My car had to be manually reset after after a low inflation warning. This involves repeatedly pushing a button on the steering wheel to scroll through a menu on a dashboard screen, selecting the category and then scrolling through sub menus. As it is so rarely. needed, I can never remember how to do it so I drive around for several days with the alarm up before working out how to get rid of it.
My wife's car auto-resets after re-inflation but only after driving for a minimum time/distance at more than 30 mph.