Has anyone had a problem with their outdoor air temperature gauge going haywire? My 98 2.8 A4Q with 83k miles just started doing this: I drove in freezing winter weather along the Great Lakes to Akron, Ohio, on Christmas Day and then ran the car through a car wash so I could see out of it, and the gauge shot all the way from the actual
+23F temp to -58F and back and then all the way down again. The next morning it did the same thing, down and back and down and back again, several times as I drove home on cold, but wet roads. It was ok the next day, when the roads were drier (temps still cold, 20s and lower), but today when I ran the car through another carwash, the same thing happened, with the temp reading going all the way down to -58F.Is this a faulty temp sensor? Where is this thing located? Could it be affected by the car wash and low exterior temperature combination? What's the cost to fix/repair?