2020 TESLA MODEL S Forward Collision Avoidance Adaptive Cruise Control Problems

Since the installation of software version 2024.27.25, which includes FSD version 12.5.4, on Sept 26, 2024, any driving which occurs on FSD results in emergency braking events for Green Lights, unprotected/unsignaled crosswalks without pedestrians present, Parallel Parked Cars not encroaching on the lane of travel, vehicles traveling the same direction and similar speed (+/- 5mph), not encroaching on my lane. These frequently reoccurring events were not remedied by any of the subsequent updates received: v2024.32.10 (FSD v12.5.4.1) on Oct 8, 2024 v2024.33.5 (FSD v12.5.4.2) on Nov 2, 2024 2024.44.25.2 (FSD v12.5.4.2) on Dec 10, 2024 While not all events occurred with surrounding traffic, those that did posed a hazard to not just occupants of my vehicle, but those in and around other vehicles, including pedestrians. Most other drivers do not expect and are unprepared for a vehicle to apply panic-level emergency braking and come to full stop at green lights,...

In all assisted driving modes except Full Self Driving (FSD), the car properly displays the speed Limit it has determined either by Map data or visual confirmation. In FSD, apparently only on pre-2021+ Model S cars, the determined speed limit is not displayed. In my town we have a US60 route. The car sees these signs and determines the speed limit is 60, even though it is only 35. The driver notices a rapid acceleration and may observe the set FSD speed has changed to 60. There is no Speed Limit displayed in this mode. Very dangerous to go this fast on a 35 MPH road. When not using FSD, the car does show this error in the speed limit as being 60, even though the car determined speed limit itself is in error.

Setting: Adaptive cruise control, 70 MPH, no nearby traffic, no nearby bridges or overpasses, no visible obstructions, straight highway, daytime, clear skies. Incidents (multiple): Unexpected, inexplicable braking. During one of the incidents, there was a splotch of some sort on the road (perhaps spilled paint). During all other incidents, there was nothing obvious which could explain a misperceived need to brake.

Error message popped on my screen steering might require extra force and shortly after that I lost power steering, cruise control, automatic emergency, braking, forward collision warning land departure etc. Contacted Tesla service to acquire about recalls since I remember reading about it.

From Aug 23 to 28, 2023, we traveled in our 2020 Tesla Model S Long Range Plus vehicle from Santa Fe, NM to San Diego, CA and back, for a total distance of approximate 2100 miles. We drove primarily interstates (I-25, I-10, I-8, I-5) where speed limits ranged from 55 to 75. We experienced numerous instances of what is known to Tesla owners as sudden, severe "phantom braking" [hereinafter PB] while the cruise control was activated (not AutoPilot, nor FSD, just cruise control). In ALL instances, no cars or other objects were visible within 1 mile ahead of our vehicle, and in ALL instances, these "phantom braking" incidents happened on absolutely flat, straight, smooth road surfaces, at all times of day, morning, noon, and night. This car has had PB problems since the day was purchased; in fact on that day, there were at least two sudden PB incidents while...

Driving on freeway speed 80mph with no other cars around the car slammed on brakes while on cruise control. It was able to accelerate and the next time I put the cruise control on a few minutes later it slammed on brakes again. Car clean no warning that it was trying to avoid an unseen object. Drove rest of the way without cruise control on and no problems.

While driving today on I-25 northbound at approximately 9:50 am from Albuquerque to Santa Fe we had the cruise control set at 85 mph. There were no vehicles or obstacles in front of our 2020 Model S when the automatic braking suddenly engaged bringing the vehicle to a sudden stop. Multiple vehicles behind us had to make emergency maneuvers to avoid hitting our stopped vehicle. The vehicle was set on cruise control, NOT full self driving. This type of life threatening malfunction is not acceptable in a $100,000 vehicle. The car was serviced 1 week prior to this incident at the Tesla service center in Pojaque NM. There were no warning lights, messages, or other notifications prior to the phantom braking incident. We plan to sell the vehicle as we no longer feel safe driving it.

The contact owns a 2020 Tesla Model S. The contact stated while driving 75 MPH with the Adaptive Cruise Control activated, the vehicle inadvertently decelerated to 52 MPH. During the failure a second vehicle nearly crashed into the rear of the vehicle. The contact indicated that no warning lights were displayed. The failure occurred on several occasions. The cause of the failure was not yet determined. The manufacturer and local dealer were not notified of the failure. The failure mileage was 30,000.

I was on the interstate with my cruise control set at 75 mph. Traffic was normal when all of a sudden the brakes were applied and my speed quickly decelerated by at least 20 mph. I immediately physically applied the brakes to disengage the cruise control and immediately speed up again so that I would not get rear ended by the car behind me. This event happened 5 more times through my road trip while I was using the autopilot AND cruise control.

While using adaptive cruise control on the highway. During the day. I experienced multiple instances of unnecessary braking. Once when another car was close behind me. I think the car was overreacting to passing cars or shadows or dips in the road. It did not seem to happen while driving at night. At times it happened about every fifteen minutes. At other times it would be about once an hour. Sometimes the car would recover and accelerate again quickly and at other times I had to step on the accelerator pedal

The tesla full self driving was on and it turned my car into the guardrail in the middle of the highway all by itself for no reason at 70mph. It looked like a truck was turning into my lane and instead of stopping the car swerved into the grass and I hit the guard rail. The car was totaled. I have a video of the incident. This is one of the videos: https://www.veed.io/view/8e44fe01-a7ab-457c-90ee-4f7089bfe33c Full self driving was on the whole time. When I tried to take over it was too late to stop it and the brakes did not work or stop. The airbag did not go off. There had to be an error with the full self driving that decided I should go into the guardrail.

While driving with Autopilot engaged the car applied the brakes suddenly and severely without warning. This has occurred on multiple occasions at freeway speeds and at surface street speeds. There was no apparant reason to apply the brakes and no warning.

The Tesla when driving at 35 mph on AIA at or near the speed limit frequently has quick sudden phantom braking and acceleration. I have analyzed and believe I know the reason. There are many driveways. When cars enter or exit, these phantom braking events occur. Most often when another vehicle ( in front of the Tesla )enters a driveway and is moving away from its lane, even if its tail light is in the bike lane (which is a painted narrow lane on the right side of the road) the Tesla will suddenly brake (flashes simultaneously a red dashboard image for following too close and then accelerate). At the instant of the following too close warning the lane in front is totally clear. It happens so fast that if cars behind are not being attentive they close too close to my vehicle and then set off a warning on...

The latest tesla update has caused significant increased number of "phantom breaking" episodes when using just cruise control on state highways. I had at least 10 episodes on my last 100 mile drive (not using autopilot, just cruise control). Worst events caused rapid breaking from highway speed of 65 mph down to 40-45 mph with warning messages and audible alarms. Non of the events needed breaking. The worst two events were on straight sections of road with no oncoming traffic or other potential obstruction. I do not feel safe using cruise control on the freeway.