DEF systems are shit. I'm a trucker up here in Canada and everyone disables the DEF. There's a couple sensors that can shut down the vehicle when they stop working and the parked regen is the most retarded process anyone could think of in automotive history. You literally sit in one spot at high idle for an hour to clear out the exhaust. Burning unnecessary fuel to reduce emissions?

One more reason why I believe all this bs happening is the biggest redpill psyop to show how easy it's been to fool everyone.