2001 audi tt, What in the hell is the sensor at the top of the instrument cluster called or for?...im assuming it has something to do with the climate control? Long story short... Plug that sensor in my engine temp gauge has problems... unplug the the sensor the engine temp gauge displays proper values and seems to work fine.... Dufuq is it, do i need it, and whats the part number to replace it lol... THANKS