Mine came on after getting my car back from an oil change/general check up. Figured they forgot to reset the light. Did the reset procedure, and then it still came back. Unpaired the Accessport, reset the light, and it still came back on. No OBD codes, so that's fantastic. I ran a Vehicle Health Report, and it just gave me the generic:
"Powertrain Fault: Illuminates when an electric throttle control, transmission, all-wheel drive, four-wheel drive or fuel system fault has been detected. Contact an authorized dealer as soon as possible."
So, back to the mechanic it goes tomorrow.
Separately, I discovered in my 'alerts' in my system, they turned 'sport mode' on a couple hours after shop hours last week. So I guess they had some fun with the car too, heh.