I have a 96 passat TDI that is going into limp mode. sometimes the check engine light comes, sometimes it doesn't. tried to scan for codes but unable to link to the ecu. replaced all the vacume hoses, including the one in the ecu. but no change. changed the n75 soinoid and the egr solinoid. still no change. cleaned the intake manifold , still no change. don't know where to go from here. I find it very frustrating not been able to access the ecu and check for codes, because i don,t like changing componants as a form of troubleshooting. any suggestions would be apprieceated
thanks
thanks