I'm curious as well, as this happened to me last night after leaving my truck at LaGuardia for four days. Drove it home to CT, and 1/2 it went to red, as I was arriving home, a red water pressure icon was flashing on and off and there was a distinct 'clicking' that came with the light. I was lucky to get it home. This morning, I filled the truck with coolant and 2L of oil and ran it for 20min and it seemed fine, albeit, the 'check engine soon' icon was on. Will take it to the garage ASAP, and the worst part is my wife needs to drive it tomorrow to take her mom to the airport with a lot of luggage