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There is 1 coolant temp sensor. The coolant temp sensor is an input to the ECU and one of the determinants of A/F ratio.

There is also a coolant temp sender] that drives the gauge in the instrument panel. It has nothing to do with setting any engine parameters.

bill
 

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theres at least two coolant sensors... one in the coolant pipe in the engine compartment and one in the radiator for the cooling fans. and like bill said theres also a sender in the coolant pipe.

i think there actually might be one more in the coolant pipe... there's so many sensors in that one pipe that its really confusing.
 

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I think my "coolant temp sensor" might be bad. Would that also be referred to as the "thermostat". I had posted a thread earlier saying that my guage works fine, but every now and then when I idle my heating blows cold air.
 

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Discussion Starter #7
nah the thermostat is on the opposite side of the temp. sensors.

its right by the AC pulley, inside where the water hose connects to.
 

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The thermostat is basically a water valve -it regulates the temperature of the engine itself. Senders and sensors send an electrical signal to guages or other electronic devices, like the ecu.
 
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