Mine does the same thing every now and then. I thought I'd done something to my car after I took a highway on-ramp way too fast and nearly drove it off the road. The car made a weird grinding noise - don't know if this was the ABS, as I've never had a car with it before, and then the TCS light came on. Turning the car off and back on fixes the issue temporarily. I think I'll have the dealer check it out when I'm there next.