Car has 600 miles on it. I have had the overheating idiot light come on and temp gauge shoot up and come back down. There is a loud tone when the idiot light comes on. It stays on maybe two secs and the amber temp gauge goes all the way up and then right back down. This has happened twice. The car is not overheated. It is in 90's here and has been but it never overheats. Anyone else had this issue?