Code P074, Intermittent Intake Air Temperature (IAT) Sensor: Notes
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
This test monitors IAT sensor voltage. Code P074 will set when PCM detects a large change in sensor output voltage in a .25-second period of time.