Apparently, I need a new coolant temp sensor. Isn't there a "green" one that is better? Does anyone know where to get them and where it's located on the engine?
In case it matters:
04 2.7L --forgot the code#
Car is stock, for now. Waiting on turbos to do other upgrades.

 

its right by your airbox ... unfortunately u have to take the airbox out to access it easily ... you can order it from the stealership ??

 

There is a recall on CTS;
Check with your dealers.

 

Here is a picture for a 2.8 ATQ. It should be about the same on your 2.7. I believe you have to remove the intake tubing and Y-pipe on 2.7 to get to it.

https://www.audiforums.com/forum/members/hxgaser-45299-albums-cts-2-8-atq-110/

 

don't forget a new clip + o ring

 

I think I see it next to the passenger side turbo wastegate? Time to get a manual, I guess. Thanks everyone.
BTW, found it here,
http://www.audipartssuperstore.com/c...cPath=23_36_76
includes o-ring and clip too.