Why is my IAT sensor reading crazy values?
 

GM open element, using stock car wires, shared between the two ecus.

In a 20-25ºC ambient temp, the ADC value thrown by the sensor is something like 3500+ ADC, and does not match with a "normal" calibration.

Has to be a connection problem... Maybe ground loop interference? Which ecu is supplying the current to the sensor, and which is supplying the ground?

Resolved. I was sharing the GM IAT sensor between the two ecus. Switching it only for the adaptronic and the problem goes away.