2022 Tesla Model Y: adaptive cruise control problems

Filed Sep 24, 2026 · Driver assistance, Fuel system · FL · crash

The suspected malfunction involved Tesla’s Full Self-Driving (Supervised) and related automated steering, lane guidance, lane-departure avoidance and disengagement/warning systems. FSD was active before the event but changed to “Unavailable” approximately 1.35 seconds before impact as the vehicle began moving left toward a barrier. The exact cause has not been independently determined. The vehicle remains in my possession and is available for inspection, along with the EDR report and Tesla data files. My safety and the safety of others were placed at risk because the vehicle departed its travel path at approximately 65–67 mph. The warning and disengagement sequence provided only about one to one-and-a-half seconds before impact. The vehicle struck the barrier at highway speed, deploying the left side and curtain airbags. This created a risk of serious injury, rollover or collision with nearby motorists. The problem has not been reproduced or confirmed by a dealer because the vehicle was rendered inoperable. However, Tesla’s data confirms that FSD was active, became unavailable approximately 1.35 seconds before the crash, and that the steering angle moved sharply left immediately before impact. The data confirms the sequence but does not conclusively establish who or what initiated the steering movement. The vehicle has not received a technical inspection by Tesla or an independent defect specialist. Towing have handled it, but no one has technically evaluated the FSD or steering system. Crash data was retrieved from EDR. Earlier in the drive, the vehicle recorded “Autopilot features limited” and “camera blocked or blinded” warnings approximately 15 minutes before the crash. The vehicle later permitted FSD to engage. Approximately 1.46 seconds before impact, a hands-on warning was detected; FSD then changed to “Unavailable,” cruise control changed to standby and a lane-departure warning appeared less than one second before impact.

Filed Sep 5, 2026 · Acceleration, Driver assistance · FL

My chat constantly phantom brakes. This is a constant issue, I ve had the car since it was new and almost everytime im in adaptive cruise control it randomly brakes. Today with nothing in front of my on 3 separate occasions it applies the brakes and forces me to accelerate to maintain speed.

Filed Aug 8, 2026 · Driver assistance · CA

The Autopilot/FSD computer (driver-assistance ECU) on my 2021 Model Y (HW3) began failing intermittently on August 2, 2026, days after installing a software update -FSD v14 "Lite" branch. The component is in the vehicle and available for inspection. While driving at highway speed in high ambient temperatures (112–125°F), the system repeatedly disengaged with "Cruise control unavailable" (alert DI_a175) and "System error — take over immediately" warnings, and later alert APP_w46u on FSD engagement. Failures included: FSD and Autosteer aborting within seconds of engagement or disappearing from the menu entirely; complete loss of driving visualizations (no lane lines or vehicle overlays); rear camera blacking out; loss of speed-limit recognition and automatic turn-signal cancel. Both FSD and Autosteer Beta failed identically, indicating the fault is in the shared Autopilot computer/camera pipeline, not one feature. Because the same camera/compute stack supports automatic emergency braking, forward-collision warning, and blind-spot warning, the status of those safety systems during the failures is UNKNOWN — I had to complete long desert highway stretches fully manually, with repeated unrequested hand-backs of control creating a sudden-takeover risk. The fault is thermal-load related and intermittent: it recurred at high ambient temperatures, sometimes recovered after a rest or power-off reset, but on August 4 one full power-off reset at 88°F ambient failed to restore the system (it later self-recovered), suggesting progressive hardware degradation rather than ambient heat alone. Not yet reproduced by a service center: a Tesla service appointment is scheduled for August 13, 2026, and a service request with fault codes was filed in-app while the faults were active so remote diagnostics could capture them. No inspection yet by the manufacturer, police, or insurance. Public owner reports describe similar Autopilot-computer thermal failures on HW3 vehicle

Filed Jul 12, 2026 · Driver assistance · CA · crash · 3 injuries

Tesla Y on the freeway, FSD on(Full Self Driving), driving at 70 mph. I saw the cars ahead are slowing but my car was not slowing, so I braked and held the steering wheel firmly. However, my car still hit the car in front at 36 mph. The airbag deployed and luckily I only sprained my thumb in both hands in holding the steering wheel very hard. If I didn't take over my car would have hit the car in front at 70 mph. I downloaded Tesla "Vehicle Data Report" and it shows that the "FSD was active, Cruise Control State was active, Driver Monitoring Detection was detected and I applied the brake. I used FSD for over 3 years and no problem at all, until the accident. The Tesla Data shows that the FSD malfunctioned that caused the accident but my insurance told me that it was my fault and they increased my insurance for $227 a month.

Filed Jan 10, 2026 · Acceleration, Driver assistance · NV

While using cruise control at highway speed, the car suddenly slams on the breaks causing major panic. Oversteering onto incoming traffic and cars following are affected slamming on their breaks to avoid contact. Have contacted Tesla Service Center multiple times addressing the problem (Phantom breaking problem). What they keep on telling me is that there is no fix to the problem at this time. The cruise control intermittently turns off and on by itself with no warning or obstruction. No lamps warning or messages prior to failure. My Tesla 2022 Model Y (Performance) has been inspected at the Tesla Service Center many times, but to no avail problem still exists.

Filed Aug 23, 2025 · Driver assistance · TX

When using Tesla Autopilot (Adaptive Cruise Control) Tesla Curvature Assist will engage on straight roads during nice weather and great forward visibility. When Tesla Curvature Assist engages, the car brakes and slows dramatically. I have had drivers behind me think I was brake checking them or messing with them. This feature is dangerous and there is not an option to disable.

Filed Jun 17, 2025 · Acceleration, Driver assistance · NE

Tesla's FSD functions slowly has been reduced in the last years. Firts Tesla disabled the double pull function, resulted taken away the standard cruise control function. Lately, the fully paid ($12000) FSD is not recognizing streetsigns anymore, which worked perfectly before. This function is crucial to manage speeds, lanes, pedestrians and school zones or just attend in public roads! Tesla service center refuses to fix this issue or offer any additional solutions! This is very concerning and those vehicles with full FSD are not safe to operate on public roads anymore! Thank you

Filed Sep 6, 2024 · Acceleration, Driver assistance · WA

On [XXX], traveling westbound from [XXX] on [XXX] using adaptive cruise control. Pick-up truck rapidly pulled up behind and cruise control shut off, stated "unavailable" and Tesla started to brake...manually overrode. Travelled another 1/4 mile and reengaged cruise control after pulling away from following pickup. Pickup caught up and cruise control shut off again. At 4-way stop on [XXX] , rechecked system and then headed for [XXX] on adaptive cruise control. Pickup came up again and cruise control shut off. At next intersection I turned right and pickup turned left...had "electronics" sign on side of truck. Not able to get full name. Question: Is there electronic systems "out there" that can take control of Tesla adaptive cruise controls? I tried to pass this on to Tesla, but wouldn't or couldn't take the above message. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 8, 2024 · Acceleration, Brakes · NC

Phantom braking occurred when the adaptive cruise was engaged when a truck entered the road from the right side. The car abruptly slowed when the truck crossed my lane although there was no eminent danger. The car behind us nearly collided with us due to the sudden braking incident. This is the third sudden braking incident; however, the others were related to a bridge or overpass.

Filed May 23, 2024 · Driver assistance · GA

The adaptive cruise control doesn’t function correctly. I was on the freeway, which was 70 MPH, and all of a sudden the vehicle breaker abruptly while in autopilot. I saw that it registered the max speed as 40 MPH. It almost caused a collision.

Filed Apr 10, 2024 · Driver assistance · SD

Vehicle had a software update. After software update the car can see all speed limit signs while driving except for 65 mph sign. Traveling into a town car will register 45 mph, 35 mph, 25 mph signs and update the max speed to reflect the speed limit. However 65 mph signs are completely ignored. Resulting in the max speed being the speed of the last sign passed. Ie leaving a town where speed limit goes from 35 to 45 and then finally to 65 the speed on the car will only register the 45 sign and thus driver is unable to set the cruise or use autopilot at the correct speed. Contact was made with the service department but was told it was there was inconsistency between what the camera is seeing versus what is posted in the navigation maps package. It was submitted for review and will be fixed in the future but until then the only way to use cruise control at 65 is to get off onto a side road where no speed limit sign is posted turn around and get back onto the highway. I have since had 2 more software updates to the car and it is still broken.

Filed Apr 1, 2024 · Driver assistance · GA

In the Tesla Full Self-Drive adaptive cruise control system the set speed arbitrarily and abruptly drops from the set speed to 40 mph on an interstate highway. In other words, if set to 70 it will drop instantly to 40 mph for no reason.