Active Noise Cancellation making extreme noise

[j8048188]

So far, I'm enjoying my 2020 FFE, with one caveat:

My commute to work involves a steep mountain climb at a posted speed limit of 75MPH (Usually I climb between 65 and 75mph... 6.4% grade, almost 700 ft climb in 2 miles) As the climb starts, I can hear the motor's frequency become fixed. As the climb continues, the noise gets louder and louder, until it's uncomfortable. My theory is that the ANC is sampling incorrectly and creating a really bad feedback loop. If I crack a window open when the noise gets loud, the extra noise introduced into the cabin makes the super loud resonant feedback go away.

 

Anyone else experience this? My next test would be to pull the ANC fuse before the drive and see if the noise goes away.

Edited August 12, 2020 at 11:05 PM by j8048188

[jeeper1974]

Did you find a solution to your loud noise? I experienced it over the weekend as I climbed a steep hill around 65-75 mph in my 2019 FFE. I thought for sure the CVT was about to explode. I'd let off the accelerator and the noise would die down, then accelerating again it would start to come back.  Would love to find out what it was.  Only have 18K miles on it so it should not have any mechanical issues.

[j8048188]

Only fixes I've found are either varying the engine RPMs by pressing harder or releasing the accelerator pedal ( or cancelling cruise control) or pushing the L button on the shift knob. I've noticed it usually happens only when I have a passenger or a full load of cargo in the car.