I have a heavily (and kind of poorly) modified 2005 sti that I am doing work on right now and it is throwing these codes as well. I looked for the filters as per the TSB and I couldn't find them. I know the TSB said do not remove the other end of this oil line but are there filters in the other end as well?
My biggest problem is that the car is here because the turbo (fp red) is shot ( I mean way shot, so much play the blades have hit the walls and bent/broke) and I want to make sure it's not an oiling issue. Is there any way to check the oil pressure coming out of the oil feed line? Can I just hook up a cheapo oil pressure gauge and turn over the engine?
I hope I didn't get in over my head with this guys car!