The owner programmable functions randomly reset to another setting sometimes.
My auto-unlock has done that a couple of times.

 

I have the same problems. Do your wipers move a little bit as well when it honks?

 

As stated in the above post, some of these user pragrammable functions sometimes reset for no reason. For example three electronic things recently changed on my rig on their own without me doing anything:

1) The auto lock function on the doors when you reach 15mph stopped functioning. The doors remain unlocked now unless I manually hit the switch to lock them

2) The honk when I was locking the doors with the remote has stopped. No honk when locking with the fob now... The horn works fine otherwise

3) Having to hit the unlock button on the key fob twice to unlock all doors has now reverted to a single push of the button and all doors unlock.

All three of these things changed several weeks ago without any input from me but I'm not complaining in this case. All three changes are a bonus... for me anyway.

Side Note - I'm running a new Die Hard Platinum battery in my rig and have been for about 3 months now. No battery on its death bed here.

 

Mine has always honked! I like it though

 

mine only honks if i hit the lock button twice

 

I programmed mine to not honk when I lock it. It was easy and has worked fine for several months now.

 

My 2010 rubi honks when locked!