Where is the coolant sensor located in a 94 cavalier and is it hard to replace by your self?
It is on the top of the engine right above the thermostat. If you look where your upper hose fastens to engine it is the thing on the aluminum cover that has wires going to it. I have replaced mine but it still fluxuates back and forth. The water pump is probably your best bet if it keeps acting up. It is easy to change the sensor but do not overtighten. The cover is aluminum and will strip out easily.