Car honking in the middle of the night.

Started last night at 4:15 in the morning. Woke up to my car honking. Didn’t see anyone around so used the key fob to turn off the honking. Perimeter lights would not go out and VCS or VBS or something like that was showing. This is a 2010 Honda Odyssey Touring Edition with no codes showing and a battery sticker of 6/19. I ended up disconnecting the battery so it wouldn’t drain the battery. I took it to the Honda dealership to see what they had to say. They said it would be a deep electrical diagnostic to determine. Since it runs and drives I needed to be somewhere else first. Running the voltage output is around 14 volts and runs good. After a long drive and shutting down the engine the battery voltage will be around 12 volts. The perimeter lights will come back on. Turning the key on without starting it will have the green drive light flashing green, the ABS will indicate trouble, the transmission will indicate trouble, the VBS will indicate service needed, and there may be other needs. Turn the key off and on again and none of that appears. Very strange. However the perimeter lights continue to stay on and won’t go out. I have to disconnect the battery just to get those lights off. The key fob works sometimes and will not lock the car other times. I’m fairly knowledgeable working on cars but I’m needing help understanding what’s going on with this problem. Any ideas?