That's does not sound good at all.DCA adds an extra layer of safety over FCW to help prevent rear-ending someone if they slow or stop suddenly. Most of the time it works as advertised, but I'm finding it sometimes brakes at wierd times, like when the road is curving to the right and the car is pointing toward a left-turn lane with a car stopped. It thinks the car is in the lane in front of you and brakes suddenly. Also, when driving in the far-right lane and a car in front of you slows to make a right turn, the DCA wants to continue braking even after the car ahead has just about cleared out of your path. At the time I remove my foot from the brake to resume my speed, the DCA brakes hard for another second or two. Not really liking that too much.