01 vw passat is iat the same as air temp sencor iat sencor 1 low input on 2001 Volkswagen Passat

in the book reads iat sencor 1 low input is that the air temp sencor thank you for your time

Asked by for the 2001 Volkswagen Passat
no...iat is not same as air temperature...
then wat is it?