I found the Ambient Air Temp Sensor! 2008 ProStar...

[Waterloo]

(06-03-2017 )mikealike Wrote:  I might be a noob here but where does it display at on the 11 Prostar? I've owned this one and never seen a temp display, thanks

It should be on your instrument cluster, the small LED screen that displays your mileage. It should be in the bottom left corner of that screen.