Audi S4 Reset Quantity Drift Fix Needed, Help

Had similar injection issues on a 2016 Audi A6 3.0 TDI. The drift compensation error often points to faulty injectors, which was exactly my case. The performance tuning process revealed one injector was not atomizing fuel properly. The fix required more than just a system reset. After diagnostic tests and airflow sensors verification, the repair involved replacing two fuel injectors and performing a complete injection calibration. The drift compensation values needed proper reset procedure afterward to ensure the engine management system learned the new parameters correctly. This is typically a serious repair requiring specialized diagnostic equipment. The symptoms match perfectly, rough running and check engine light are classic signs of injector problems when combined with drift compensation errors. These issues can worsen quickly and potentially damage other engine components if left unaddressed. The repair involved: Full diagnostic scan, Injector removal and testing, New injector installation, System programming, Reset procedure for injection quantities, Final performance testing The entire process took about 6 hours of shop time. This repair requires specific expertise with modern diesel injection systems and proper diagnostic tools to complete successfully.

Thanks for sharing the details about the injector repair. Your solution matches what the onboard diagnostics suggested for my S4 too. Been looking at the repair steps and it seems pretty comprehensive. Would you mind sharing what the total cost was for your fix? Also curious if any other issues popped up after the drift compensation reset was done? Want to make sure I budget correctly and know what to watch out for.

Went to a certified diesel specialist last month and got everything sorted. After checking the onboard diagnostics, they confirmed it was indeed an injection valve problem causing the drift compensation issues. The total repair came to 515 Euro, which covered replacing the faulty injector and performing the complete system reset. Since getting the reset quantity drift compensation fixed, the engine has been running smoothly with no check engine lights. The fuel economy has actually improved noticeably, probably because the fuel injection system is now working correctly. The shop did a thorough job testing all airflow sensors and running multiple diagnostic checks to ensure everything was properly calibrated. One tip: make sure they perform a complete compensation adjustment after replacing any injection components. It ensures the system learns the correct fuel delivery parameters. Been about 4 weeks now and no additional issues have surfaced. The repair might seem costly, but its worth getting it done right to prevent more expensive problems down the line.

Thanks to everyone who shared their experiences. Finally got my S4 fixed last week. Found a good diesel specialist who really knew what they were doing with these injection systems. The final diagnosis matched what others mentioned, faulty injector causing the drift compensation problems. Total bill came to 490 Euro for parts and labor. They replaced one bad injector and did a full system reset procedure. The performance tuning afterward made a huge difference. Car runs like new now, no more rough idle or check engine lights. Fuel economy is actually better than before. The shop did a thorough job checking all car sensors and making sure the drift compensation values were properly calibrated. Definitely worth paying for someone who knows these systems well. Much better experience than my previous mechanic who just wanted to throw parts at the problem. Really glad I asked for advice here before proceeding with repairs.