I went out to our garage this evening to plug my Clarity PHEV in for the night. It was last driven at least 5 hours before this and everything was powered off. However, as soon as I opened the garage I heard this weird motor noise coming from the rear end of the vehicle. I did not have the key fob with me, so nothing should have gotten powered up. Here's a short recording I took of the noise. You may need to turn the speakers up. It was louder when I peered underneath the car. After I opened the car door and popped open the charge panel, the noise stopped. Anyone come across this before and can help me identify it? Never had a car spontaneously start up without the key, so to speak.