I had the same problem, First open up the hood and remove the engine cover, look all the way to the back of the engine compartment and try to locate a wire harness that is running against the top of the engine and locate a vacuume line which runs with it, this line must be broken causing the center vent from beeing operative, if the line is broken go the auto parts store and buy a rubber line (which will be connected to both side of the line) and that should fix your problem. Do not listen to the dealer.
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Monday, March 30th, 2009 AT 9:54 PM