[JABCAT]

About 3 hours into my 3.5 hour drive today I was coming up on interstate traffic with the ACC activated when my car started accelerating instead of braking. The ACC was set at 78 mph and the car accelerated to 84 mph before I slammed on the brakes. The ACC had worked normally the entire drive up to that point. Once traffic opened up I hit the resume button on the steering wheel and a warning message popped up in the cluster & on the screen that said "you can continue driving. Check sensors or clean them" It also had a picture of the front of the car with a red square covering the area of the sensor.

Has anyone had this message pop up before? It did rain yesterday & this morning so the car is dirty, but that's the first time I've seen that message in 20k mi. I would also think if the sensor was dirty/obstructed it should have popped up a warning at some point when I was driving? The acceleration above the set speed limit is also concerning.