1996 Saturn SL2 starting the car

Sounds like a bad coolant temp sensor that's screwed into ur head below where ur upper hose goes on to the head. There's two wire going to it a yellow one and a black one. When u remove the connector look and see if it's corroded if it is u will have to replace the connector. Make sure the car is cold and u will loose coolant. The sensors crack and leak coolant into the connector. If u replace the sensor make sure u get a brass tipped one the plastic tipped ones crack. There under 20 and that's ur best bet for ur starting concern. Let me know what u find.