So I have a cel for po011. It only happens when I go for a long drive on the highway or or in an 80km zone. It reads camshaft position, advanced over timing, and performance bank. The car runs perfect and there is no changes in performance or anything when this happens. It's a 2010 wrx. Has anyone had the same or similar problems. Should I worry? Oh yeah, I just changed the banjo bolts but did not remove the small screens.