I posted a picture I got from a friend of mine about the TB1 code regarding the possible detection of piggybacks.
This was news to me as I'm no longer active on this site. But I was promptly updated by a member on the GTI side that it's been known since 2016
I just deleted the picture since I didn't know how to delete a thread
To date no one in a dealership has even seen that document.
At the time we scanned all the bulletins to see if it can be found but it seems this was made up by someone that didn't have the greatest intentions.
Also what is interesting to note is the document says that flashed cars will reflect a X at the end of the hardware version of the ECU which also never happened ever.