RS7 Fuel Sensor Issues Cause Stalling & Electronics Chaos

Had the same trouble with my 2015 Audi S7. The symptoms match exactly what turned out to be a faulty sensor in the fuel system. The level sensor was sending incorrect readings to the ECU, causing those unusual stalls and electrical gremlins. The sensor fault triggered multiple error codes related to the fuel system. Mechanics initially misdiagnosed it as a fuel pump issue, but diagnostic testing revealed the real culprit. A complete fuel level sensor replacement was needed, along with recalibration of the fuel system sensors. This is actually a known issue in some VAG models from that period. While not a critical safety concern, it definitely needs addressing to prevent potential fuel delivery problems and further electrical issues. The repair itself is fairly straightforward once correctly diagnosed, requiring access to the fuel tank. The original sensor typically lasts about 100000km, so your mileage suggests its likely time for replacement. Would recommend having a specialized VAG workshop handle this, as proper diagnostic equipment is needed to ensure all fuel system components are communicating correctly after the fix. Best to address this soon, as continued sensor malfunction can lead to more serious fuel delivery issues over time.

Thanks for sharing your experience. The same issue hit my RS7 last summer. After the fuel sensor replacement, everything went back to normal and no error codes on the car dashboard since then. The stalling completely stopped too. Did you track how much the repair ended up costing? Also wondering if any other fuel system problems popped up after fixing the faulty sensor? Just want to make sure I keep an eye out for potential related issues.

Since my repair last year, the fuel level sensor replacement completely resolved all those annoying issues. The car runs perfectly now with no fuel system errors or stalling. The total cost came to 52 Euro for a blown fuse that was causing the sensor malfunction, much cheaper than I initially feared. No additional fuel tank or fuel system problems have emerged since the fix. The faulty sensor was definitely the root cause, and once replaced, all the dashboard warnings cleared up. Just make sure to keep an eye on your fuel gauge readings, any unusual fluctuations could indicate early signs of sensor issues. From my experience, these fuel sensor problems rarely come back if properly diagnosed and fixed. The key was having a qualified technician who knew exactly what to look for in the fuel system diagnostics. Regular maintenance should prevent any repeat sensor failures.

Thanks for the input. After dealing with this headache, I finally got it sorted at a different shop. The mechanic diagnosed the faulty fuel level sensor right away, wish I had gone there first! The repair took about 3 hours and cost 780 Euro total, including parts and labor. They had to drop the fuel tank to replace the sensor unit, but the shop knew exactly what they were doing. The car dashboard is now error-free and the engine runs smooth as silk with no more stalling. One tip from my experience: the diagnostic computer showed multiple error codes, but the experienced mechanic recognized it was all stemming from the bad fuel system sensor. No point throwing parts at the problem like my first mechanic tried to do. Really glad this is fixed now. The car feels like new again and I have peace of mind knowing the fuel system is working properly. Just goes to show the importance of finding a knowledgeable mechanic who can properly diagnose these sensor issues.