Same thing happened to me once. I was up in snow country in very extreme temps. Warning come on. I shut the car off, re-started it and haven't seen it again. I've been meaning to put a load on the rear of the vehicle and see if the leveling suspension works, When I try it out I'll let you know via a post on the board. I'll hook up an heavy trailer and put some cargo in the back and see what happens. Had that happen once. Turned off the car and restarted. Went away and never saw it again.