I use Autopilot for about 95% of my driving. I use it every day on my drive to work. It used to be perfect a few years ago but now it brakes everytime at a certain location on the highway. It is not an intersection, there is no overpass, it happens day or night, in any weather, there is not anything unusual about the road surface. The other issue is that now it brakes for emergency lights, which are cell phone towers. headlights of cars on the other side of the road, flashing lights on signs to let you know that there is an intersection ahead. If there are actual emergency lights it usually doesn't slow. I wish there was some way to turn it off. If there was just some way to go back to autopilot for 3 or 4 years ago I would do it.
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Phantom Braking getting worse - any ideas on how to stop it?
- Thread starter Ev_Rider
- Start date
If it happens day or night, in the same location, it's a map issue, perhaps in concert with a GPS issue.
There is a place on our weekly commute on a newly constructed freeway where autopilot slows from 65 mph to something slower. I think it is a remnant of a location that required slowdown before the construction was finished. It would be good if Tesla could update these places. its been over two years since this freeway has been constructed.
EVNow
Well-Known Member
I’ve a place where FSD wants to stop midway in the street. Used to have a traffic light there a few years back !
I did my first road trip with my Model Y -- only 1000 miles round trip but I figure I used FSD 95% of the time on the highway. Lucky for me my dreaded fear of phantom braking never came to fruition. I had zero phantom braking incidents and had a great experience with FSD with only a couple of minor weird things. I loved the automatic lane changes and the driving was super smooth for the most part. It exceeded my expectations and since I only make one real road trip a year I get to savor the good experience for a while.
Since Tesla has removed the "Report" button, every time I get a phantom braking/phantom slowing event, I disconnect the system. When I get the "tell us what went wrong" prompt, I just narrate it with "Phantom braking."
I'm hoping that if we can get Tesla enough clips of this happening, they can figure out why.
I'm hoping that if we can get Tesla enough clips of this happening, they can figure out why.
SalisburySam
Active Member
... or.... maybe .... add radar back in.... if the car reads speed limit signs, radar verifiably doesnt show any object or other car in front of you (and works in rain, at night, fog) ... then the car shouldn't hit the brakes because of some hearsay of a traffic light once a long time ago having been there....
SalisburySam
Active Member
Maybe, but my radar-equipped and using Model 3 still exhibits PB to an amazingly annoying degree. PB was neither caused by radar, nor fixed by TV.
I rented a model Y from Hertz for a trip in Arizona two months ago and just used traffic aware cruise. On the trip from Flagstaff to Grand Canyon Village the car would hit the brake every mile or so, daytime driving, nothing on the road, no car close. It got so bad I had to turn it off which is very annoying on a long road trip on a freeway. It would be better to just have the option for dumb cruise. Autopilot used to be good a few years back. I guess Tesla needs to dust off the version of Autopilot from 5 years ago and fire all of those engineers who spent all of that time and money to make things worse not better.
The real solution for this and also for very difficult visibility is to depend on radar instead of cameras for evaluating exact distance to an object in front of you.
And ultrasonic sensors low on the the car are the only accurate way to see and avoid posts, parking space concrete blocks, and obstacles in a parking garage.
I am a retired very senior electronic engineer. I have told sales managers, service center managers and technical support that the radar modules and also the ultrasonic sensors should be restored and operational in all of the new vehicles. My previous car was a 2015 model S. Summons and parking assist worked perfectly. Avoidance of obstacles in a carport or a tight garage were never a problem. The autopilot never ever had a phantom braking issue as it did not have machine vision to determine whether there was a car or person a long way off in either very foggy weather or in mirage weather.
All Tesla employees told me that Tesla Corp refuses to reinstall and enable these. We need all customers to pressure them.
And ultrasonic sensors low on the the car are the only accurate way to see and avoid posts, parking space concrete blocks, and obstacles in a parking garage.
I am a retired very senior electronic engineer. I have told sales managers, service center managers and technical support that the radar modules and also the ultrasonic sensors should be restored and operational in all of the new vehicles. My previous car was a 2015 model S. Summons and parking assist worked perfectly. Avoidance of obstacles in a carport or a tight garage were never a problem. The autopilot never ever had a phantom braking issue as it did not have machine vision to determine whether there was a car or person a long way off in either very foggy weather or in mirage weather.
All Tesla employees told me that Tesla Corp refuses to reinstall and enable these. We need all customers to pressure them.
I have experienced that defect MANY times. It is quite annoying to be slowed down to a crawl when the traffic is moving well. I told Tesla and they said to shut off autopilot and wait for another update. But none of the updates have fixed this.
Tam
Well-Known Member
Some believe the fix is in 4-D imaging radar (not the cheap kinds of Tesla radars):
Countering the ‘Phantom Braking’ Phenomenon
4D imaging radar, with its ultra-high resolution and advanced post-processing, reduces false alarms and detects nearly no phantom objects.
www.wardsauto.com
Waymo, MobilEye... have been using 4-D imaging radars.
I agree and I’ve said this on every survey from Tesla. I’ve also said that I will not be recommending a Tesla to anyone until it’s fixed. My dad’s 1979 Oldsmobile Toronado did cruise control better than my brand-new MYLR.
Just had my 1st PB experience in my 2023 MYLR. Was driving at about 70 mph on a hwy with the fast lane blocked for construction with cones. I was in the #2 lane and had been in it for about a mile or two when the PB happened. My thought was the car confused the cones but they were not in my lane and it was pretty sudden. I have had issues with autosteer and now with cruise control, will probably not use those features again which is too bad.
Teetoogrn
Member
I don’t use FSD when there are cones in the next lane for that reason. I worry that a cone will be out of place or the car will do what yours did. Someone above mentioned that the older cars with radar didn’t have PB as bad. They should put the radar back.
Please remember that this is a Level 2 driver assist feature. Use it for boring driving tasks. When near construction, cones, police traffic control, etc, disenge and drive manually. Once your back into boring driving tasks, reengage.
You can’t turn TACC off and only get “dumb” cruise control with Tesla…. Unfortunately
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