Question:\n\nOK, so my 2001 s80, non-turbo, "the sled" as it is named has a small\nissue. In the morning, every morning, my volvo will display "Coolant\nLow, Stop Safely" as well as "Coolant Low, Stop Engine" and it is\nswitches back and forth between the two with no consistancy, as in it\nwill switch back and forth like it can't make up it's mind as to if it\nwants me to stop safely or stop engine. Also, I can time it, I drive\ndown my street and as I pass by a certain stop sign, the message will\ngo away and it will not show up again until the next day when I start\nmy car. Also, I have repeatedly checked for fluid leaks and a lack of\ncoolant, neither of which it has. My car never goes over the dead\ncenter of the middle of the temperature guage, no signs of any kind of\noverheating. When I got the car a year or so ago, this reared its\nhead 2 or 3 times, but it went away and I didn't worry about it.\nAlso, my car will turn the fan blowers on in the cabin on by itself,\nno key in the ignition, when it gets hot really outside (80-100+\ndegrees, Socal weather) again sporadically, unrelated I think, but the\nonly other apparent issue with the car. My first inclination is a\nfaulty sensor of some variety, and I know I can swap sensors. Where\nshould I start? Thanks!