Intake Air Temp Sensor...

My check engine light keeps coming on. The code i get is for IAT (intake air temp) I kep getting it for a couple weeks. I then cleaned off the sensor and popped it back in. Code went away for about a week then came right back. I tried throwing a different one in and it came right back. Anyone know what might be causing this? It seems to be getting a constant voltage, but i guess maybe theres a short in the wire somewhere? Any other ideas??