Maybe, just maybe, it might mean there's a problem with your ABS ??
It could just be a faulty sensor on one of the wheels, or it could be just an electrical fault. Best thing is to whip it down to your local FIAT garage and get it checked out. Your brakes will still work fine, but your ABS might not.
I'm not sure on the specifics, but I had the same issue on my HGT and it was just a faulty sensor on the offside rear wheel. If I remember correctly, it was a quick job.