I had a similar experience. The bolt didn't fall out before I discovered it, but was loose enough to cause the light to stay on. Check the sensors first, easy stuff.I had trouble with my light staying on. Turned out that when I changed the rear tire and reinstalled the sensor, I got interrupted and didn't torque the bolt that holds it. It fell out 30 miles later.
If the light doesn't go off at about 3mph, the ABS unit is malfunctioning and you have normal brakes, not ABS. You didn't by any chance pull a fuse to turn it off and forget to put it back did you?
Check the preload on the shock. If you can't crank it up to display five lines, the hydraulic system may be leaking fluid.Thanks GW, I will keep an eye on the stand, maybe it was my new boots...hehe! Man, now I'm leaking. I think its coming from my right shock area, up high.