I believe it turns on and off the fan (1 out of 2) that cools the engine according to the temperature it's at. If it doesn't work the engine may not know to turn the fan on and the engine could overheat. Here's a tip. When you turn on your A/C or Heater, both fans come on. The A/C cooling fan and the Engine Cooling fan.
The coolant temperature sensor of a 1998 Nissan Altima is located beside the upper radiator hose. It constantly updates the vehicle's computer about the engine's temperature.
The 1995 Nissan: temperature sensor is located on the front of the engine. The coolant temperature sensor will be near the thermostat housing.
The engine coolant temperature sensor and coolant temperature gauge sender are located on the passenger's side of the engine, under the intake manifold.
located at the bottom of radiator
The coolant temperature sensor, on your 1999 Nissan, is located a few inches above the water pump. The sensor will have two wires going to it.
where is the oxygen sensor in a 1998 Nissan altima 2.4gxe
In a Nissan Altima.
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I HAVE A PO725 CODE IN MY 2005 ALTIMA, WHERE IS THE ENGINE SPEED SENSOR AT,THANKS 2.5
behind the engine sensor at top of the back of the transmission