BrianBrave beat me to the explanation that you do indeed have an intercooler. I'll just add that in the dealers' shop manuals it is called "Charge Air Cooler" leading to further confusion.

I went through a similar battle where the dealer insisted that it was the IAT sensor. I finally just put a Johnson pump on (about an hour job for anyone with the ability to use basic tools) and solved the problem myself.

Best of luck!