2015 Escape, 1.6L Ecoboost. 96K miles. I hear a high frequency chirp (almost a constant squeak) from under the hood when the engine is warm and I'm stopped. It goes away instantly when I put the car into neutral or park. Suggestions?
For a very short time with someone else in the car you could pull the belt(s) and with someone else in the car see if you hear it.
Then you could add just the serpentine, retest and then the AC and test again.
BTW this is also a great opportunity to replace the belts since you're pulling them off.