Front air vents by fog lights stuck open?

Those are louvers that open when the battery needs to be cooled via the two radiators. They are normally closed for better aerodynamics if the battery temp isn't too hot. Are you looking at them after driving, or after many hours sitting while not charging? If the position never changes, the actuators might not be functioning, but BOTH of them not working would be very strange. There is one very large connector under the passenger side headlight that connects all the "stuff" in the bumper. Do the lower running and cornering lights turn on? If none of that works, I would check that connector.

Or just take it in for service.

I'd call the service center and have them check your codes. The louvers have feedback and the car does record warnings when they are not operating properly.
I've got one of those motors on my bench, having fun learning the codes to make it run outside the car.

Definitely have them checked out. The only time I've ever seen mine open is while Supercharging when it's going full blast on the cooling system. Once it starts to taper, the louvers close.

I have never seen mine opened except once. It was in the middle of a heat wave last summer and I turned the a/c on full and noticed one of the two was opened.

I've seen these broken while at the service center, so yes- they can and do fail sometimes.

Indeed. Ask them to run a thermal test on the system if you are unsure.