Here's my (probably very expensive) lesson for today: Don't fill your DEF tank with truck stop diesel exhaust fluid at the pumps. Oh well, bye bye savings account. (2011 Touareg) : r/tdi
AdBlue System Fault Repairs for VW, Audi, Seat and Skoda TDI engines.
Vw abblue count down reset with autel - YouTube
Digital Kaos
Resetting the adblue "no start condition" with VCDS - YouTube