So this is the second day this has happened and was seeing if anyone else has had anything similar happen to them. I have a 2016 Camry LE. Today and the other day while driving, my car has randomly beeped for like a second and then it stops beeping. It's the sound it makes when you leave your keys in the car after it's turned off. A long beeping tone. Everything I go to look at the dash after the sound to see if something is wrong, there's nothing, no lights on in my car and everything seems to be working normally. Could this be a battery issue? Or just a sensor glitch?

 

Push button start? I wonder if the key/fob battery is weak.
I'm not sure about the 2016 but I know on my 2012 there is a little place in the center console where you can put the fob (push button start) and you can still start the car if the fob battery is dead, maybe try that if it starts beeping? Check the owner's manual for location.
The fob/key battery is the probably the easiest place to start...