There was a separate issue with the 3.0L TDIs (which do use AdBlue) that VW had not informed the regulators of certain modes that the engine could enter due to temperature. This looks like that issue.
"Audi also shed light on the Auxiliary Emission Control Devices (AECDs) which the EPA had earlier labeled "defeat devices," confirming that the tech was part of a "warmup strategy" for the catalyst in the 3-liter emissions control system, and was thus completely different from the emissions-cheating software found in the 2.0-liter VW engines."
The ECU he looked at was from his own car, which does use DEF, but also was affected by the recall that reprogrammed it, so it had the affected engine. While many of the affected cars didn't use DEF, some did. And since he could tinker and test with his own car, that's what he looked at.
OK, I thought his was something new.
Seems like the fix for these is easy -- just use the normal dosing regime for the AdBlue and everything should be fine. I'm more interested in what happens with the cars like mine that don't use the fluid, and what the performance and mileage trade offs were to get under emissions targets.
"Audi also shed light on the Auxiliary Emission Control Devices (AECDs) which the EPA had earlier labeled "defeat devices," confirming that the tech was part of a "warmup strategy" for the catalyst in the 3-liter emissions control system, and was thus completely different from the emissions-cheating software found in the 2.0-liter VW engines."
http://autoweek.com/article/vw-diesel-scandal/audi-develops-...