Adaptive Cruise Control problems of the 2021 Tesla Model 3 - part 2

My 2021 Tesla Model 3 is having more occurrences of phantom braking than ever before when I drive with the Tesla autopilot/full self driving system activated. I paid extra for full self drive (fsd) and engage it mostly on highway driving. A recent software update from Tesla pops up a message on my screen any time I dis-engage the fsd asking me "what happened?" and offers me the chance to record a 10-second voice message regarding why I turned off the fsd. Yesterday, on 07/31/2023 between 12pm pst and 2pm pst I must have made at least five such recordings, each time for phantom braking suddenly jerking my car slower while I drove on major highways. In each case I was on a 55 mph highway (or faster). In all the cases, my lane was wide open with no cars even remotely close to me. Sometimes there was oncoming traffic in the approaching lane of traffic, but not always. It certainly should not be braking due to oncoming cars in their correct lane. Yet the car slowed down suddenly over and over again. This is a repeated problem, but I haven't had so many instances in one long drive. Yesterday I got fed up and resorted to driving without autopilot for a large portion of my 150 mile trip home. Sudden braking - for no reason - substantially increases the risk of getting rear-ended by the car behind and frankly causes near-panic with people in the car itself.

“phantom braking”. Driving on the interstate approximately 75 mph using cruise control, auto steer, not auto pilot. Within a span of three hours today we experienced at least six episodes of the car emergency braking for apparently no reason. Immediately going from 75 to 40 mph. Thankfully no one was close behind us. We finally stopped using the cruise control. Now afraid to use it at all.

Just completed a 2week trip and the car attempted to stop on its own over 37 times (stopped counting) on the highway. 2times I had a semi within a block of my rear of the car. Since this occurrence is not anticipated it worries me that it's going to cause an accident. Reported to Tesla and it's days the feature is beta, I don't believe that for a second . This my 3td car with adaptive cruise control. I was not using the auto guidence feature.

Electrical system rebooted in the middle of driving: screen went off couldn't signal I swayed to the side and waited till the screen came back on after 3 minutes.

Constant phantom breaking.

When vehicle is in cruise control or autopilot the car will suddenly brake without warning. It will do this numerous times and could cause an accident if a vehicle is following close behind.

Ul_a022_apefusesetc audience [service-fix, factory) description driver assistance ecu (ape) is not fused or not locked or missing credentials set condition driver assistance ecu is not fused or not locked or missing credentials clear condition driver assistance ecu is fused, locked and has proper credentials potential impact driver assistance ecu is in an unsecured state (unfused).

When driving the Tesla Model 3 in cruise control, it will without warning apply the brakes. I have to then accelerate and then take it out of cruise control. The issue has happened about a dozen times and only happens while in cruise control. It happened most recently today but has happened in previous days.

The incident first happend (and has been happening ever since) on I-8, I-10, I-20 east bound 2 days ago. Driving on eb I-8 with speed limits 75mph, engaged Tesla's well touted onboard enhanced auto pilot (eap) with auto steer control. There was no one ahead of us for over a mile. The weather was clear and sunny, time of incident around noon. Max speed was set to 75 on eap. All of a sudden, we felt a jerky motion, and realized the eap has activated brakes, dropping speed from set 75 to about 50mph. No visual or audible alarms, the eap did not disengage. The driver took over to speed up to avoid being rear ended by vehicles coming behind us. It happened several times more during our trip and then we decided to manually drive. We have video documentation available.

On may 22, 2023 driving south on I-580 through reno with the Tesla adaptive cruise control, there's a 55mph construction zone. As a result, I use the right scroll wheel to adjust the speed from 65 to 55mph. The scroll wheel didn't work. As a result, I turned off the cruise control with the right steering wheel stalk. At the same time, I noticed the vehicle speed indicator on the upper left of the crt display was malfunctioning; both failing to respond to changes in the car's speed, and then indicating erroneous speeds (at one point indicating 34mph when I was going around 60mph. These issues continued. I took the exit on double r blvd to turn right. As I got into the right lane on the freeway to exit I attempted to turn off the cruise control and it didn't work. Approaching the exit, I then applied the brake. The regenerative braking function did not apply. As a result, it felt like the cruise control didn't turn off. However, I braked to a stop at the intersection in the right lane with no issues. When the traffic cleared, I attempted to turn right and proceed east on double r blvd. The car didn't move. Using the right stalk, I tried shifting into drive, reverse, and back. All this time, the drive (d) and reverse (r) indications on the crt did not show. I let off the brake and the car inched forward. I turned right immediately into the maverick gas station entrance to get off rr. The crt display now showed the back-up camera displays (a normal indication of the car being in reverse). I cautiously let off the brake and applied the accelerator pedal to see if I backed up, but the car was in drive and proceeded normally. I continued to drive and the crt screen went completely black. I soon realized the car's computer was rebooting with the faint Tesla logo on the black screen. Within a mile or so, everything came back on the screen and worked normally. I then reached my destination. When I returned to the car, it was as if nothing had happened.

Was using cruise control on a road trip, traveling through arizona and the car jolted to stop three different times without advance notice or anything in the road. It was like slamming on the brakes. I was afraid to use it anymore, so now it’s like having a vehicle without cruise control feature. There were cars all around. We are fortunate no one hit us. This needs to be addressed. Googled and discovered it is called “phantom braking. ” hoping this serious safety issue will be fixed and no one gets hurt or dies because of it. Thank you.

Using cruise control or auto pilot and then the car randomly brakes.

Intro: this is a well known problem with Tesla cars. It's referred to as "phantom braking" in the facebook Tesla groups and is wide spread. Using only cameras since around 2021 for adaptive cruise control, the car will "slam on the brakes" even though the road is completely clear ahead. This can easily cause an accident if there is a car following you. It has occurred several times since I bought the car Jan 2022. - malfunction component adaptive cruise control. Yes available for inspection - a rear end collision could occur when the car's brakes are activated so hard that the car decelerates from 70 to 20 in seconds - the problem is well documented - no, no inspection by any entity. Tesla knows the problems exists - no, no warning of any kind.

While using the autopilot or cruise control feature the vehicle slams on the brakes without driver intervention. I found this appears to be a common problem called “ phantom braking” I opened ticket with the local Tesla facility but they required an accurate time storm of the incident to be able to troubleshoot the issue. This is a major safety issue and I request it be investigated as soon as possible. I read some news reports that Tesla phantom braking has caused major accidents and I don’t want to be in one.

There were 2 phantom braking incidents today traveling between pasadena and berkeley onhighway 5. It was getting cloudy. The first incident occurred just after I passed under an overpass, and thought it might have been due to the lighting. The braking was mild . There were other cars passing me on the left. I had the cruise control set to around 74mph. I probably slowed to 65mph the second phantom braking incident was about an hour later, and it was hard. Fortunately the cars behind me were far enough away. The cruise control was also set around 74mph. Interestingly, no audio alerts were issued with either incident. Normally, when driving without cruise control, the car will issue audio alerts (loud, urgent beeping) if a car gets too close. In both of my cases, there were no cars in front of me as I was in the slow lane.

When driving on the highway on autopilot (not full self driving or enhanced auto pilot), the vehicle will experience “phantom braking” where it will suddenly brake with full regenerative braking force without any perceivable reason/cause. I have noticed this event occurs every time at the same location as it is on my commute to work. I’ll be on the highway with my speed set to around the speed limit of 65mph in autopilot mode, and when approaching the merge of a specific on-ramp, the car’s set speed will suddenly change from 65 to 55 and then the full power of regenerative braking is applied until I manually disengage them. There can be no vehicles around me or any logical reason for it to brake, and it will do so anyways. This is a safety concern as a vehicle following behind me may not anticipate a random and hard braking event for no apparent reason or cause to do so. The car acts if the speed limit decreases, which it doesn’t, and then its reaction is to brake very very hard and abruptly. If I don’t manually disengage the brakes, I’m not sure if it would come to a complete stop on the highway or just brake until a certain speed is reached. This phantom braking event has occurred in other areas as well, but I have noticed it always happens at this one specific location every day. There are no speed limit signs/changes in the area.

My Model 3 on crusing speeds on high ways, automatically applies brakes and makes sudden,abrupt, jolted slowing down which causes extreme pressure on persons body.

The car suddenly braked hard when there were no obstacles or other reason. If someone was behind me I would have been hit.

Car put on brakes unexpectedly during use of adaptive cruise control (autopilot). This phantom braking happens often at highway speed. Bug reports have been sent from vehicle to Tesla.

I was driving Tesla on the freeway using adaptive cruise control at 65 miles per hour and the car suddenly brake and the sped jumped from 65 to 20 in seconds. It was scary. There was no one in front of nothing in the road to cause that to happen. It did say on the screen something about visibility. I had to take control of the car after. It has happened several times before. When I spoke with Tesla they said it’s a safety feature and it only happens when you pass certain cities. I find that hardly true.

Tesla software release 2022. 44. 25 my Tesla autopilot continues to exhibit phantom braking while in traffic aware cruise control and autopilot. The vehicle will suddenly slow down either gently or harshly. This behavior was observed after Tesla released software that disabled the cars radar. Since then, multiple updates have remedied the issue but 2022. 44. 25 has introduced phantom braking again. No accidents have occurred but luckily I live in a remote area of arizona and can take control of the car as it phantom brakes. After Tesla working in autopilot for years, I think it’s time for additional validation to start happening on autopilot and traffic aware cruise control. I’m also of the belief that normal cruise control should be banned. Thanks!.

The only cruise control feature available on this car is the adaptive cruise control. This car continues to make sudden unsafe braking maneuvers for no reason. It seems to get confused by steep hills, bridges, shadows, and other factors. You can be on a highway going 70mph and it will slam the brakes, terrifying passengers and potentially causing you to get rear ended. This has been ongoing since the purchase of the car 1 year ago.

On multiple occasions, the car will suddenly decelerate while using adaptive cruise control on the highway. Malfunctioning component: adaptive cruise control. Safety: rear end collision if another vehicle was following too closely. Manufacturer is fully aware of the problem.

On certain sections of highway unsuccessfully attempted to activate auto-steer (two down clicks) multiple times in a row. Did this multiple times in a row but was unsuccessful to activate auto-steer. Instead a supposed "easter egg" (which activates with 4 down clicks) very loudly plays loud jarring music (called "rainbow road"). . . This is not fucking funny--I nearly ran my car off the road and into oncoming traffic. Giant 2000 pound hunks of metal going at 60 mph should not fucking come with special surprises. This is incredibly dangerous and jarring to drivers.

Driving south on the 5 freeway right northing on oceanside the vehicle shut down at freeway speed. I had to coast of the to the first oceanside. Fortunately it was late at night and there were no cars in the immediate vicinity. In addition to this the vehicle has had multiple episode of phantom breaking. I do not feel safe driving the car.

I was going 80mph on the interstate coming back from little rock to tulsa. The time was 4am in the morning with little or no traffic on the road. I was using only the cruise control with adaption turned on. The car all of a sudden without any warning almost came to a complete stop on the interstate. I later asked what caused this and was told it is phatom braking but this was very dangerous, if someone had been behind me they probably would have been messed up. I merely accelerated to make sure I was at least keeping the minimum speed limit. Please advise. Shawn.

While using the base level of "autopilot," remaining in a lane and maintaining speed, the car will randomly slam on the brakes even when there are no vehicles or objects in front of it. The first incident occurred while driving late at night on an interstate. There were no vehicles in front of the car, but it rapidly reduced speed from 75mph to 30mph, before immediately speeding up again. The camera based "autopilot" is essentially useless and I have decided not to use it when driving.

Adding our vehicle to the list of those affected by what seems to be commonly known as "phantom braking". The most recent occurrence was on interstate 25 southbound in northern colorado when the "autopilot" (adaptive cruise control) suddenly braked and reduced our speed from 75 to 51 mph, with no vehicles or other obstructions visible. We were almost rear-ended by a car following us, however. I want to point out that this was only the worst example of several episodes that occurred that day, and on earlier dates as well. We no longer use autopilot, which makes long trips much less comfortable. I also want to mention that our vehicle does not have Tesla's "full self driving" (fsd) installed, so my hands were on the wheel at all times.

While using cruise control on a cross country drive, there have been numerous instances of phantom braking in my Tesla Model 3 sr+ (2021). This has been occurring during both day and night driving on the highway, at speeds of 65-75mph. It appears to happen most frequently when there’s a slight up-hill on the highway followed by a slight downhill and then phantom brake, but there have been instances on flat highway road at night with phantom braking taking place.

Trip from piedmont, California to salt lake city, utah, I experienced three (x3) phantom breaking incidents at over 80 mph on interstate 1-80. The car without warning dramatically DE-accelerated from approximately 85mph to 65mph or 60mph without warning and suddenly. Dog was riding in back and thrown into front dashboard on one occasion. Visited Tesla dealership on state st in salt lake city utah upon destination arrival and manager/head at front desk laughed indicents off saying, "we've heard of such incidents just wait for the software update. " horrible. Beyond dangerous. I can report that in all three incidents there were no cars in front or behind me and the phenonenon occurred totally unexpectedly. Reported it also to Tesla repair shop in berkeley, California, and intake group had zero sympathy and said, "it's a known software glitch. ".

I have had the car for about 1. 5 years. In the last week it has started to have phantom braking where on a clear, flat road with no traffic, it suddenly has hard braking and slows from about 65 mph down to 40-50 mph. This has occurred when operating on autopilot with the cruise control and autosteer on. There is a risk of a rear collision with this sudden braking. There was no warning. I do not have full self driving.

Model 3 sudden max speed reduction (60/55 to 25/30) when using autopilot. This happens every time and in multiple areas when driving on I-4 through orlando, FL.

The Tesla uses “auto high beam” when in autopilot. The pros of this can allow drivers to utilize the light so the cameras can detect anything to avoid any possible wrecks, but it does not have an option to be turned off. Along with other people online, my brights have flashed at people on the interstate and highways or haven’t turned off at all. This is irritating and limits the way I am comfortable with using autopilot. Please inform Tesla to make the auto high beam feature optional.

I was on a road trip on rural highways in texas and new mexico. The adaptive cruise control/autopilot system repeatedly hit the brakes when driving at highway speeds for no apparent reason. This would happen even though there were no cars in front of me or other obstructions in the roadway. If there had been another car behind me there would have been risk of a rear end collision because the car would unexpectedly significantly reduce speed. A few times when this happened, the car made warning sounds, but most of the time it would not provide any warning at all. I have tried making a service request with the manufacturer, but they claim that there are no hardware problems with the car and I have to wait for a firmware update.

During a road trip from oklahoma to California and back my Model 3 suddenly and abruptly braked coming almost to a stop on up highway while cruise control was engaged. The braking was such that it caused occupants to lunge forward and seatbelts pretension. This aggressive braking is a common occurrence with Tesla and has been called “phantom braking”. This is not the first time this has happened to me. This is a recurring issue.