Dithermaster
Member
My 2019 Raven Model S goes back and forth but the amplitude is not as large as these videos and the period is lower (4 to 5 second period). The engineer in me say it is due to a delay in the system which is causing feedback.
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Autopilot bobbing side to side
- Thread starter ShadowR55
- Start date
Lhshockey24
Member
This is interesting to find. We have this same issue on our X right now. Autopilot is unusable. I started a thread in the X forum too.
Lhshockey24
Member
2016 Model X, now on 28.3.1
Have had this issue for a few months, service center recommended replacement of B pillar cameras after diagnosis in July, had them replaced last week. dont see much improvement to the bobbing. Taking it back in next week, lets see what they say next
Service appointment tomorrow. Mine is so bad on the freeways it will activate traction control if I don’t shut it off.
Lhshockey24
Member
The service tech took one look at the new tires (different tread pattern) and said there’s your problem, I see this all the time. The only issue is that my previous tires were also a different tread pattern and I never had an issue.
got the car back, they said the Rea wheel toe was off and that the autopilot operation is now within spec. very marginal improvement, not happy, still waves slightly in lane, especially at highway speeds, higher the speed more weaving, frustrated.
I have a 2014 Model S with AP HW 1. It seems to do a similar weaving pattern when the AP is first engaged, but doesn't seem to escalate the weaving to the point that it attempts to cross the line. I notice this more on very wide lanes and unmarked merge lanes. I know I'm personifying the car a bit, but it seems to be "feeling" for the lane markings a bit.
Lhshockey24
Member
I have replaced the tires with Pirelli Scorpion all season plus and the issue was resolved.
Front 265/45/20
Rear 275/45/20
Front 265/45/20
Rear 275/45/20
Thanks, shall try that as a last resort, still have more that 1/2 life left on current tires. planning to play around with slightly different tire pressures, between front left and right to see if it makes any difference
Lhshockey24
Member
FWIW - the pirelli Scorpion mentioned above are giving me about 365wh/mi versus around 450wh/mi with the Michelin Cross Climate. (The same 100 mile drive we take frequently)
That’s ~270 miles of range to ~220 on our
X P100D
That’s ~270 miles of range to ~220 on our
X P100D
update, service center advised front facing cameras and front tires replaced, they also performed a wheel alignment. problem solved. it took 3 service center visits
Viro
Member
Same problem here on my 2018 Model S 75D, I'm a new Tesla owner and just thought this was typical but from what I am reading I guess not.
Dithermaster
Member
I have multiple theories on the Autopilot "bobbing":
- It's a feedback loop due to latency in the system. Could be fixed with some damping.
- It's because the output of the steering neural network are quantized and the software doesn't "blend" well between them. To make a contrived example, when the ideal steering angle is 5.5 degrees the system will use 5 degrees for a bit and then 6 degrees for a bit and then 5 degrees, etc., which results is bobbing back and forth.
- I know it's not this third one, but hilariously this weekend when Autopilot took a perfectly smooth country road curve as if it was a series of straight line segments (i.e., bobbed back and forth through it), I glanced over at the zoomed-in navigation display, and it in fact showed it as a series of straight lines segments (instead of the smooth curve it is). For a moment I thought, "well there's your problem" but it's surely just a coincidence.
5_+JqckQttqck
Active Member
Model 3 LR here with this issue. Google pointed me to this thread. Can't find a solid thread regarding this with the model 3.
Latest FW: 2019.40.2.1 38f55d9f9205
It started when they replaced the front steering rack with OEM 18" tires/rims back in mid September; the steering wheel is slightly tilted to the right. Two visits later (steering wheel is still slightly tilted) and they're blaming it on non OEM tires/rims but have a ticket open with Engineering to investigate and come up with a solution.
The SC manager said many people have this issue after swapping to winters. The caveat is that last winter I had the same rims and Nokians on and had no problems.
I feel like I'm going crazy as the SC has done an alignment (which I paid for) and they said it's within spec. Now they're blaming it on the non-OEM tire's softness.
I have an appointment with another SC and they texted me to drop by for a test drive - do another alignment for $240.00 +taxes CAD for an issue introduced after a warranty repair.
Any advice? Should I just drive it and wait for an update? Who do I ask for at the SC and how should I approach the conversation?
Latest FW: 2019.40.2.1 38f55d9f9205
It started when they replaced the front steering rack with OEM 18" tires/rims back in mid September; the steering wheel is slightly tilted to the right. Two visits later (steering wheel is still slightly tilted) and they're blaming it on non OEM tires/rims but have a ticket open with Engineering to investigate and come up with a solution.
The SC manager said many people have this issue after swapping to winters. The caveat is that last winter I had the same rims and Nokians on and had no problems.
I feel like I'm going crazy as the SC has done an alignment (which I paid for) and they said it's within spec. Now they're blaming it on the non-OEM tire's softness.
I have an appointment with another SC and they texted me to drop by for a test drive - do another alignment for $240.00 +taxes CAD for an issue introduced after a warranty repair.
Any advice? Should I just drive it and wait for an update? Who do I ask for at the SC and how should I approach the conversation?
There were quite a few complaints of M3 bobbing with the 2019.40.x FW
valem
Member
This seems to be a dead thread but I'm starting to have the same issue. Below 50 mph hardly anything, but above 65 mph it is really noticeable, making my GF sick.
The faster I go the more it wobbles.
Only on AP/FSDb Driving manual car is smooth as butter.
Had an alignment and made no difference. Tires are in good shape with lots of thread left... suspension inspected and all is tight ... no idea what to do next
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