So I'm having this problem with my temperature gauge.... I think. The needle never gets more than about an 1/8 of the way up, nowhere close to even the middle line. This is true even after a 100 mile non-stop roadtrip. I figure this is probably not an accurate read-out of the temp. Alright, so what's more likely here? Is my temp sensor broken, or is it just the dash? How do I tell? Thanks.