That is your "Walk Away Locking" telling you it is NOT locking. If it is working "properly". That alert is saying, you left it running, or the trunk is open...etc. But it also fails a lot when it cannot detect the keyfob as you exit. There are varying degrees of satisfaction. For me, it rarely works properly and I wish Honda would allow the user to disable it. But you are stuck with that alert for life of ownership.
Here is a thread
http://www.ridgelineownersclub.com/...b-s/160114-walk-away-locking.html#post2347858
Here is a thread
http://www.ridgelineownersclub.com/...b-s/160114-walk-away-locking.html#post2347858