2016 Tesla Model X: adaptive cruise control problems

Filed Mar 19, 2025 · Steering · OH

I had cruise set at 60mph on 2 lane highway. Their were rumble strips in center as well as edges of the road. I approached 2 slow moving vehicles (adaptive cruise was on) and then used turn signal, took over control myself disabling adaptive cruise. I pulled back in across the center mark after passing vehicles. When i crossed the 12" wide center rumble strip my car immediately threw up a message on the screen and i could barely turn the wheel to prevent the car from driving into the ditch on my projected path back into my lane. The car got straight finally but the wheel was nearly impossible to turn. A few miles later, I approached my ramp to take and slowed down to 15mph under the ramp limit and it took nearly everything to get the wheel to turn 15 degrees to make my turn. i pulled off very slowly into a graveyard right off the road and parked the car. i took pictures of the messages on the screen "EPAS_w002 Steering may require increased effort" on the center screen and the similar message on the center screen "Steering assist reduced steering may require increased effort". I did a computer reboot (hold 2 buttons on steering wheel), left the car with my key and locked it ad walked away for a minute. I reapproached the car, it unlocked, and i turned the car back ON. Everything worked when i got on the highway with the exception of Autosteer (beta). It would not set, so i disabled it on the center screen. I turned it back on this morning (next day) and it is fully functioning again. I do not know how i didn't end up in the ditch at highway speeds, but i feel this needs reported and a solution found before I or someone else loses steering. I'm not sure the center rumble strip had anything to do with it or if it was coincidental, but the car always does a shimmy when you cross rumble strips in the center of the road (switching lanes) regardless of speed.

Filed May 31, 2024 · Brakes · VA · crash

On May 30, on a 55 mph highway, my Tesla Model X was traveling at highway speed in thick traffic. The vehicle was using cruise control, but not auto pilot. In other words, the auto steering function was not engaged. A vehicle that the Tesla Model X was following came to a sudden, unexpected stop. I applied the brake pedal with full force. The anti-lock brakes engaged and the brakes began pulsing (normal anti-lock brake behavior). However, while the brake pedal was depressed with full force, the anti-lock brakes stopped pulsing and the brake pads disengaged from the rotors. The car coasted as if the brake pedal was not depressed. The brake failure resulted in a frontal collision with the stopped vehicle. A police report was filed at the scene of the crash. There were no physical injuries and the Tesla Model X was driveable after the incident. However, the car that was struck had significant damage (but no bodily injuries). Because the Model X was driveable, I attempted to recreate the incident 12 hours later. However, as I tested the brakes, they behaved normally. With the fully depressed brake pedal, the antilock brakes stayed active until a full stop of the vehicle. Is it possible that the frontal collision system malfunctioned? As the frontal sensors detected an impending crash, did the car's computer disengage the brakes mistakenly? The car had no warning lights prior to May 30. However, at the exact time of the crash, two codes were registered. (I used the Tesla service mode to access them). One code states the anti-lock brakes were active. The second code registered exactly 2 seconds later and states "Pedestrian safety system fault". There is a police report, but we have not received it yet. I had to check NO in the form because the form would not allow me to move forward unless I uploaded the report. I can upload the police report when I receive it.

Filed May 31, 2023 · Acceleration, Driver assistance · NC

Two issues that are concerning and I have told Tesla: 1. The car will be on cruise control and I will be relaxed and all of a sudden it will just brake for no reason. Praise God I am aware of it now and prepared so I have to compensate, but it is very dangerous and made the cruise control useless. While it was under warrantee I request it be fixed, but they said there was no way to do that. 2. The car's back up screen is compromised and has a distortion on the bottom that was caused by a download. I requested four separate times a service requests to fix it while it was under warrantee, but they were unable to repair it. The first time they said I needed to wait for a download, then the second time they said it was a hacker, third time they replaced a chip, and the four time they told me to repair it I need to upgrade my entertainment package for $1500 so I cancelled the appointment. All while I was under warranty. Four appointments later and I still have a distortion on my screen when I back up which is slowly getting larger and will be a safety issue I'm sure down the road. Two very obvious safety issues that while under warranty they would not fix. I wrote Tesla and asked them to review my service requests and to get some resolution. I was unsuccessful.

Filed Jul 20, 2022 · Driver assistance · LA · crash

On July 13, 2021 at round 1951 hours, in broad day light at that time of Summer, The Tesla Model X , 75 D, was engaged in autopilot mode travelling westward at posted speed limit of 50 mph on a local highway road. The vehicle failed to slow down by using "ADAPTIVE CRUISE CONTROL" but went ahead and hit the parked Dooley Truck at Red light, causing crumpling of the front of Tesla and some dent in the vehicle that got hit by it. It failed to give enough 'FORWARD COLLISION WARNING" to apply brakes. It did not deploy "EMERGENCY BREAKING SYSTEM", to avoid the Collision. When the Forward Collision sound was heard, it was too late, and when the brake was applied, it disabled the whole Vehicle and collided and stopped. The Air bag was deployed, but with minor injuries to the Drivers. The front of Tesla was crumpled as designed, and also as there is no Engine but only a Bonnet in front, it easily collapsed on itself. An Investigation was done by Tesla, and they called to say that, Quote: " The Auto pilot feature was on, the vehicle was driving at 50 mph, that is the posted limit on that highway. They could not confirm whether the hands of the driver was on the steering or not? That means they say the hands of the driver may be on the steering wheel, but cannot confirm it? The brakes were applied by the driver 45 sec before the crash, which disabled the main battery of the vehicle and resulted in crash". There were no warning lamps, messages of other symptoms prior to failure, except a warning sound very close to crash". The vehicle was not drivable after the incident, and do not know if this feature was reproduced by independent service. Repeated request to give the above telephoned report from the Tesla Agent has not resulted in any such letter from them.

Filed Jun 4, 2022 · Acceleration, Engine · IN

The car started giving error messages of systems failing one after another on the highway. It slowed down instantly as if someone pressed the brakes and I could not accelerate. Obviously I did not press the brakes. There were a lot of vehicles behind me and this could have easily caused an accident putting a lot of people at risk. I had to get off the highway asap and get the car towed. The error messages included charge port disabled, automatic emergency braking is disabled, power reduced, traction control disabled, stability control disabled, cruise control disabled, power reduced. Tesla diagnosed and confirmed this being an issue with the onboard charger being faulty and replaced that with charge port itself for a total of $3727.60. They refused to cover any part of this which I think should have been taken care of by the company.

Filed Feb 17, 2022 · Driver assistance · CA

phantom braking on freeway. quick deceleration from approx 65mph to 40 mph for no reason causing vehicles behind me to reduce speed suddenly and swerve to prevent collision with my vehicle. Not reported to Tesla. I do not drive on freeway frequently but it does cause me concern when i do drive on freeway and engage cruise control/autopilot. Occurs with no warning.

Filed Sep 30, 2016 · Acceleration · 2,000 miles · CA

Here is a new complaint of unintended acceleration which sounds highly credible. Https://forums.tesla.com/forum/forums/near-accident-while-parking-just-now near accident while parking just now!! Submitted by hami05 on september 29, 2016 wow guys I've seen those unintended acceleration threads before and thought that the person must've always definitely been punching the accelerator, but I'm not so sure after what just happened to me. Please hear me out, because my son and I are frankly quite scared right now. I was driving into a parking lot and I just lightly pressed the accelerator as I was going under 10 MPH and all of a sudden my x went from 10 to over 40 MPH in about 2 seconds! I didn't even know the thing could accelerate that fast! Can anybody explain what the heck might've happened? Thankfully I was about 100 ft away from any other cars before it took off, so I had time to slam the brakes without panicking, otherwise who knows what would've happened... I'm certain that I didn't accidentally activate cruise control/ap, so there's no way that could've caused it. My theory is that the regenerative brakes may have given me a sudden kick of acceleration? I'm kind of worried now, because this is actually the second time something like this has happened to me, except the first time wasn't nearly as bad, so I didn't ask you guys about it. Has anyone else had this happen to them? Do you guys think I need to ask my tesla team about this? This hasn't only happened to me while getting ready to park, the first time I was just accelerating up to 25 in my neighborhood and it suddenly went to 35 in a second but I wasn't too bothered about that, because it was just a 10mph burst, but this one that happened to me today was the car jumping 30 MPH... I've driven this car for 2000 miles now and it's the only car I've been driving really over the past month.

Filed Jul 20, 2016 · CA · crash

On april 30, my husband was driving my new model x on the freeway. It was a sunny day. He disengaged autopilot to change freeways. After he changed freeways, he re-engaged autopilot. The car followed the curve on the new freeway, turning to the right, but when the freeway straightened out, the car kept turning and hit a guardrail on the right side. No warning, no braking, no stopping. Tesla tells us that the autopilot was not re-engaged and was just in cruise control (I don't know how the car would be following the curve in the road then). Also, that it's algorithm correctly instructed the car to hit the guardrail at full speed rather than to stop or beep a warning. At best, tesla suffers from a design flaw (how could my husband incorrectly think he was in autopilot mode; how could the algorithm make us crash when the freeway was pretty empty). At worst, tesla is covering up their mistakes.