my s300 came in this morning and tuneing the car wasnt to bad until my IAT sensor threw a code . like my post says its reading 129.4 degrees F and i cannot figure out why and the car will not run right until i can fix this problem? should i replace the IAT ? also theres only one screw holding it into the intake manifold may that be the problem ?

 

bump, having the same problem right now! Changed sensors and its still doing it..

 

do you have the wrong plug to it.
had this happen to me and change the sensor and flip the iacv plug and iat plug
I would take it out to check it cause mine was all melted.

 

^this guy

 

FYI: Wires running to IAT are generally primarily Green & Red.