All Driver Assistance Features Shut Down While Driving On The Highway

[Cyberius Wilhelm]

While driving on the highway, maintaining speed between 80-88mph for a prolonged amount of time, (typically 15 minutes or more), all Driver Assistance features shut down with accompanying fault messages: Cruise control disabled, stability control disabled, traction control disabled, automatic vehicle hold disabled, automatic emergency braking is unavailable, lane departure avoidance features unavailable, adaptive ride control degraded, and vehicle hold feature unavailable.

And most noticeable, regenerative braking is disabled for the remainder of the drive.

Initially this only happened not using FSD, but recently trying to avoid it from occurring while using FSD it also happened, (Hurry & Mad Max). Below 80mph it has not occurred, but the flow of traffic is commonly 80+ mph and nearly every prolonged drive this happens.

Pulling off, parking, and doing a reboot has not worked to restore the features. It takes parking and the vehicle sitting for a prolonged time to restore them.

The local Tesla Service Center has no known remedy. Has anyone else had this happen and had it successfully fixed?

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[UberNoob]

FSD is only going to work up to 85, forcing it over will disable it and earn you a strike. Takes a full week to loose/ forgive a strike, get 5 strikes and your in FSD jail for a week.

When your issue happen and you pull over to reset it, first go into service mode and view all the alerts, you can click each alert and view what condition triggered said alert. One of them will point to the underlying cause. Your issue could be a plethora of things ranging from overheat, lack of can buss communication, or AI computer beginning to fail.

My issue not exact but on the way back from Michigan 600 miles or so, FSD would randomly cut off, red hands saying take over immediately. There would be an error on the screen pop up briefly saying self driving disabled due to system error. A few miles later I could re enable it. Fast forward a week and I goto my kids ball game leaving the game started the truck and message on screen says. AI computer requires service self driving disabled. Went into service mode and alert said permanently disabled. Took it to service and they had to replace the whole computer.

 

[steveB]

Your issue happened to me. I was driving with FSD engaged and the navigation took me down a declining offramp. All the alerts lit up and said degraded and to use manual breaking. I made an appoint with service when I got home. It cleared after a restart, then a week later it happened again, while FSD engaged and driving down the highway. I had to manually break. Then it happened a 3rd time. My appointment was 2 days after the 3rd time. Tesla disconnected the parking break wires and some other stuff, reconnected and cleaned them. They didn't see any problems. They did see the alerts which occurred but couldn't find anything wrong. They charged me $250 for diagnosing as they found nothing wrong so warranty didn't cover. That said, since they did the work 3 weeks ago, the problem hasn't reoccured.

 

[Cyberius Wilhelm]

Glad to hear that your problem hasn't reoccurred.

My issue has been resolved as well. The error messages occurred as a result of the speed sensors not matching the wheel speed. To correct the issue I installed four new matching tires and reset the tire service to new and selected the type of tire that was installed. After several trips of driving above 80 for prolonged periods of time, the issue has not happened again.

 

[Alpine]

If that's what's causing the issue, then all trucks driving on a different diameter tire should have this problem since there will be discrepancy between wheel speed and sensors. There's people running 37 inch tires without issue

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