2022 Tesla Model X: adaptive cruise control problems

Filed Dec 6, 2023 · Driver assistance · NY

The auto-speed (cruise control) associated with the latest software release, 2023.27.12, is experiencing a problem that had occurred in Tesla cars a couple of years ago, namely "phantom braking". In the previous situation, the "phantom braking" was random. In this software release it is reproducible and, in my case, occurs at the same location every time I drive in that location. The car slows in a few seconds from 50 mph to 23 mph or less until I take intervention. This is dangerous in traffic. It occurs regardless of the level of autonomy selected or whether it is in Auto-Speed only or Auto-Pilot.

Filed Aug 1, 2023 · Driver assistance, Steering · UT

While driving on an 80 MPH speed limit, 2-lane interstate in a rural area, the vehicle's "traffic aware" cruise control was enabled. The driver attempted to pass a semi-truck on left while the road was curving to the left. The vehicle's emergency lane keep assist appeared to engage causing the vehicle to swerve toward the semi-truck. The driver corrected back to the left, when doing so the power steering system failed causing the driver to apply significant force to the steering to avoid a collision. For the next 12 miles of driving the power steering never engaged and turning required significant force. While charging at a supercharger the error on the dashboard stating that power steering was not available persisted. Upon departure the error message went away and the power steering worked again. The manufacturer was contacted as the vehicle was under warranty. It was determined that no repair was needed after the power steering once again began to work, but the failure created a significant risk to the five vehicle occupants at the time of failure.

Filed Feb 12, 2023 · Acceleration, Driver assistance · DE

While on regular cruise control (not autopilot), our Model X will abruptly decelerate. This has happened before. Usually on highways I. Road trips.

Filed Aug 6, 2022 · Electrical, Steering · CA

The 2021-2022 model X “yoke” steering wheel is poorly conceived and a safety hazard. 1) horn location is tiny, and moves as wheel turns, impossible to quickly activate horn in emergency situations 2) high Beam lights are on a tiny button which also moves and cannot be activated when wheel turns or in an emergency situation, or even when choosing to cross an intersection during a yellow light because a car behind you is tailgating. 3) wheel shape: when used at lower speeds in autopilot Beta mode, the electronics literally rip the wheel out of your hands when turning right on residential streets. It is impossible to maintain hands on the wheel without risk of personal injury during some autopilot beta turns. Safety of the vehicle would be returned if the prior 2017-2020 round wheel with turn signal, wiper control, and gear selector stalks returned. The inability for the driver to control following distance in the ADAS (cruise control) systems without dropping 3 levels down into on screen menus is also unsafe.

Filed Jul 30, 2022 · Driver assistance · CA

"phantom braking" of the tesla optical-only (no radar or lidar) adaptive cruise control. northbound on hwy 101 around Gonzales CA there is a truck stop on the west side of the highway. proper signage and lane lines enable 101 traffic to maintain 65 mph. the insufficient optical-only system hit the brakes through the intersection and caused traffic behind me to brake suddenly as if there were an obstruction. i scheduled service but this is a system that should be tested much more rigorously before delivery. the sudden braking that the system employed caused a situation where driver input was required to avoid a collision. this is inherently dangerous and is avoidable by peers' ACC systems. has not been reproduced to my knowledge. no inspection of the system. yes, there is an audible alarm that the system is braking. too little, too late. one final thought: the ACC systems of vehicles in this class use radar and/or lidar to enable sampling of the entire electromagnetic spectrum that humans can monitor cost-effectively. for some reason tesla made the insane decison to go optical-only, robbing their system of at least 10 times the data. the detriment in available data that an optical-only system has to overcome is too great to solve with nifty software. tesla's decision endangers drivers of their cars and, most importantly, others on the road.

Filed Jul 11, 2022 · Acceleration, Brakes · TX

Travelling at highway speed with cruise control on, the brakes came on hard as if there was an upcoming collision, slowing the car by 25-30 mph. But there was no car or obstacle ahead of mine. I was able to immediately accelerate back to speed without further incident. And fortunately, the cars behind me were able to slow down without hitting me. This is the third (3rd) time this has happened. The previous was less than two weeks ago on city streets without cruise control and I don't remember the first which happened shortly after getting the car in March 2022. I noticed that others have had a similar experience, which led me to submit this report.

Filed May 15, 2022 · Driver assistance · DE

Two times in last 3 weeks while our Tesla Model X Long Range attempted to emergency or "phantom stop" while cruising at 65 MPH. Both instances occurred when there was a car crossing the highway well in advance (approx 50-75 yards) of our vehicle position. First instance we were utilizing Auto Pilot, second instance was while using Adaptive Cruise Control.

Filed Mar 28, 2022 · Acceleration, Brakes · WA

Vehicle repeatedly applied the brakes while on cruise control. This sometimes seemed to be a response to other vehicles approaching in the oncoming traffic lane, but sometimes seemed totally unexpected. Once, the vehicle even sounded the collision alarm when no collision danger was present. If someone had been following me closely, the inexplicable braking could have caused an accident. A search of Tesla forums shows this is a common problem with these vehicles.