Sensor Problem???

For a few days, I've had an intermittent "active brake assist functions limited" warning - goes on and off while driving. I cleaned the sensors but they weren't dirty and the problem continued.
Today, I got the same warning in addition to "active lane keeping assist inoperative" and "traffic sign assist inoperative " - this time persistent (comes on again even after the car is parked).
Any thoughts? Going into the dealer tomorrow.
Thanks.


