Intake Air Temperature (IAT) Sensor
WARNING: This page is about a different car, the 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The IAT sensor is installed in the air cleaner outlet tube. The IAT sensor is used in determining electronic pressure control (EPC) pressures.