My Check engine light is on and the auto people tell me its a problem with the air idle temperature. I'm not sure if I need the sensor or the control valve, so im going to do the sensor first since it is cheaper. Anyone out there have any idea where it is, or have a schematic diagram for me to look at so I know where it goes? Any info would be great!

 

this is typically on the throttle body, or very near it.