What does thermostat sensor do?
What does thermostat sensor do? The sensor works by measuring the temperature that's being given off by the thermostat and/or the coolant itself. From there, your vehicle's computer will use this temperature information to either continue operating or adjust certain engine functions, always working to keep the engine temperature at an ideal level. Is the thermostat failing or sensor or other? But, the temp gauge shows cold and the engine didn't seem terribly hot. Oh, and the fan is kicking on which it rarely does otherwise. Which do I believe? How much does it cost to replace a coolant temperature...