The problem with that temperature gauge set up is there is only one sensor for the temperature gauge and to tell the computer the temperature of the engine. When the coolant temperature sensor goes bad they read colder coolant temperature then actual coolant temperature. So the radiator fan will not come on when it should and the temperature gauge will not show it is running too hot. Also, if you have a bad radiator and it is not holding the correct pressure it will let coolant come out of the cap even if it is not running too hot.
Monday, June 12th, 2017 AT 12:45 PM