Adaptive Cruise Control problems of the 2020 Tesla Model X

I own a 2020 Tesla Model X equipped with hw3 and full self-driving (fsd). After a Tesla software/fsd update earlier in 2026, the vehicle began experiencing a recurring problem during fsd operation. The issue has now occurred more than 20 times. During certain fsd-controlled maneuvers, particularly when turning from a complete stop onto a higher-speed road, fsd commands unusually aggressive acceleration. During the acceleration, fsd abruptly aborts/disengages and the vehicle logs diagnostic fault code di_w124. Cruise control and fsd then become unavailable. There is one particular location where the condition is highly reproducible. Fsd turns from a stop onto a road with a 50 mph speed limit, rapidly accelerates the vehicle, then triggers di_w124 and aborts. Tesla previously inspected the vehicle for this issue and advised that the vehicle hardware checked out normally. The problem has nevertheless continued through subsequent Tesla software updates. After another recent software update, I tested the same maneuver again on [xxx], and the same di_w124/fsd abort occurred. The problem did not occur prior to the earlier software/fsd update and appears to be associated with fsd-controlled acceleration rather than a general vehicle hardware failure. I am concerned that a driver-assistance system commanding aggressive acceleration and then unexpectedly disabling itself during the maneuver presents a potential safety risk, particularly when entering a 50 mph roadway or merging into traffic. Tesla has previously inspected the hardware but the condition remains unresolved. I am reporting this so NHTSA can determine whether other 2019–2020 Tesla model s/x hw3 vehicles are experiencing the same di_w124 fault during fsd-controlled acceleration. Here is a link to the video that was taken a few months ago. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

While driving my Tesla Model X on the interstate at highway speed, the vehicle began intermittently displaying false warnings that the trunk was open. This occurred multiple times during the drive and appears to have been caused by a malfunctioning trunk latch sensor. At the time, I was using autosteer, part of Tesla’s autopilot driver-assistance system. Each time the false trunk-open condition occurred, autosteer immediately and unexpectedly disengaged. Under normal circumstances, when autosteer disengages while I am driving, the vehicle provides an audible alert and a visual warning instructing the driver to take control immediately. During these incidents, neither warning occurred. There was no audible alert and no visual notification informing me that autosteer had disengaged or that I needed to immediately resume steering. The system simply stopped providing automatic steering assistance. Because there was no warning that autosteer had disengaged, I did not immediately realize that the vehicle was no longer maintaining its lane. The vehicle drifted into the adjacent lane before I recognized what had happened and regained control. Fortunately, there was no vehicle in the adjacent lane. Had another vehicle been present, this could have resulted in a collision. This occurred multiple times during the drive. The false trunk-open warning repeatedly caused autosteer to disengage without the normal audible or visual disengagement warnings. My primary safety concern is not simply the malfunctioning trunk latch sensor. The safety concern is that a failure of an unrelated trunk latch sensor can cause autosteer to suddenly disengage at highway speed without providing the driver with an audible or visual warning that automatic steering assistance has been lost. In my case, this failure mode resulted in an unintended lane departure. A relatively minor sensor malfunction should not be capable of causing an unannounced loss of automatic steering assistance.

On 1/12/24 at 12:55pm my 2020 Tesla Model X long range plus suddenly started braking while on the highway. I was driving 75mph to san diego from arizona. There was no vehicles around or in front while using the cruise control. This also has been an issue with our 2023 Tesla model y and previous model 3 while driving to las vegas at 70mph. I really think this is safety concern. Luckily there was vehicles behind us with all incidents that took place. I recently took the 2020 Tesla Model X on 1/19/24 for the issue and the technician found no issues while driving it.

Many hard braking incidents ignores posted speed limits been close to being rear ended by following cars.

I have driven this vehicle approximately 28,000 miles. I am the original (and only) owner. When using the cruise control the car will break suddenly and aggressively for no apparent reason on the open road. This has happened more than a dozen times. I cannot say what percentage of my driving is done with adaptive cruise control functioning but I would suspect well less than 30% of the 28k miles. On several occasions I surmise it my be related to oncoming vehicles in their normal lane. Fortunately, these episodes have not resulted in any collisions to date.

Repeatedly, I have had my car brake harshly when travelling anywhere from 30-55 mph while using adaptive cruise control. There is nevere anything in the road or a car anywhere nearby to warrant a dramatic braking. The decelertion is harsh and alomst caused someone behind me to hit me on 2 occasions. I have repeatedly told Tesla about this and mostly gotten a nebulous response about "hardware" or 'software" issues and that they are working on it. This is dangerous and hurts when it unexpectedly happens!!.

Sudden acceleration.

Recurring phantom braking every drive.

When I'm using the driving assistance on the highway, and I'm doing like 60 or 70 mph, all of a sudden the car brakes to 45mph if it (falsely) thinks we are in a construction zone I believe. I have almost gotten in 3 accidents because the car suddenly brakes hard on its own, without me braking.

The contact owns a 2020 Tesla Model X. The contact stated that while driving at various speeds with the cruise control or autopilot functions activated, the brakes inadvertently engaged, causing the vehicle to come to an abrupt stop. The vehicle experienced phantom braking. The contact stated that after the full self-driving beta program was installed, the failure occurred. The vehicle was taken to the dealer. The dealer transferred the contact to the tech department. The tech department informed the contact that they would repair the failure with an over-the-air software update. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 46,000. The contact owns a 2020 Tesla Model X. The contact stated that while driving at various speeds with the cruise control or autopilot functions activated, the brakes inadvertently engaged, causing the vehicle to come to an abrupt stop. The vehicle experienced phantom braking. The contact stated that after the full self-driving beta program was installed, the failure occurred. The vehicle was taken to the dealer. The dealer transferred the contact to the tech department. The tech department informed the contact that they would repair the failure with an over-the-air software update. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 46,000.

While on autopilot or cruise control, the car would suddenly and abruptly slam on the brakes for no reason. There's no traffic or objects to avoid. It was very startling because it could have caused a massive rear-end collision had I not intervened to cancel the autopilot and speed up again. . Because of this, I have stopped using the autopilot feature altogether. I cannot trust it will work properly. I have mentioned it to Tesla and they simply say the software update will solve it. It has not!.

We received the full self-driving beta software from Tesla this week. How NHTSA has permitted Tesla to enable this software for use on public streets is mind-blowing. It is that dangerous! do the public a favor and go drive a Tesla with fsd enabled. You can read my full comments on our blog: https://nerdvittles. Com/the-10000-hoax-meet-teslas-full-self-driving-vehicle/.

The contact owns 2020 Tesla Model X. The contact stated while using the self-driving feature or the cruise control, the vehicle would brake independently. The contact stated an unknown warning light was illuminated. The contact stated he had experienced the failure on multiple occasion. The contact called the local dealer and made them aware of the failure. The vehicle was not repaired. The manufacturer had been informed of the failure by the app. The failure mileage was approximately 10,000. The VIN was not available.