Still waiting for the Canadian release of the service action. Will let you know once its installed if I notice a big difference. They are hoping early in the new year they are certified to release it. '19 GTI Autobahn 6MT - Dark Iron Blue Sent from my SM-G973W using TapatalkAgain, it's not...
Quote from "Rennwerks"
Clearly there is a lot of speculation as to what is causing the 2019 manual transmission (but not the DSG) GTIs and GLIs to have a low-rpm stalling issue. As reflected above, VoA has now issued a TSB -- that directs re-coding the engine control unit ["ECU"]) -- to address the problem. I don't doubt for a moment that VoA and VW AG have put a lot of effort into correcting the problem (likely motivated, in part, by the looming prospect of class-action lawsuits and the like).
Reflashing the ECU may do the trick. (Essentially, the re-coding "tells" the fuel pump and ignition systems that the engine is not being turned off and to continue running at the reduced engine rpm.) This fix, IMHO, is a work-around. A reasonably sophisticated one, but a work-around nonetheless. It (again, IMHO) is motived by VW AG's desire to enable the EA888 engine to perform satisfactorily on 0W-20 weight motor oil, despite the fact that the engine was designed and engineered to use a heavier-weight motor oil (0W-40 or 5W-40). And, in this regard -- for those who are only now being introduced to this issue -- the device that is most immediately affected by engine oil pressure is the variable valve timing solenoid. Depending on the oil pressure through the value, an electrical signal is sent to the ECU. Just as oil pressure would cease when the engine is turn off using the ignition key, the same electrical signal is sent to the ECU when the engine rpm falls to and below a normal idle speed. In other words, when the oil pressure falls precipitously, the ECU turns the engine off, just as if it had been done with the ignition key. So, what's a better "fix"? Obviously, maintain "normal" idle oil pressure. It's just that simple. How can that be done? That too is simple enough: Use the oil weight previously specified for the EA888 engine before VW AG went on its most recent quest for increased fuel economy. I.e., 0W-40 weight oil (Castrol 0W-40 would my choice), or Mobil 1 0W-40, macht nichts).
Footnote, of sorts: You should know that neither VoA nor VW AG can official advise 2019 GTI/GLI owners to return to the oil weight previously specified. Why, you ask? Because the vehicles were certified to the NHTSA and the EPA as emissions compliant with 0W-20 weight oil. To change the oil specification to 0W-40, VW AG would be required to re-perform the certifications testing. That testing would cost millions. Literally. So, the work-around "fix" is the one now being authorized: re-coding the ECU. This may work. Then again, it may not. But, once again IMHO, there is no free lunch. The re-coding may solve one problem and create others. We will know as more owners have their cars "fixed".