Hi this is a common problem with these and and saab engine wich share a similar setup it can be a s simple as an clogged egr but i doubt it it will most likley be the butterfly valves sticking if you have engine code y20dth then you will find this at the front of the engine as your looking at it front the bonnet .there will be 6 torx bolts holding the top cover on undo those take inter cooler hose of and small vacume pipe off on some model there is all so some electronic thing unplug that to.If when you take the cover off you find it very clogged with coke to the righthand side ther will be some kind of lever ran off some kind of servo manualy move lever and see if flaps move and seat properly if not scrap out all coke you can and blow all muck out then get some good carb/carbon cleaner and keep spraying and cleaning till all is clean and moving freely then give it another blow out to remove all traces of cleaner and coke do the same to the cover too and egr vavle.then replace the cover seal with non or semi setting sealant tighten bolts to 15nm.

first check the vacume pump pipes that run off the servo there is a small pipe at bottom of pump that goes to the wastegate of the turbo this often breaks its plastic with 90 degree angle rubber pipe if that ok

when all this done plug into a scanner and clear codes if you can if you have no scanner and its not gone into limp mode then take a steady 20 trip and turn ignition off wait 30 seconds start again and it should clear.

I HOPE THIS HELPS ANYONE WITH SIMALAR PROBS

Edited by vespa_man on 11/12/2010 at 22:24