First the AC quit working, and then the ultrasonic sensors stopped communicating. It was a week of very hot !00+ degree F driving before I could get the car in for a service center appointment. The AC harness was able to be repaired, but the rear ultrasonic sensor harness had to be replaced. Anyway, if you have some strange gremlins showing up in your electrical systems, it just might be rodents. I now have a bag of moth balls tucked under the plastic cover in the frunk, and ultrasonic pest deterrent devices in my driveway. Hopefully this doesn't reoccur.