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GPS location drifts off road

Discussion in 'Model X' started by mjnichol, Nov 28, 2019.

  1. mjnichol

    mjnichol Member

    Joined:
    Nov 27, 2018
    Messages:
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    Location:
    Kirkland WA
    My car is currently in service for this. Curious if this is happening to others, and how frequently?

    For me, multiple times per week, my location would drift far enough off the road I was on that the navigation system thought I was on either a parallel or perpendicular road to the one I was actually on, and would recompute my route. Of course, the worst consequence was being on the interstate with NOA and the car thinking I was on a parallel city street... and dropping my speed from 65 to 40.
     
  2. DCGOO

    DCGOO Active Member

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    Location:
    Indianapolis, IN
    #2 DCGOO, Nov 30, 2019
    Last edited: Nov 30, 2019
    Does this ALWAYS happen, to the point of TACC, w or without auto-steer being unusable? Does it happen at the same location all the time? Does it work ok anywhere else?

    The maps used for navigation are not the same google based maps displayed on the big screen and not updated all that frequently. This often happens with new or recently (within the last few years) changed roads. In some cases you can not even operate TACC at all. Unless there is something physically wrong with your GPS (unlikely, if it works at all), I would be surprised if service will be able to help you. Expect a report back that says they are unable to duplicate the problem.

    For years there was a new section of the beltway around Louisville, that was not in the nav map database. When driving on it, I simply had to disable all driving automation on that section of the highway, ignore all the speed warnings, and drive manually, even though the road was displayed accurately on the Map display. It was finally corrected last year sometime.
     
  3. mjnichol

    mjnichol Member

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    Nov 27, 2018
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    Location:
    Kirkland WA
    I've seen issues where the map does not match the road and it's understandable that this causes problems. The issue in my case, appears different--it happens in a variety of places and on roads that have not changed in 10+ years.

    Often what I see before this happens is that I have turned left or right on to a road and the car's displayed location gradually drifts further and further away from the road, as if the car thinks it's on a slightly different heading and is only using compass and speed to determine location. After some time (can be up to a minute), the car suddenly floats sideways back on to the road (seems like the GPS has finally corrected the car's location). This behavior makes me think it's a hardware issue. It may not be the GPS itself, but could be the gyro or compass? Just guessing as to the cause though. Hopefully they will replace the gyro board.
     
  4. BlueBonnet19

    BlueBonnet19 New Member

    Joined:
    Mar 13, 2020
    Messages:
    1
    Location:
    SW VA
    How did this get resolved for you @mjnichol? My M3 just recently started to do this. Currently it thinks it is parked in the middle of a forest a town over.
     
  5. mjptech

    mjptech Being cyberbullied by TMC users PhilDavid + DCEV

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    Location:
    Ventura
    Same here, my X started doing this recently. Well, I take that back, it has done it off and on, but I never knew we until yesterday.

    My HomeLink would fail to open every now and then, but yesterday, I zoomed in on the map and noticed it believed my X was about 50-100 feet off... It did the same today, and sure enough, my X was showing itself not even close to where it should be reporting.

    I'm guessing this might be something I need to get addressed with the SC...
     
  6. 3gmcintire3

    3gmcintire3 Member

    Joined:
    Feb 22, 2020
    Messages:
    8
    Location:
    Lago Vista, TX 78645
    My 1 week old MX just did something similar yesterday. For about 10 minutes it just drifted away from the actual location, telling me to turn on those far off streets. It finally stopped completely showing us a town that was 500 miles away.

    A soft reset did not help but when we locked it and went to lunch, it started working again
     
  7. mjnichol

    mjnichol Member

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    Nov 27, 2018
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    Location:
    Kirkland WA
    I've still been seeing the issue. They hoped that an upgrade to HW3 would help, but it has not. There was a particularly bad case in the past few days (gradually grew to be 1-2 miles off). I made 3 videos and sent them to my contact at Tesla.

    Most of the time when I see the issue, it drifts off by about 50 feet, enough to sometimes think I'm on a different road near the one I'm actually on.
     
  8. ElectricSteve

    ElectricSteve Village idiot

    Joined:
    Dec 11, 2014
    Messages:
    327
    Location:
    Switzerland
    Reboot the mcu. If that does not fix it, have the GPS re-centered at a SC.
     

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