I have an unusual situation with my 2018 Model S -- spontaneously while driving my power steering stops working and my dash starts cycling through several error messages, some of which included (video link):
This began ~2-3 years ago, and I have had multiple previous visits at Tesla during which they said they couldn't reproduce the errors or that the issues were resolved, but they have inevitably recurred. The issue used to be rare but now happens much more commonly, coming back in full force after the most recent update (which I tried to avoid but self-installed anyways). Now the power steering drops out while mid-drive about 7 out of 8 times when I take it out, which has put me in some dangerous spots. Even more confusing, I recently had a mobile visit where the mobile technician also noticed these problems and thought it might be the 12V battery, but he then sent me the following text afterwards:
I've put a pretty penny into the diagnostic work up trying to figure this one out and am dreading my visit with Tesla Service later today as being another Groundhog's day. Have any of you had similar issues or any thoughts as far as troubleshooting?
Any advice would be sincerely appreciated!
- Steering Assist Reduced (followed by power steering being disabled mid-drive)
- Park Assist Unavailable
- Lane Departure Avoidance features unavailable
- Regenerative braking temporarily reduced
- Automatic Emergency Braking reduced
- Stability control disabled
- Traction control disabled
This began ~2-3 years ago, and I have had multiple previous visits at Tesla during which they said they couldn't reproduce the errors or that the issues were resolved, but they have inevitably recurred. The issue used to be rare but now happens much more commonly, coming back in full force after the most recent update (which I tried to avoid but self-installed anyways). Now the power steering drops out while mid-drive about 7 out of 8 times when I take it out, which has put me in some dangerous spots. Even more confusing, I recently had a mobile visit where the mobile technician also noticed these problems and thought it might be the 12V battery, but he then sent me the following text afterwards:
He's since set me up with another in person visit which I will have later today. I have a sneaking suspicion that they will say the same thing -- that the errors aren't able to be reproduced or that the issue is fixed only to have it recur after I pay the bill and go home. Possibly related is that the coolant pump stays on after I park even when not using AC. I had a bad hit and run in 2018 where I was struck severely on the front left while I was driving, wonder if this is a residual issue though I don't think I could prove this to insurance ($35k worth of damage at the time). The mobile technician thought it might be a 12V battery issue, but he is really confused as to why the errors aren't registering with Tesla's main server. Also, replacing the 12V doesn't come up as one of the error messages (though perhaps it wouldn't if related to one of its connections and not the battery itself)?Something very strange is going on. The alerts that I saw when I was at your house can't be found. It's strange because it's historical data that doesn't get deleted. I'm super confused. If you could reach out to me next time the car acts up, I can try and catch the alerts. I think this is why the diagnostic team couldn't find anything. It's literally not showing up anymore at the time stamp I was at your house.
I've put a pretty penny into the diagnostic work up trying to figure this one out and am dreading my visit with Tesla Service later today as being another Groundhog's day. Have any of you had similar issues or any thoughts as far as troubleshooting?
Any advice would be sincerely appreciated!