Ok guys just picked up a 04 A4 convertible with 24k on the clock last weekend. The car fax checked out fine but now i am getting a check engine light the code is 17105/P0721
Sender For Transmission output RPM G195 Implausible Signal The Transmission Control Module is not receiving an indication of vehicle direction. TCM problem? or Control Module? any help would be great on this one.

 

Search for CVT problems on the forum, you will get tons of results.