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Strange Issue Driving Straight

dskid

Member
Sep 16, 2018
65
38
Vancouver
Okay, so the issue isn't quite as egregious in these videos. Not sure if that's the wheel/tire change or different roads. Things I did discover:

1.) The vehicle wants to follow the bank of the road. Most roads are slightly banked to the right, so the car always wants to go right. I have 30 minutes if video of me driving constantly correcting the car after it was set straight, then slowly wanders right (or left if the road banks that way, but generally right). For fun, I tried the same thing in my Model 3 and it keeps driving straight. Suspension on the X is Standard, if you're curious. Tires 45 PSI cold.

2.) Bumps cause the wheel to move. I get it over large bumps and train tracks, but small road imperfections were a bit surprising. However I can't say I would have noticed this before or not. This is also not the problem I'm posting about, but including in case it's relevant.

3.) The SuperWide aspect of the video makes it a bit more difficult to see the subtle movement of the wheel. In future I may place markers on the wheel and/or use a less-wide aspect.

In thinking about it, it is curious that wheel movement over bumps. When I was changing to the summer wheels, I gave the wheel a good shake and it seemed solid. My last vehicle had play, this did not. The most frustrating thing is the car just won't stay straight without my constant intervention

And now for some video content:

Video 1
The first video shows the movement in the wheel not done by me or bumps (anything of me adjusting was to stay in the lane/on the road). I was slowing down at the end, so say what you will about regen being a factor there. This has happened quite often without regen being involved, and generally has no relation to speeding up/slowing down as I automatically excluded those events in my mind so I'm not confusing torque steer (for instance) with this issue. I included primarily because it was the best example in this run.

Video 2
This second video shows going over some minor road imperfections and the reaction the wheel has. Again this issue I'm experiencing is not localized to road imperfections, but could be a symptom of the problem.

Video 3
This third video shows the "bank turn" the car follows the road's initial bank to the left just after the train tracks and back to the right. it also shows the wobble of the wheel over the tracks but I can't say I'm surprised especially considering the angle of them.

If everybody else's Model X drives like this, then hey, that's just the way the car is. It's easy to overcome but feels unnatural. I hope I'm not hyper-focused on it now and that's why it bothers me. But I'm almost certain it never did this when it was new. Correct me if my memory is failing me.
 

dskid

Member
Sep 16, 2018
65
38
Vancouver
Okay, so the issue isn't quite as egregious in these videos. Not sure if that's the wheel/tire change or different roads. Things I did discover:

1.) The vehicle wants to follow the bank of the road. Most roads are slightly banked to the right, so the car always wants to go right. I have 30 minutes if video of me driving constantly correcting the car after it was set straight, then slowly wanders right (or left if the road banks that way, but generally right). For fun, I tried the same thing in my Model 3 and it keeps driving straight. Suspension on the X is Standard, if you're curious. Tires 45 PSI cold.

2.) Bumps cause the wheel to move. I get it over large bumps and train tracks, but small road imperfections were a bit surprising. However I can't say I would have noticed this before or not. This is also not the problem I'm posting about, but including in case it's relevant.

3.) The SuperWide aspect of the video makes it a bit more difficult to see the subtle movement of the wheel. In future I may place markers on the wheel and/or use a less-wide aspect.

In thinking about it, it is curious that wheel movement over bumps. When I was changing to the summer wheels, I gave the wheel a good shake and it seemed solid. My last vehicle had play, this did not. The most frustrating thing is the car just won't stay straight without my constant intervention

And now for some video content:

Video 1
The first video shows the movement in the wheel not done by me or bumps (anything of me adjusting was to stay in the lane/on the road). I was slowing down at the end, so say what you will about regen being a factor there. This has happened quite often without regen being involved, and generally has no relation to speeding up/slowing down as I automatically excluded those events in my mind so I'm not confusing torque steer (for instance) with this issue. I included primarily because it was the best example in this run.

Video 2
This second video shows going over some minor road imperfections and the reaction the wheel has. Again this issue I'm experiencing is not localized to road imperfections, but could be a symptom of the problem.

Video 3
This third video shows the "bank turn" the car follows the road's initial bank to the left just after the train tracks and back to the right. it also shows the wobble of the wheel over the tracks but I can't say I'm surprised especially considering the angle of them.

If everybody else's Model X drives like this, then hey, that's just the way the car is. It's easy to overcome but feels unnatural. I hope I'm not hyper-focused on it now and that's why it bothers me. But I'm almost certain it never did this when it was new. Correct me if my memory is failing me.


So just an update. I drove the same route in my 3, and the road banking has the same effect on it. So it seems holding the steering wheel is part of the normal operation of a motor vehicle. hah. The bumps while they do move the wheel of the 3 slightly, is not as dramatic as the X. However, the X has air suspension so I'm assuming that has something to do with it.

The curse of the original problem was hyperfocus on everything steering related, and not knowing what's normal and not (because I had never paid this close attention to it). Obviously I've swept up some other things that are completely normal in trying to prove there is actually an issue. I have a feeling as it warmed up the snow tires may have had an outsized impact on this strange occurrence, because it is very subtle is the few runs I've done and almost non-existent. I don't feel there's much point bringing it to Tesla as if they couldn't find it when it was decidedly far more obvious, they certainly won't find it now that it has become far more subtle. I guess we'll have to see how it behaves the next few months to see if this issue is gone or just gone into hibernation.
 

Mandarin

Member
Mar 3, 2020
325
1,194
Seattle, WA
I have something similar after the latest update 2021.4.18.

My car is a 2016 MX P100D with MCU2 and HW3 with FSD.

1 day after the latest update I have noticed there is some tension or glitching on the steering wheel when I make turns on any roads with any conditions.

I have turned off all assistant features but it did not help. Even disengaged an autopilot feature.

After I tried to reboot the car. No changes.

Then I did power-off for 5 minutes and the problem has disappeared but came back 1 day later. After another power-off problem has cleared again. And seems like it's a glitch loop. For me, it seems to be some software issue. People also were reporting this problem since 2018 over the internet.
 

dskid

Member
Sep 16, 2018
65
38
Vancouver
I have something similar after the latest update 2021.4.18.

My car is a 2016 MX P100D with MCU2 and HW3 with FSD.

1 day after the latest update I have noticed there is some tension or glitching on the steering wheel when I make turns on any roads with any conditions.

I have turned off all assistant features but it did not help. Even disengaged an autopilot feature.

After I tried to reboot the car. No changes.

Then I did power-off for 5 minutes and the problem has disappeared but came back 1 day later. After another power-off problem has cleared again. And seems like it's a glitch loop. For me, it seems to be some software issue. People also were reporting this problem since 2018 over the internet.
If this happens for you during turns, you may need a new steering column. There is a known issue that can eventually seize the steering column. In fact, they assumed I was having the same problem initially and had ordered a steering column in case it was that issue. It was not.

My issue is still subtly present but Service and I are at an impasse. So either it gets bad enough that Service can recognize a problem or we trade it in on a refresh, if they ever come out. hah.
 

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