With these new vehicles having so many electronics and them being so sensitive, it could be almost anything. I just read online that one guy had to have the door wire harness replaced, another said door module, another said door handle. So, no telling. Unfortunately, sometimes we either just live with issues or accept the gut punch and go to the stealership.
I had a 2006 Ram 2500 CTD and the A/C would turn off, the heater would turn on, and the fan would adjust to the highest setting when I simply removed a small piece of static cling tinted film from the windshield. It was the strangest thing. There were certain times of the year when I had to drive home with the sun directly in my eyes and too low for the visor. I had to toss up the static cling tint just to see. Vehicle electronics are just so damn sensitive.