2020 TESLA MODEL 3 Vehicle Speed Control Problems

The newer versions of FSD do not allow driver control of the max speed. The current versions allow you to set a maximum speed with a scroll wheel on the steering wheel.

Incident #1 Vehicle sitting at a red light. After several seconds the vehicle operating under Tesla FSD suddenly started to drive as if the light had turned green, which it had not. I stopped it immediately. Incident #2 Vehicle was stopped a t a red light and started forward again as it the light had changed but had not. I noticed a flashing red light at the next intersection a few hundred feet away. So, I went around the block and tried again and it behaved the same. After a few seconds it started to go again. There was not another light near where the first incident occurred.

Vehicle must have thought a shadow line in the road from a bridge indicated a wall I was about to hit, as it slammed on the breaks in the middle of the freeway. Car behind had to swerve to avoid. On the same trip, several nags of 'keep eyes on the road' were incorrect, as my eyes were directly on the road, but phone was in hand functioning as a microphone taking voice memos. Car proceeded to shut itself down while in the middle of the freeway, causing me to go slower than traffic and put me in danger as cars behind me had to swerve or lane change to avoid me as I tried to pull off to the shoulder. These forced shutdowns from incorrect 'nag fails' are causing safety issues. Nag failures should not forcibly shut the car down. Not sure if this is being enforced by NHTSA,...

I am filing a complaint regarding a serious safety issue with my 2020 Tesla Model 3 Standard Range Plus. While driving on the freeway, the car displayed a “Power Limited - OK to Drive” message, followed by “Power Reduced,” and then automatically limited my speed to 60 mph. This happened unexpectedly on a busy freeway, nearly causing an accident with a car behind me. The message advised that “exiting and re-entering the vehicle may restore operations.” I took the freeway exit and exited the car, re-entered, and resumed driving, but the error returned, reducing my speed further to 58 mph, and at one point, down to 7 mph. This behavior makes the car unsafe for freeway driving, as the speed can drop suddenly, putting me at risk of a collision. This issue persists on city roads as well, with speed reductions happening within a mile of driving, restricting the speed...

The Tesla is reflecting an error “DIR_a126” that is reducing the speed below the speed limit and with no rhyme or reason. Tesla services are not available and the problem is intermittent. Additionally, based on research it is found to not have consistent resolutions and reasonings

I took delivery of this Tesla Model 3 last month and have been using it often for my commute. Tesla’s “Traffic Aware Cruise Control” is dangerous and has put my life at risk multiple times now when driving on the highway at night. It slams on the brakes as if it is about to crash when nothing is ahead. It also slammed the brakes when passing a semi truck that was accelerating from being stopped on the shoulder. If anyone was behind me, they would have crashed into me. This “phantom braking” only happens at night. I would disable it immediately but it is not able to be disabled! This is the most frustrating part. I have a long commute on the interstate at night and really need cruise control, and now I am constantly worried when commuting that the car will slam the brakes. The fact that I can’t...

While operating TACC with lane keeping assist, I experienced multiple iterations of phantom braking when the road and weather was clear ahead. This phantom braking could potentially cause other drivers to collide with the vehicle that unexpectedly braked in the middle of the highway. This problem has been a common issue with multiple people taking their cars to the service center to get checked out with no problem identified. There are no warning lights or indicators that the Tesla is going to phantom brake on the highway. Recommend having Tesla provide information regarding this phantom braking.

We had Model 3 with instance of unintended acceleration at the gate of a parking lot. This car was bought in May 2020. On December 6, 2020, she was on the way out of the parking gate and suddenly the car accelerated, hitting the side wall of the gate. The car flew over a two-way street, resulting in a compound fracture of her right hip requiring internal fixation and transfusion. The vehicle was inspected by the police. There were no warning lamps, messages, or other symptoms prior to failure.

I was already situated in the left turn lane on a two way city street, slowing down, and about to come to a full stop before making a U turn when I felt a surge in power before the car picked up, accelerated uncontrollably, and launched forward. In front of the turn is a raised cemented median strip divider where the car hit and went on top of it. Instinctively, I just held on to the steering wheel firmly to keep the car straight so that it will stay on (top) and within the divider and not veering to the right or left and running onto incoming traffics on both sides of the street. The car came to a stop after coming off the other end of the divider (approximately 100 ft) and ended on one of the lane from the opposite traffic. Thankfully there were no cars on that...

I've had the car since December 2019. The car will "phantom brake" when the autopilot adaptive cruise control is on. This happens intermittently, ~1 time per month on my normal commute. I will be going along, cruise set to 75 and out of nowhere it'll slam on the brakes and lose 10 MPH in a second before I can take over. This occurs with absolutely no traffic or reason, it'll be an empty highway and it does it. I drive with my foot over the accelerator so I can floor it to override the car. This is the exact opposite reaction I would think that someone should have to do with a safety feature. Tesla tells me the system is working fine, but random brake checks on the highway should never be normal. I don't understand how this system was approved to operated by the government.

On 9/3/23 we were traveling from Moab UT to Green River UT and the cruise control was engaged at highway speeds. We were not using the "Autopilot" functionality. Without warning, the car suddenly decelerated under what felt like hard braking. There was no warning immediately before the hard braking started and the car had no warning indicators of any kind either before or after the incidents. The hard deceleration happened at least four times. One of those times a raven flew up from the road, but the other times there was nothing in the road. At least three of the incidents occurred on highway 6 traveling north. The last time it occurred was on I-70 westbound after we stopped the cars and cleaned all the cameras and ensured there was no debris on the front bumper which could cause issues with the forward-looking radar. We lost confidence in the cruise...

Sudden acceleration while driving and at stop sign

Sudden hard "phantom" braking while in adaptive cruise control. This put myself and other drivers in danger of a collision. The problems been reported to Tesla, but as of yet not fixed or inspected.The problem seems to be completely random with no advanced warning of any kind.

While driving on the freeway, my 2020 Model 3 “phantom braked” multiple times while using the cruise control. No autopilot for lane keeping assistance. There were no cars in front of me or any hazards. The pavement was pretty new. I was using this feature earlier in the trip with no issues then it started all the sudden with multiple incidents in a short amount of time.

Phantom Braking occurred almost 40 times on our recent trip from Northern NV to California and return. We left on July 16 and returned on July 21. Our route was from Minden NV to Las Vegas on Highway 95 and then onto Temecula CA on Highway 15 and 215. The return trip was on Highway 15 to CA 138 to Highway 14 to Highway 395. All travel was during daylight hours. Sometimes phantom braking was so severe, the deceleration cause us to be thrown forward towards the dashboard. We wore seat belts to prevent hitting the dashboard. This also happened on a similar trip in 2022 and was reported to Tesla and were told that nothing could be done. The current software version is 2023.20.9

my son-in-law went straight off country road and into a tree car burnt to ground was burnt to death date was [XXX] sheriff Spokane county investigating teal front suspension repaired 1 month before at local Tesla shop Spokane wa INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6

Unexpected Phantom Braking was experienced in this vehicle on a sunny day at mid day on I-30 going East through Arlington. The car was operating on Traffic Aware Cruise Control. Travelling at approx 70mph the vehicle suddenly slowed very quickly below 50 mph before I interceded to resume control of the accelerator to resume my speed before I was rear ended. This occured as I was approaching an overpass in my middle lane.

Had cruise control on and “phantom braking” occurred about 10 times on a 22hr trip from California to Oklahoma. Very scary. Car went from 80 to about 40mph in seconds. How is this even possible for Tesla to have these vehicles on the road? I’ve only had the car for 2 weeks.

I was driving from indio,ca to Orinda,ca on interstate 10-210-5 north and the vehicle had at least 6 phantom braking events when the car was in cruise control and one event the auto pilot was on. There was clearly nothing front of me. This is so dangerous and there will be a bad accident if it isn’t fixed. Please have Tesla fix this.

The contact owned a 2020 Tesla Model 3. The contact stated while pulling into the driveway and depressing the brake pedal, the vehicle failed to respond, accelerated unintendedly, broke through the garage door, and crashed into the vehicle parked inside the garage. The other vehicle moved away and damaged the garage. There was no warning light illuminated. The air bags did not deploy. The contact shifted into reverse (R), pulled out of the driveway and shifted into drive (D). The brake pedal was depressed but the vehicle failed to respond. The contact stated that he hit the curb to stop the vehicle, and the vehicle stopped. The contact stated that all the air bags then deployed. The vehicle failed to unlock. The contact rolled down the windows and cried for help until the neighbors arrived and opened the vehicle from the outside. The contact sustained bruises on both arms, and...

on July 19,2022, when I was driving on driveway, at less than 5 miles, I tried to stop to drop my wife and applied brake. Instead of brake, due to computer mal function, it accelerated & hit the garage door, broke the garage door, door fell on the car parked in the garage, damaged that car,and tesla automatically reversed. while reversing brake wasn't working too so I tried to put in drive & brake still was not working so to stop the car for safety, I hit the curb in my front yard All airbags were deloyed, inuring both of us. All doors were locked & we couldn't open any of them. We could open windshield. We shouted HELP and my neighbor came & open the door from outside so we could get out otherwise we both could be dead inside the car

Recurrent phantom braking while using autopilot. Sudden deceleration that does not seem to correlate to any specific traffic or weather condition.

When driving on a longer trip, I have repeated sudden deceleration and sometimes harsh braking when using cruise control. This has also happened in normal daytime hours with no traffic around me on rural interstates. On my last trip, I had to keep my foot on the accelerator to keep the car at a constant speed. It is unnerving to me and very scary for passengers. It has made it impossible to use cruise when I have passengers. Tesla has said there is no hardware issue and have declined to service the car.

The car had unintended acceleration. I was driving and suddenly it sped up really fast and I needed to slam on the brakes. This was on a residential street so it was really dangerous. This happened once before, on a highway. Both times this happened, I was touching the wipers controls. I have no idea if it’s connected or coincidence.

When using cruise control from Las Vegas to Reno Nevada and also going back the car will brake extremely hard over 80 times one way which almost caused alone 4 major accidents with stopping abruptly for no reason causing the cars behind you to almost rear end you. This is tremendously dangerous and it s happening so often you can even use the cruise control. This does happen on other trips as well such as Las Vegas to Phoenix. When it slams the brakes randomly all your items get thrown to the front as well. This needs fixed before someone gets killed

While driving in FSD, autosteer, traffic aware cruise control, and with all turned off, I have experienced 5-10 episodes of “phantom braking” on the highway at high speeds over the past 48 hours. I have driven in 4 states total so far; in sunny, cloudy, straight road ahead conditions, sometimes with cars around and sometimes on totally empty stretches of road. The first episode took my car from 80mph to 60mph extremely suddenly, with no warning, lurching me and the things in my car forward. I was shocked as I was unfamiliar with this issue. Luckily the car behind me at the time was about 1/8 mile away. However, this could have very easily caused someone to rear end me. This repeated over and over all day yesterday, sometimes the braking less severe than others. Now if using cruise control I need to hold my foot over the accelerator instead...

Driving from Reno to Las Vegas on hwy 95. I was using the cruise control and the car repeatedly slammed on the breaks when there was nothing on the road to cause it. Breaking was applied dropping the speed from 5 miles an hour up to 35 miles per hour. The excessive breaking could have caused a crash if a semi was behind me. Every time it happened I noticed a phantom object showing up on the very limit of the traffic display screen. If there was any other vehicle picked up by the sensors the cruise control never malfunctioned. It braked at least 10 times during the trip. I talked to 10 other Tesla drivers and 9 told me they were having the same issue. The one driver that did not never used his cruise control.

I was on a 3000 mile road trip over multiple interstates (including I-35, I-90, and I-80), and while the adaptive cruise control was engaged, the car would abruptly and aggressively brake when no other cars or obstacles were in the area. This would often be a 30mph deceleration before I could disengage cruise control and take over. This happened repeatedly, in multiple states, and in different weather conditions. At times, it was happening every 10 minutes. The system would sometimes, but not usually, make an alarm noise. This problem has become noticeably worse in later software updates. No accidents occurred because I would not use cruise control if other cars were in the area, and I eventually stopped using it altogether due to how frequently it was braking.

Vehicle suddenly braked while traveling 70mph on freeway with traffic aware cruise control engaged. This incident happened 3 times during the same 40 mile trip. No other vehicles were within 50 feet of the vehicle in either direction. A rear end collision could have happened if another vehicle were behind me. No warning sounds occurred or warning indication on the computer screen. I purchased this vehicle used from Tesla 3 days ago. Tesla service has not been notified of issue.

I get "phantom braking" on average about every 2-3 hours of highway driving with cruise control enabled. All of a sudden without any road obstructions or vehicles ahead, the car will suddenly break hard even at highway speeds. Sometimes it happens when I approach an underpass or get to a section where the pavement is darker than before.

Driving on Interstate 295 (it is unclear what the official direction North, south, west). You are going south toward Philadelphia. Some signs say north but in reality it is only for a mile or two then the road bends due south. Every time I travel on this road and just before the Scuddersfall bridge, the car brakes to 30 MPH and it does it again on the other side of the bridge (the same direction). I have reported this many times on Tesla's "bug report" and for the 2 years + nothing has been done to correct the problem. The car doesn't have a problem in the opposite direction. I usually take it off the autopilot at this location to prevent the braking.

Using Autopilot on an empty highway at appx 65mph, the auto pilot system began to brake aggressively without any obstacles in front of me. As it approached 40 or 30 mph, I pressed on the brake to cancel the autopilot before I was hit from behind. Scary.

I was on the exit lane coming from Costco on 12/31/2022 at around 12:20 PM with a speed of about 40 miles . My exit is about 100 yards away. Tesla model 3 that I’m driving suddenly accelerated at high speed and pulled towards right and hit the wall next to freeway exit lane. Then it hit the wall on rear tailgate and rolled to middle of freeway within a fraction of seconds. Two vehicles coming on the freeway hit my car and after second hit my car completely stopped in the middle of freeway. I was able to come out safely and later CHP officers came and towed the vehicle

Phantom braking: While in cruise or autopilot mode, it suddenly brakes on freeway without any obstacles observed.

Traveling on a clear, dry highway on a sunny morning and once again the next day we experienced phantom braking. This occurred three times in two days. In all cases we were traveling at 75mph and were using the adaptive cruise control. In all cases there were reflections in the road from the heat mirage or from something far down the road. The car acted as if it saw something in the road and braked sharply. The driver had to accelerate to override the braking.

While driving on an open highway using the Tesla Auto Pilot (Adaptive Cruise Control, NOT Full Self Driving), we experienced 3 separate instances of unexpected braking. In each case, we were on flat terrain with no vehicles in front of us for hundreds of yards. The weather was sunny and warm with few clouds in the sky. We were driving westbound between 10am and 1pm at the time of the incidents. During the first incident, the vehicle began to brake sharply and violently enough to startle, awake and scare a sleeping adult passenger in the front passenger seat. From memory, the braking rapidly dropped our speed by 15-20 mph. Thinking it was a simple glitch, I attempted to re-engage the system two more times and the same type of behavior occurred each time. I drove the remaining hours of our drive without engaging Auto Pilot. After researching the issue following...

Driving on cruise control (not autopilot), in the following conditions: on an interstate highway with all lanes in the traveling direction clear, no obstructions and no traffic to the front or to either side of the car, on a straight road with no bridge or on or off ramp in front of the car, daylight and no rain or or other participation, the car can unexpectedly and without warning aggressively brake. If the driver does not immediately regain control of the speed (by pressing the accelerator, or turning off the cruise control) the braking has caused the speed of the car to go from 75mph to 30mph. Unlike other Tesla accident avoidance features, the braking occurs with no indication that an obstruction is being avoided. I have owned the car since it was new and until Saturday 8 October 2022, the adaptive cruise control worked as expected. Since that Saturday...

The other driver hit the rear of my tesla model 3 which cause the car accelerate fast about 40-50 miles, the brake is not working either. I can not brake or slow down the car.

Cars computer froze and I was stuck in cruise control. Hitting the brake would not disengage. Pressing up on the stalk would not disengage. I could manually slow/accelerate the car with the brake/accelerator but after letting off the car would continue on at that speed while everything else remains frozen. No turning signal function. I was afraid to attempt to stop the car fully as it would not disengage. Screen eventually went black and reset after what felt like forever. Functions returned to normal.

The car exceeds the speed limit with adaptive cruise control/autopilot, despite all the available settings being set to strictly obey the speed limit. Driving on the highway in a 60mph zone enabling autopilot will set the speed to 60mph, as expected. If the speed limit increases, the car will change to the new speed limit, e.g. 70mph. Now, if the speed limit drops back down to 60, the car will NOT slow to 60, although the correct speed limit is displayed. Also happens on streets.

The emergency automatic brake, cruise control and auto pilot feature gets disabled frequently. All 3 features gets disabled at same time. Contacted tesla service center in decatur-GA. They are saying they cannot find the problem and hence cannot solve it. They say the engineers are looking into it, and my car needs a firmware update. No estimated time to fix these issues is given. The service center advised that the car is safe to drive! Please help. Thanks.

Vehicle was at a stop with brake engaged and then it proceeded to go full speed into a vehicle two meters away without acceleration pedal engaged. Emergency brake did not activate during or slightly before the collision. The brakes had to be engaged manually, but vehicle was already past a certain velocity on its own accord to be able to stop properly without damaging property or harming pedestrians.

My Tesla Model 3 is equipped with standard auto pilot (no full-self driving) and traffic aware cruise control (TACC or otherwise known as adaptive cruise control). While engaged, I experience, on average, per 60-mile trip a minimum of 1 phantom braking event. Note this is not on residential, county or state roads, this is on divided highways. The vehicle will slam on the brakes for no reason and will at times activate the forward collision warning system. It's so bad I've disabled many of the safety systems for fear I will cause an accident. Traffic aware cruise control on a two lane road (this does not steer or lane center the vehicle), is unusable because it constantly brakes for oncoming traffic in other lanes, or aggressively brakes for vehicles turning in front of you, even with plenty of distance to clear. The system will even continue to brake, after the...

There is a complete failure of the Autopilot (cruise control) feature and sudden braking when using. There is an extreme risk to personal safety when using this feature. On several occasions, I have been using this feature on the highway while going the posted speed limit of 65 or 70 mph. Suddenly, the vehicle will decelerate aggressively and violently causing any vehicles behind me to slam on their brakes to avoid a collision. This feature of the vehicle is not recognizing road signs, or other inanimate objects, correctly and mistakes them for some hazard that requires braking. Very dangerous.

Phantom braking can occur when vehicles are passing at night and during the day for no reason. There is no adequate control to enable the windshield wipers. Many menus to access the wiper controls. Not safe

On Tuesday 2/1/2022 approximately 9:20am EST, as I was sitting in a stop-and-go traffic, as the traffic was freeing up and started moving going roughly 5 to 10 mph, the vehicle automatically applied phantom brake - with a notification of emergency braking applied. I was not on cruse control or autopilot. i was in full control of the car yet it suddenly applied the ebrakes nearly causing someone to rear end me since the traffic had started moving.

Using either cruise control or Full Self Driving mode, driving on divided highway, experienced sudden hard braking not due to any highway obstruction, road hazard, other vehicle, or weather. Without warning car dropped out of assisted control and abruptly applied brakes. This happened yesterday at 2:10 pm, 2:53 pm and 3:01 pm.

The contact stated that while idling and waiting to pick up the elementary school kids in their vehicle, a 2020 Tesla Model 3 suddenly experienced unintended acceleration causing the driver to lose control of the vehicle and crash into the rear of the contact's vehicle and trailer. During the incident, the contact sustained a lower back injury and the driver of the Tesla Model 3 suffered a chest injury. A police report was taken at the scene. No further information was available. The failure mileage was unknown.

I WAS PARKING AT A TRADER JOE'S WHEN THE CAR SUDDENLY ACCELERATED BY ITSELF WITHOUT GIVING ME ANY CHANCE TO BREAK TO AVOID COLLIDING WITH THE CURB. MY CAR GOT SCRATCHED UNDERNEATH.

THE CONTACT OWNED A 2020 TESLA MODEL 3. THE CONTACT STATED WHILE DRIVING 25 MPH, THE VEHICLE ACCELERATED INDEPENDENTLY AND JUMPED FORWARD AND HIT ANOTHER DRIVER THAT WAS STANDING OUTSIDE IN BETWEEN THE DRIVER'S SIDE FRONT AND REAR DOOR. THE HOOD OPENED AND OBSTRUCTED HIS VIEW WHICH CAUSED HIM TO CRASH INTO ANOTHER VEHICLE. THERE WAS NO INJURIES SUSTAINED BY THE CONTACT. THE TWO OTHER DRIVERS SUSTAINED UNKNOWN INJURIES. ONE DRIVER RECEIVED MEDICAL ATTENTION AND WAS TRANSPORTED BY AMBULANCE. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO A BODY SHOP AND DEEMED TO BE A TOTAL LOSS. THE VEHICLE WAS CURRENTLY AT THE CONTACT'S PLACE OF BUSINESS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 2,500.