The one display setup I download illuminates the numerical values in red if there is any issue and green if it is fine. For example, if the AFR's are in a deadly area, it will go red. Well this morning, the entire drive to work, it was pretty cold out, and the IAT read from 15 degrees to 18 degrees. Why would it find any issue with a cold intake temp?

 

lol. it's fine. it just goes red when it's reading extremely cold iat's or extremely hot iat's.