The sensor is threaded into the coolant passage in the back of the cylinder head.
Cooling fan should come on when coolant temperature exceeds 235 degrees Fahrenheit or A/C or defroster are turned on
The coolant temperature sensor is on the rear of the engine, towards the top near the air intake hose. Move the air intake hose and you will see a single wire connector going to small sensor. The CTS is located on the block on the cylinder 4 side of the motor.
The ECT or the Engine Coolant Temperature Sensor is a switch. This switch is located on the bottom of the radiator in the 1996 Camry.
Coolant Temperature Sensor/Switch (For Computer) ECCS Component Parts Location
That would depend on which temeprature sensor you are asking about. Is it the coolant temperature sensor or the air charge tenerature sensor you are asking about?
Could be the coolant temperature sensor.
P0125: insufficient coolant temperature for closed loop fuel control you need an ECT sensor engine coolant temperature
The location of the coolant temperature on the 1996 Honda Passport is actually behind the alternator. You can see the sensor in any Haynes or Chilton's manual for that vehicle year.
In most cases the single wire sensor runs a temp gauge or temp light. The double wire sensor feeds info to the vehicle's computer and operates relays for the cooling fans. This may or may not be the case for your Saturn.
To the left of the thermostat housing, It screews into the intake water jacket.
unscrew old unit screw in new unit.
It is the two wire sensor next to the thermostat housing.