Hey everyone, so I have some problems here and need some help. 2004 FXT AT with vf43 cobb v2 st2 with supporting mods. Its a long story to how i got to those mods but ill try and keep it short. We bought our FXT used with 76000 miles, one month after having the car the turbo blew up along with codes P0011 and P0021. Went to the dealer they did all the work to replace everything. Got the car back and one month later again, the turbo goes out along with code P0021. This time it was personal! I took it upon myself to do all the repairs but in the process upgrade the car as well. I found the TSBs about the filter screens for the AVCS and turbo so I went ahead and removed those from the system during the repair. I know my way around subaru engines having owned a 2004 wrx myself (highly modified). All my repairs went smoothly, they are as follows....VF43, Cobb AP w/ ST2 93 map, catless DP, Invidia UP, larger TMIC, 3inch to 2.5inch at axleback for exhaust. NOW THE PROBLEM, everything is running great except it keeps throwing P0021!!!!!! I have no idea why this is???? Possibly because the screens are removed or what? I have searched and searched and can't figure this thing out. Somebody please help a Fozzy Fan out here!