I got the P0021 code and researched it. Before I finished my research I had driven it several miles pretty gingerly when I started hearing a pretty quiet "chhhhk" noise as the turbo was spooling. Then I parked it and finished my research, found this thread among others.
So, I checked the two AVCS screens on the front of the heads and they were already removed. But the one on the turbo remained and had some gunk. You could see some light through it, but it was mostly clogged.
Anyway, after I removed the screen and reassembled it I started the car and it smoked bad. I had never seen it smoke before. So, was the screen clogged enough that it wasn't getting enough oil to the already damaged turbo to smoke noticeably and after I removed the screen the extra oil getting through burned? Or did I do something wrong?
Either way, I'm pretty sure it's new turbo time, right?