Originally Posted by OhioYJ

OK so first thing I tried was replacing the battery in my key. Note my car is a 2016. Then I tried the other key that has never been used and has never left my safe, same issue. So then I did some testing and found my car has a range of 5-6 feet from both doors, but is almost completely blind from the rear. Which led me to believe it was the rear antenna. The only other problem with my car is the outside door unlock button on the passenger door has not worked for some time. That button has not worked for some time, but its the passenger door so I've let it go. The rear antenna is cheap and easy to replace but if its not that its pretty much the BCM, so much to my dismay I scheduled an appointment for the dealer to look at it since its under warranty.

Dealer claims they put a new battery in the remote and (I only took one key to them) and all the problems went away. When I went to pick it up (two hours after dropping it off) I brought up the other key and sure enough even it worked. So either there is some truth in their batteries are fresher than Walmarts or they wouldn't come clean on what actually fixed it. I think its the latter... But at least it works.