Continuous BUZZ/HUM from HPFP in ACC mode.
 

GTS Owners, do you have a continuous BUZZ/HUM noise coming from the HPFP while the car is in ACC mode? (I noticed this when changing my rotors last night)
To get into ACC mode, press the start button TWICE.
First Press = Radio will turn on.
Second Press = All the warning lights will light up.

GT owners can also do this aswell, turn the key twice to ACC mode(Derp).

I have the HPFP 'chirp' issue with my car and just noticed the BUZZ noise. Last night was the first time I've had the humming sound.

Anyone else have this sound(ONLY IN "ACC" mode)?

HPFP priming?

No idea. The car never ever did the humming before. I'm one to usually listen to music from the car while I clean/detail the exterior. For that I need to window down the windows(2 presses of the START button), it has never had that sound during that time when I did that.
The humming will continue until the START button is pressed a third time - turning the car OFF.