The coolant temperature sensor can be found on the front of the engine, near the thermostat. Remove the coolant temperature sensor retaining nut, to replace it.
Replace your Engine Coolant Temperature Sensor. Visit Saturnfans.com for help in diagnosis
The sensor is threaded into the coolant passage in the back of the cylinder head.
Engine coolant temperature switch/sensor
Replace the engine coolant temperature sensor. Your car has two, replace the one with the 2 wire connector
on the right side of the engine
Engine Coolant Temperature Sensor.
Replace your Engine Coolant Temperature Sensor. Your car has two, replace the one with the two wire connector
Faulty coolant temp sensor can cause the vehicle to run poorly, if run at all. If you are leaning toward replacing the sensor you will be happy to know the sensor is relatively cheap, around $12, and simple to replace. Please visit my Bio for a link to my saturn help site for image of where the coolant temperature sensor is located.
under the backseat and you just pull it out and put a new one right back in
Start by replacing the Engine Coolant Temperature Sensor
12 bucks Autozone