Cant figure out this sensor

[Beast_TR]

I am trying to find out what sensor is the one that goes in front of the MAF on the intake tract? I have seen it on a few cars but mine does not have one. It looks like there is a grey plug for it though.

 

[BOOSTD]

That is the air temperature sensor. To my knowledge, its not needed for normal operation. I only use it to see what the temperature of the air is thats comming into the engine.

BOOSTD

 

[jimmymopower]

Thats the manifold air temp (MAT) sensor. You should have one on your car, the temp reading the computer gats from this sensor helps dictate air/fuel ratios.

 

[zam70]

It does very little to effect the over all fuel/spark management of the car.....alot of people let them hang loose in the engine compartment. (I personally have mine installed)