I thank everyone who replied to my initial post "Alarm in 2005 Sonata".
Now I have a separate problem with the alarm/door locks in my 2005 Sonata. The problem is associated with the Passenger Door. It executes a 'door closing request' without anyone asking for it. Examples: * passenger opens his door to get into the car. As soon as he enters and closes the door, the door executes a 'door closing request' without anyone asking for it. * when the passenger opens the door to exit the car, the door executes a 'door closing request' and the door gets locked again.
These examples have a certain amount of randomness - but they occur about 85% to 90% of the time.
I have no idea where to look for the problem or where to take the car for repair.
Thanks, Ogato