Interesting about locking the door, I once went on a 3 week vacation, unlocked the doors, popped the hood and backed up into the garage 'just in case'. When we got back, car started in a heartbeat, no errors.

The other day the daughter left one of the doors opened wide, I did not see this until about the 3rd day. I shut it and forgot about that until the next day when I noticed 'excessive drain' error when I started, drove for about 15 minutes to run some errands, parked re-started and the error was gone.... nothing since then. Not bothered for now :-)