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Power limited only at 80+ mph

Discussion in 'Model S' started by 3ryR, Aug 9, 2018.

  1. 3ryR

    3ryR Member

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    Video will help explain this better than words:


    I get this 100% of the time I accelerate past 80mph at full throttle. If I push it to 100 mph and ease off to maintain speed at 100, the yellow bars go away until I go full throttle again, then the yellow returns instantly as the power bar climbs back towards it. Since this started, I have been able to replicate this every single time I try.

    I just picked it up from service, they tell me that this isn't happening. They have seen the linked video and my description. I reproduced the issue on the first after picking up my car, and every subsequent attempt.

    Is there a known issue that can do this? Is there a word for it I can use to help them acknowledge it?
     
  2. zackmilo

    zackmilo 2.2M+ Youtube views on my Model 3

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    Sh*t does happen at 88 so.... Maybe your cars confused between 80 and 88
     
  3. brianman

    brianman Burrito Founder

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    Need more specifics on the vehicle config, age, etc.
     
  4. murphyS90D

    murphyS90D Member

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    It's obviously a pre-AP car. What was the temperature? Current from the battery is limited if the battery is too hot or too cold.
     
  5. dark cloud

    dark cloud Member

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    It is a CPO that is speed limited to 80 mph. Like a valet mode. Call Tesla support once the vehicle has been transferred to your name and they can remove the speed limitation. @3ryR
     
  6. appleguru

    appleguru Member

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    Huh? OP said in their post that they pushed it to 100 (and the video shows 90).

    FWIW, pretty much all model s will limit the high end under hard acceleration, especially at lower states of charge. Internal temperatures and state of charge are the two main contributors here.

    For max power, you want a warm (but not too hot), fully charged (100%) battery...
     
  7. dark cloud

    dark cloud Member

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    hmmm you're right, it does go to 88 mph before cutting power; that is quite a bit beyond 80 mph. Mine was like this, only I saw 135 km/h, which works out to 84 mph; I can't remember how far it went above that amount before it cut out or if it cut out exactly at 135 km/h.

    I would still call and ask if they see what it is, Post back and tell us the issue.
     
  8. tpham07

    tpham07 Active Member

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    yeah i've hit 98+ with the power bar still going up on a measly 75kwh battery. somethings fishy there.
     
  9. jjh1234

    jjh1234 Member

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    My MS was a demo unit and it did the same thing (although at 80MPH). Turns out it was limited by Tesla since it was a demo and they forgot to turn it off when I bought it. One quick call to Tesla and they turned off the limiter.
     
  10. TKTNURI

    TKTNURI Member

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    Had a similar issue with mine as well. I think it hit 85 mph at most. I sent an email was corrected by evening. Didn't ever go faster than that just tried to pass and it was limited. Now I can't seem to get it lower than 75 mph, car just wants to go.
     
    • Funny x 1
  11. dark cloud

    dark cloud Member

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    Then again, I have not tried to drive at 100+ mph with 5% SOC...
     
  12. vesder21

    vesder21 Member

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    my 2013 P85 has always done this too. i can get way past 80 MPH, but the yellow bars appear and cause the car to slowly accelerate anything past mid 80's. i'm curious to see what others with the same model year experience too.
     
  13. tstafford

    tstafford Supporting Member

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    Miss the old 6.2 speedo.
     
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  14. 3ryR

    3ryR Member

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    It's a 2013 P85+.

    It's not limited to 85 miles per hour and this isn't a new to me car. This happens at any speed over 80 or so - if I'm driving 100 and floor the throttle, it throws the yellow bars up to limit acceleration as soon as I have the pedal all the way down. It's not loaner mode unless Tesla secretly enables that on peoples cars without telling them long after they've owned it, and I can drive deep past 100 so that can't be it. Power is limited, but speed limit is not completely capped at 80.



    This error happens from all temperatures I've tried to reproduce it in, from 65F to 90F. All battery SOC from 100% to 50% - I expect limits at low charge but not at a full battery. Video above is 85% charged at 76F.

    This only started a month or two ago, it's new behavior. They replaced the contactors at the time this started (that was to fix a yellow box POWER LIMITED error and substantially less power available), but they tell me this is normal. It wasn't ever normal until after the contactors were replaced, and it's not normal now - it's limited power from something wrong.

    Vesder, it sounds like we have the same failure - I'll let you know if they can fix mine so you can ask for the same.
     
  15. BigNick

    BigNick Member

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    I get the yellow line on my 85 (not a P) and assumed it was normal - power output is limited to around 280 kW on those. Maybe they used a non-P part by mistake?
     
  16. 3ryR

    3ryR Member

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    The yellow line is never "normal" it means conditions are limiting you artificially. I've had S85 loaners that limit power to less than my P, but not with the yellow. I've been yellow limited by a battery below 20%, I've been yellow limited by frozen cold winter, and now I'm being limited by an unknown problem with the battery, contactors, motor, or electronics that is only obvious under full throttle at higher speeds.
     
  17. Don TLR

    Don TLR Member

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    Mine just started doing this while on a trip to Colorado last month and now happens over 77 where the yellow dashed bar comes into play. I sent in a bug report last week and was on the phone with Tesla Friday trying to track down the problem, again today making an appointment for next Friday. It started one time at low speed and now does it typically over 77. Don't worry about TPS they just ordered upgraded system after one tire went out and wasn't in yet, fixed now.. IMG_2081.jpg
     
  18. 3ryR

    3ryR Member

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    I was able to reproduce your slower power limit issue. I was consistently reproducing power limiting at 80+ and took it all the way to 110-115 or so for a while to see how much less acceleration it would give me as I went faster. When I slowed to 50 and then attempted to accelerate to 60 I was power limited again, and for much longer.

    This seems to be a battery temp or load over time issue. I pushed the battery harder, forced it to limit power for longer, and it responded by limiting power much lower in the band that I have been able to reproduce on a daily basis.

     
  19. 3ryR

    3ryR Member

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    Probably not good news, @Don TLR @BigNick @vesder21 - Got my car back from service with this note:

    So it sounds like the power limits are coming from a failed drive unit. I hit this multiple times every day and got the car back with the same problem; I don't know why they don't want to fix it but this sounds like it's going to need fixing sooner or later. This morning it was low 60s temp and I hit the limiter less than 5 minutes out of the garage, so it's not just a matter of thermal loads - any ambient temp can cause it so the thermal issue is a hardware fault.
     
  20. Don TLR

    Don TLR Member

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    Yes I had an odd limit early in the AM on a road trip and when I got to the supercharger it never happened again in cool low power environment..
     

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