Im a new Cayenne owner as of about a month ago, and got it knowing it would be a bit of a fixer. I've having some AC issues, and saw on here and rennlist over the last few weeks you've had a lot of the same issues.
Basically the AC blows, but it's hot or whatever the outside temp is. The code I'm getting is air quality sensor, but it seems as though, at least in your experience, it was the interior air temp sensor that was your cause. I changed the blower resistor because when I hit the defrost, the blower goes to high but doesn't blow. I have to press it down to one level below high for it to come on. Didn't change. I think I say where I can unplug the ambient/outside temp sensor to bypass something and see if it works? The refrigerant is good, at least as far as the local place goes. Before I just start throwing money at the 3 sensors, I was wondering if you had any potential ideas for me? I don't have durametic so I can't read what the sensors output