Outside air temperature gauge

Parrotguy

My outside air temperature gauge always reads about 10 degrees, or more, below the actual temperature. I had this on my list at the first service, and the dealer said they "reset" the software, but it's still the same. There was an old thread ('09) on this subject but mostly having to do with high readings on hot days, whereas mine is the reverse. Also, it doesn't correct itself after driving for awhile, which some owners have commented. Not a big deal, but I think its malfunctioning and the dealer doesn't seem to want to replace it. Anyone else experience this? Mine's a roadster but I don't think that is relevant. The gauge is in front of the radiator.