Hello guys, I have a Passat 2.0 FSI ( BLR engine code, 110KW- about 150hp) and I have some issues with my car. Some times ago, at each 300km error P0420 comes in, connect VCDS- clear code and all run good for like 300km. After this, a power loses come and error come in. I saw a post on this forum, and PCV valve was replaced ( not cracked, but old rubber wasn't in good condition), after this the car run good for like 1000km, but a little power loss is still here.
This days a check engine light appear, I connect VCDS and saw this error code:
P0420
P0441
P0507
And for sure, a lose power comes with this error.
Can you please help me with this problem? I still think is a problem about vacuum or PCV, I really don't know.
PS: For this engine, PCV is fix on upper cover of engine (rocker covers- google translate), so I replace just membrane of PCV system.

Thank you in advance and I`m sorry if I was wrong in my description.