Yes, mine does that. I was reading the owner's manual and it says you get that error beep if you are too close to the window and the car can't verify that the key is outside the cabin. You also get it if the key is too far away from the car during the arming period. I have been trying to notice if I am doing something differently when I get the error beep, but so far have not figured it out.
then hear the multiple beep and go back to the car to manually lock it (fob is usually less accessible somewhere in a pocket).
Yep. That's what I meant when I said "manually lock the door."You know you can press the black rubber button on the handle to lock the door......