Do any one of you know where the Nissan Altima 1995 water temp sensor is? Do yo know how I can figure out of the two radior fans are not working due to the sensor or the fans are defective?

If you mean the cooling fan on the radiator, the computer grounds the fan relay when the fan is needed. If the engine temp reaches 220 degrees or you turn on the ac and the fan does not come on, check the relay first.

You have quite a situation. It sounds as though the Coolant Temperature Sensor is faulty. That sensor will control the temp gauge in the dash as well as control the cooling fans when necessary. As to why the fans are constantly running whether the switch is on or not would mean that there is power to the fans bypassing switch, possibly from another connection in the harness. First off I would try replacing the fan relay, it may be stuck closed, just switch it out with another of the same type connection from the fuse box to see if there is any change. If that doesn't work then I would check to see if the wiring from the coolant temp sensor and the fan switch run through the same area of the harness. Its possible that you may have a short circuit at that point. That may possibly explain why the gauge is reading hot when the motor in fact is not. Hope this helps. Good Luck.

Remove the intake manifold ,remove radiator ,remove radiator intake and outake housing, remove fan ,remove all belts: power steering, alternator and if you have a/c, remove harmonic balancer ,remove timing belt covers, remove timing belt remove intake housing once you have remove all the above, your engine will look naked, you can see the location of the knock sensor is locate in the engine valle.

try the temp sending unit on the engine head.next to thermostat.

hi to me this sounds like its the oxygen sensor (or lambda sensor for its proper name) The reason i say this is that if your car runs fine from first starting or cold but then starts playing up when the engine is up to running temp then this points towards the o2 sensor due to the fact that the sensor only starts working when the engine is at a certain temp so if this is when your car plays up then this is what i would get looked at first.

Let me know how you get on or if you need further assistance ok

this code is telling you something is wrong with your EGR temp sensor circuit, this is due to an extreme low or high voltage detection from the sensor by your cars ECM computer. check the harness connections or check/ place your EGR temperature sensor, this should solve your issue, thanks

Fuel temp sensor is inside of the gas tank attached to the fuel pump housing.

for the fans check the ect, engine coolant temperature sensor. located on the thermostat housin, this tells your computer when the temperature is at 228 degrees f which turns on your fan. if the gauge is reading hot it could be either the temperature sensor on the radiator or you have an after market radiator cap(checkers, autozone, pep boys) whatever but the dealer cap will make the temp. read right. the tach is gonna be your crank sensor or cam sensor and your shift codes should be your tranny sensor, not the shift nuetral safety switch.

Call up the dealer and ask what commands the fans to come on once the car reaches operating temp, on alot of imports, there is a fan control box of some sort that actually sends the sig to the fans to come on.

If it's the temp sensor and the computer tells the fans to come on you could be looking at a faulty computer.

This would deffinetly be worth taking to the dealer to diagnose so that you don't keep wasting your time and money chasing a ghost.