Adaptive Cruise Control problems of the 2020 Tesla Model Y - part 2

With car in cruise control on freeway, sudden and hard application of brakes by vehicle, no human input.

Vehicle routinely forcefully applies the brakes for no apparent or warranted reason causing vehicles behind to take evasive maneuvers to avoid striking our vehicle. The vehicle on several occasions has also unexpectedly veered out of our lane into another lane, into oncoming traffic or off the road.

When cruise control is on, the vehicle suddenly brakes. I only put cruise control on the freeway and it has happened 4-5 times over the course of last year, as recently as 2 weeks ago. I had to take over operation of the throttle and removed cruise control to make sure it wasn't going to cause any issue in traffic.

I have noticed when using adaptive cruise control on my Tesla Model Y that it did phantom braking on me. It has only happened to me about 5 to 6 times and it scared the heck out of me. . Don’t know if I was getting close to a semi truck and it pulled that phantom braking, but there was a time it just did it on its own when there were no cars around. Autopilot I have no issue. Hope Tesla comes up with a software fix soon to resolve this issue as I love my Tesla and its a great car to drive. .

Driving in auto pilot mode in the three lane highway between whitestown lebanon . I was going in the middle lane on autopilot . In the far right lane one truck is merging into the right most lane. So truck is in the right lane and we are in the middle lane , but auto pilot assumed that we are going to crash and it tried to jump to the left lane and the vehicle automatically wobbled for few seconds and then it became stable in the middle lane. Had there been a car in the left lane it would have been a fatal accident. If they said that it’s an assisted driving rather than auto pilot I would be more cautious. I bought this car due to the promise of autopilot thinking it’s safer it has put my life in risk which could have lead fatal accidents today. Please refrain Tesla from using the it asthe autopilot and putting peoples life’s at risk. Please do take necessary actions to prevent this for any fellow drivers.

My Tesla was in auto pilot, not full self drive. I was merging into traffic on an interstate, in the acceleration lane. Even though the car was in auto drive, I stepped on the accelerator to merge a little faster. The car stopped dead. It coasted to a complete stop responded to no controls. It had to come to a complete stop in traffic traveling at 65 miles an hour before I could get it to start again. Luckily, I was being followed by my husband because I was taking the car to the auto repair for bodywork. He was able to stop behind me and luckily, neither of us were hit.

Unexpected activate brakes while in autopilot. Rapid deceleration can occur without warning, at random, and often repeatedly in a single drive cycle .

The Model Y will randomly brake while at freeway speeds. I've seen it go from 80 mph down to 60 mph before I could react. In one instance a semi-truck had to swerve into the left lane to avoid hitting us. The problem has persisted for months and, when reported to Tesla, they denied that it had happened.

Operating the vehicle at highway speed of 70 miles per hour on interstate 80 in illinois. No visible traffic going in either direction for approximately 1/2 mile in all directions when the automatic braking happened for no apparent reason. Scared my wife and myself (both 74 years old) to death. Threw us both forward. My wife now refuses to drive in this Tesla and wants me to sell it. "phantom braking" is not an acceptable phenomenon. If there was a tailgating semi behind us we would both be dead today before people die. This must be fixed!!!.

While using adaptive cruise control, the car decelerates for no apparent reason. The rapid deceleration of the vehicle could cause the following car to rear end my car. There is no warning when this occurs. I have not reported it to the manufacturer because forums and news show that all owners are impacted. This has happened many times.

I was driving east on I 90 not long after the bonner exit east of missoula, montana. Due to various issues with road conditions I had been using Tesla's autopilot rather sparingly. After missoula the roads were clear, bright sunny day around 1 pm, there was no traffic close by. I had ap engaged at this point. For no obvious reason I got the bright red steering wheel take control immediately warning and chime. . . At which point, rather startled, I took control and after a minute or two re-engaged ap. Not long after that road conditions deteriorated and I drove most of the way back to butte.

While traveling on rt 27 south in florida on a bright sunny day with no traffic around the car and on adaptive cruise control my Tesla Model Y "phantom" braked twice within a mile or two of these incidents. This has happened several times before while on full self driving mode but the first while on cruise control.

This has happened multiple times over the 1. 5 years that I have owned the vehicle, but it happened twice again today. The issue I am having with the vehicle is with phantom breaking. When "autopilot" is engaged, and the vehicle is travelling along a fairly straight path, occasionally it with brake suddenly for no apparent reason. This can have no real affect, or like today, when driving in heavy traffic this can be the catalyst for an accident or at the very least road rage (as the person behind thinks you are brake checking them). As stated, I've had the car for 1. 5 years and this has happened more than 15 times, and I drive the vehicle very little and use autopilot even less. In my opinion this feature is not quite ready for daily use and should either be corrected or removed.

While using the Tesla auto pilot in highway conditions the car would suddenly break or slow down as if the car was trying to avoid another car. There were no other cars in the area. This has happened several times but only in auto pilot.

While using the autopilot the car will suddenly slow itself even though there is nothing in front of the car. It happens most often when approaching a large vehicle or truck that is in the lane next to the car. It seems as though the autopilot system is spooked by the truck even though it is staying in its lane. Similarly, there are 2 spots on I-25 in colorado where the sudden braking happens regardless of what is around the car. It may to do with recent construction because in both places the car slows suddenly at the same point nearly every time I pass through. It was happening at one of these spots after the construction had moved the lanes. The lanes were marked very well and the car had no problem before or after this point. But when passing through the car suddenly slows. The danger is that a car driving behind me would not expect the car to slow down for no reason. A potential rear-end collision danger. Happy to give more detail to add context.

I was driving south on I-75 about 10am on January 16, 2022. Traffics was moderated as I was driving in the left lane about 60 mph following another car. It had suddenly started snowing rather hard and the road was wet as it had been for the previous 50 miles. I felt no change in the road or car handling. Another dark SUV started passing me on the left. That seemed normal until the dark car was about 3/4 of the way passed me. Suddenly my Tesla swung to the left and came in contact with the right rear panel of the SUV. I tried to correct my car but it suddenly went out of control to the left. My car suddenly was out of my control and skidded side ways with the right side of the car coming in contract with the guard rail in the center. It happened so fast I could not react as the car took out about 20-30 feet of metal guard rail. It spun around and ended in the center ditch facing the opposite direction. Air bag on the right side deployed and I was in contact with the center front seat. Car was badly damaged with the damage protion mostly the right side of the car. Police came about 30 minutes later. At first I told him I was uninjured but after about 10 minutes my right leg started hurning and I requested an ambulance with took me to the hospital in corwin ky. That leg swelled up and x-rays and mri were taken. Please talk a look at the vided on youtube under Teslacam. . . There is a video of the same thing happening to a Tesla driver on a highway in southern California. I do not know if this is related to the sudden breaking problem with Teslas. I have been driving for over 50 years and this is my first serious accient.

It's called phantom braking and it's absolutely dangerous. It happens when on auto pilot.

On open freeway, I 76 between 7 am and 8 am Tuesday November 16, between ogdallala ne and brush CO. Using adaptive cruise control with autopilot steering (as well as without autosteer), multiple episodes of severe "phantom breaking" where the car slams on the breaks for no apparent reason. No other cars around. Flat, clear open freeway. Reported the issue to Tesla service. Even though there were multiple (>10 episodes in one hour) they have demanded to know the exact time stamp. I was able to give time within 1 hour period, vehicle location. Service says if there is a hardware issue they will look at it. If it is "firmware" it will need to wait for a firm ware update. This is dangerous. What if the car slams on the breaks at 80mph, with someone following close behind? you might be rearended. Really serious safety issue. My car has latest fsd beta 10. 4. This is much worse than before this "upgrade".

The contact owns a 2020 Tesla Model Y. The contact stated that while driving at an undisclosed speed with the cruise control set at a designated speed, the cruise control feature would malfunction and reset the speed to 20 mph slower than desired. The contact stated that no warning lights were illuminated whenever the vehicle would suddenly decelerate. The vehicle was not diagnosed or repaired. Neither the dealer nor the manufacturer had been notified of the failure. The approximate failure mileage was 20,000.

We experienced multiple (4-5) "phantom" braking events while driving cross-country using adaptive cruise control & lane keeping assistance on open interstate highways during the summer of 2021. There were no vehicles or other obstacles in our driving lane ahead. Sometimes it seemed like it happened when we approached a shady underpass. Other times we couldn't see anything that might have confused the adaptive cruise control. We did not have full autopilot engaged during any of these times, only adaptive cruise control and lane keeping assistance.

I was driving in a "train" of vehicles at about 65 mph using "autopilot" when my Tesla Model Y slammed on the brakes when the paving changed color. I was almost rear-ended by the unsuspecting car behind me. Emergency braking without a valid reason, or even an observable reason, has occurred several times since we took delivery of then car two years ago, but not as severely. I am reporting this 2021 incident now due to the recent publicity. I urge the NHTSA to clamp down on beta testing of vehicle automation by unsuspecting new owners. Vehicle automated driving on public streets is a threat to public safety.

• cruise control braked hard unexpectedly and for no reason. I'm describing a specific instance here, but this happens regularly. Specifically, the traffic aware system frequently misinterprets the data it is collecting. In this case, a car in an exit lane, slowing down to take a ramp. I was not in that lane, but there was no painted line between my lane and the exit lane. My car slowed to match the speed of the car on the exit ramp. In other cases, my car has slowed drastically when a car in a slower lane slightly veered into my lane by only a couple inches. There has been no risk of a collision when this happens, but my car suddenly braking then causes a new risk of collision for the cars behind me. • car rapidly decelerated from 70mph to 35 mph while there was another car behind me. He was caught off guard and had to manually brake hard himself to avoid hitting me • there are numerous independent confirmations of this behavior online, but I do not specifically know of any from an official "independent service center. " Tesla denies the existence of the behavior. • there is no real "component" to inspect, this is a software issue • there were no warnings or other indications before it happened.

The other day I was stopped at a red light, awaiting green in a left turn only lane. It was a long light and I may have been distracted by a conversation with my passenger. I am 99% certain that I did not have my foot on the brake pedal because I rarely use it now-a-days with regenerative braking and tacc. The green light chimed and I instinctively pushed upward on the right stalk, double checking (in my mind) that I had disabled tacc and autopilot, knowing that I was about to turn left. Unfortunately this 'conditioned' behavior of mine inadvertently put the car in reverse!! I pressed the accelerator and nearly backed into the car behind me. It completely caught me off guard since my expectation was that the car would move forward. Obviously I was wrong. The driver behind me was disturbed, however I did avoid making contact by hitting the brake pedal. While I certainly realize that I am fully responsible for the confusion, I do believe that Tesla safety engineers might want to explore this scenario and seek out a preventive safe-guard. Perhaps software can prevent car from switching to reverse unless the brake pedal is depressed. Or maybe a much larger "r" indicator that blinks and beeps. I'm sure it is an easy fix.

The contact owns a 2020 Tesla Model Y. The contact stated while driving at various speeds with the adaptive cruise control activated the vehicle would erroneously reduce speed. The failure occurred on multiple occasions. On another occasion while driving 70 mph, the vehicle abruptly decelerated to 50 mph. The cause of the failure was not determined. The manufacturer and local dealer were not notified of the failure. The approximate failure mileage was 3,000.

Autopilot/cruise control disengage function should not be on activated by selecting up/reverse on the gear selector. Car inadvertently went into r reverse when disengage was commanded. Narrative: car was on interstate at highway speed with navigate on autopilot and adaptive cruise control on. An accident occurred on the expressway and the state police began to shut down the road. The car successfully and safely automatically stopped behind traffic in front. Police began directing stopped traffic to move off roadway. I selected "up" or disengage on the gear selector and the car instead went into reverse. I stepped on accelerator and car moved backwards without warning. Disengage autopilot/adas needs to be a separate function and different control motion from selecting r reverse like on model 3. Very dangerous.

~3 times the car slowed down at ~65mph while on cruise control. Thank goodness no one was closely following us!!! dangerous!!! the car lane assist feature which should warn when us when we're veering to closely to another lane or the edge of the freeway only works intermittently.

My car is a 2020 Model Y, delivered on June 27, 2020. This fall, I've had an issue crop up that looks like it's been addressed in the past (at least for models s, x and 3 before March 31, 2019). The problem is that on several occasions (specifically on 11/26/20) while driving on city streets and with humid and cool weather (here in iowa) I've had a report on my display indicating that the b pillar camera is obscured. This, of course, would disable auto drive (including auto lane change) but I'm also concerned that this blind spot may mean that lane change protection during traffic aware cruise control (I. E. * auto drive) will not work, or not be very effective, either. The only formal reference I can locate for this problem is service bulletin sb-20-12-002 but the remedy proposed there has apparently been implemented on all production vehicles starting on March 31, 2019. Well, that solution for this design defect clearly does not work. On November 26, 2020 (the date of the first occurrence of this issue on my Model Y), I requested a service appointment. This was based on the seriousness of the problem given the display warning I received which requested that I stop the vehicle and clear the obscuration immediately. Upon stopping, a glance at the b pillar camera location showed that the issue was one of condensation on the inside of the protective glass over the camera (see attached). From online forums, it's clear that I'm far from alone in having this issue. My service appointment date was originally set for December 17, 2020 but has been canceled as of today. The service center handling my requests is saying that this is "normal" operation of the vehicle and, while the camera may be operating as designed, I disagree that it should be working this way since it removes blind spot awareness from the vehicle's software system and the occurrence is random.

The traffic aware cruise control will suddenly and inexplicably agressively slow down or even slam on the brakes for no reason. If someone were following me close on the freeway, I would be rear ended. This behavior has been happening to me for almost 3 years now and has not improved, even though it is controlled and upgradeable via software. This is a known and far reaching problem that lots of Tesla drivers have experienced and have named "phantom braking". I have video of some of my incidents as well as canbus data, showing how aggressive it can be in slowing a car down, for no reason. Unfortunately, many Tesla owners now refuse to use tacc or autopilot since we feel it is too dangerous to use when other vehicles are nearby. I've opened support tickets with Tesla in the past for this, but they claim that there is no problem, and others have heard the same thing as well. Please look into this major safety issue with Tesla's so that we can feel safe fully using our vehicles again. Tesla likes to say that their autopilot feature is safer than a human, but clearly this is not the case when it has such a major software fixable bug as this. Thanks for listening and I hope that you can both see what a safety issue this is and help persuade Tesla to fix it, for the safety of us and every other driver around us.

When using the autonomous driving mode, the car unexpectedly decelerates with no warning and with no obvious traffic or other issue triggering the behavior. This has happened several times in dry, light conditions with no surrounding traffic. After experiencing this I have not used the autonomous mode again as it's completely unsafe.

The contact owns a 2020 Tesla Model Y. The contact stated that while using the cruise control feature the vehicle would inadvertently slow down drastically with no warning. The contact stated that the dealer was made aware of the failure however, the failure cause was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 700.