The passenger side sliding door would not respond to any button pushed to open the door. Once I get it manually opened, it will not latch upon closure resulting in a beeping and warning in my dash. I can turn off power doors and manually force it to shut and most of the time that works but this specific incident it was not working. I ensured that there was nothing blocking the door from shutting and finally got it to shut and latch. I drove out of the location I was at and the sliding door flew open at about 20mph.