2007 Honda Odyssey Doors lock/unlock for over 5 minutes

2007 Honda Odyssey

Yesterday I was driving my Odyssey 2007 when the door start locking and unlocking by themselves, every 2 seconds. (Lock, 2 seconds, unlock, 2 seconds.). I stop the van but the problem keep going even with the key out. I've tried to unlock the door manually but it kept going. I restart the van and it kept going for 5 minutes, then it stop for 30 seconds, restart for 2 minutes and stop for good. Now I'm affraid this problem will start when I'm not in the van.