While leaving my home in my 2008 porsche cayenne turbo, the car started hesitating and then stalled out with a pdc error. after taking it in to the local porsche dealership they reported finding nothing. the issue would occur 2 more times and i took it to a local mechanic specializing in porsches who stated it was the throttle body. this was replaced however the issue is reoccurring with supplement errors such as chassis and check engine. my issue isn't uncommon please see provided links where others have had the same problems with their pdcc system. http://www.6speedonline.com/forums/cayenne-955-957/200781-3rd-repair-attempt-warning-chassis-system.html http://rennlist.com/forums/porsche-cayenne-forum/699011-pdcc-major-problems.html http://www.renntech.org/forums/topic/45581-warning-chassis-system-on-2008-cayenne-turbo/