Originally Posted by ripemeat
a p0021 will occur when either the ocv is faulty OR if the ocv is receiving less than adequate oil pressure. the banjo bolt, which is the same one that feeds the turbo may be clogged. better check it now or your turbo may be in a world of hurt until it blows. if the banjo filter is clean already then replace the ocv solenoid. it being clean doesn't always mean it's working fine.
Oh I know I'm having the dealer replace or remove the banjo filter wether its clean or not to be safe. I really hope my turbo isnt damaged if it is clogged somewhat...