after replacement. Would definitely recommend getting it fixed sooner rather than later to prevent any cascade of engine performance issues. The 120 Euro I paid was worth every cent considering the reliable fix and peace of mind it provided.

After reading all this helpful feedback, I finally got my car fixed last week. Found a specialized shop that really knew their way around vehicle electronics and engine control systems. The diagnosis matched what was discussed, it was indeed the main relay causing the computer module issues. Total repair came to 150 Euro, slightly more than expected but included a full system diagnostic and ECU reset. The mechanic showed me the worn relay components, which helped explain the intermittent power loss. The engine performance is now back to normal after the fix. All error codes cleared and the control system is working perfectly. Really glad I got it sorted before any bigger issues developed. The shop also did a complimentary battery check, which turned out fine. Should have addressed these warning signs earlier, but at least now I know what to watch for with the engine control unit. Thanks again for the guidance, helped me feel more confident about the repair process and typical costs involved.