2019 TESLA MODEL S Forward Collision Avoidance Adaptive Cruise Control Problems

Tesla’s software updates have rendered systems useless the vehicle wants to hug and sometimes cross the left double yellow lines. It cannot hold a constant speed and since their implementation of “supervised” full self driving, have made my vehicle unsafe

My Tesla supervised FSD is a safety hazard. Promised programming updates have not improved the erratic, UNSAFE “assistance. I try it after each update, but I’m afraid to rely on it other than 5-10mph bumper to bumper road conditions. I don’t have one specific occurrence to report and thank goodness no fatality!

The contact owns a 2019 Tesla Model S. The contact stated while driving 76 MPH with the adaptive cruise control activated, the vehicle experienced phantom braking and decelerated to 45 MPH. The contact stated that the cruise control function then activated and operated as designed and the vehicle then regained speed and accelerated to the desired speed. The failure occurred twice within 20 miles. The contact stated that during the first failure, there was no other vehicles nearby; however, the contact had passed another vehicle the second time the failure was experienced. The dealer was made aware of the failure; however, the mechanic was unable to duplicate the failure. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 24,500.

driving on the HOV lane, no traffic at all, and the tesla applied the brakes x 2. It happened today at 4:03 pm.

WITH INCREASING FREQUENCY IN RECENT WEEKS, MY TESLA BRAKES WITHOUT WARNING. IT SEEMS TO OCCUR WHILE UNDER ADAPTIVE CRUISE CONTROL. AT TIMES THE CAR IS APPROACHING A ROAD SIGN. AT OTHER TIMES THERE IS NO REASON APPARENT TO ME. THE ADAPTIVE CRUISE CONTROL WORKS WELL OTHERWISE.

The car would apply the brakes for no reason while using cruise control.

HUNDREDS of times this car (as well as our other Tesla Model S) would brake hard for no reason, usually on the highway. Often there was no car nearby and no bridge ahead so we have to guess that it's due to the sky. The car will often go from 75 mph down to 25 mph in seconds, sometimes with tire squealing noise. When it happens now we instantly look into the rear view mirror for traffic that might hit us, and we hit the accelerator if necessary. If nobody is behind us, we let it play out to see how slow the car will get. 25 mph on an interstate, which is usually where this occurs, is unsafe. Recently my wife saw an approaching truck that would have hit her had the truck not been able to change lanes.

This is my 6th trip with 2019 Tesla S from Chicago to San Francisco / 1st time SO MANY “PHANTOM BRAKING” incidents / FLAT TIRE WARNING error / screen shut off 3 times …..