Well this is very interesting! i just went out and put it 4Lo and I got the yellow light with 4Lo and squiggly lines with car symbol, I then held the ESP button and 8 seconds later ESP OFF came up in EVIC. So this makes me wonder if this whole time Ive been wheeling it, ESP has not been completely off?!? Not that its ever really affected performance cause knock on wood I havent gotten stuck but I have never felt the ESP system kick in, at all..