2021 - 2022 KONA Electric - Check Electric Vehicle System Error

Discussion in 'Hyundai Kona Electric' started by NS KONA Elec, Sep 3, 2021.

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  1. Are you the owner of a 2021 or 2022 Kona Electric who has gotten this message on their dash?
    If so, please respond and post. Basically, I am trying to find out how widespread this issue is.
    I received the message about 3 months after buying my 2021 Kona Electric (13000km). It stopped my car from moving and had to be taken to the dealership for a battery replacement. The dealership did a full investigation of the BMS (took about a week) and the result was I needed a entire traction battery replacement. So, it has been 7 weeks and I am still waiting with no end in site.

    If you are in a similar circumstance, please come forward and post. I have seen several posts on this forum already from other users and encourage them to tell their stories.
    Create an account, and tell your story.

    Thanks and take care


    Attached Files:

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  3. hobbit

    hobbit Well-Known Member

    So, what was the actual problem? Bum cell block? BMS that lost its marbles?

    NS KONA Elec likes this.
  4. The service manager at Hyundai didn't have alot of details. His comment was that after the 2019-2020 fire issues, the battery management system was updated as a safety precaution to more "rigorously check" and detect cell/pack anomalies early (and prevent a fire). The error came up in the morning after I had finished charging in my garage overnight. The BMS detects a potential safety issue and then disables the vehicle. BMS did it's job. Then the vehicle goes to the dealer (on the back of a flat deck tow truck) for full BMS/battery inspection with the specialists (from head office) remote desktopping into the local dealers system. The specialist's conclusion (after running the test twice) was that the battery needed replacement. They can't clear the code because it is a real "physical" issue internal to the battery. Vehicle can't be driven, "do not pass go and do not collect $200" and so I wait in the long line up for a new battery 7+weeks and counting.
    Last edited: Sep 4, 2021
  5. I have the same pack as you listed here:
    Same part# & BMS ROM ID - 37501 - K4054, 6980...mine was manufactured 2020/08/27.
    It appears you drive a lot more than I do, mileage ~5500 km.
    I have always been gun shy of charging to high levels and have kept the max charge level to ~85% when required.
    Usually hovers in the mid 60s to 70s. When the vehicle was delivered new, it was at 40%. Half AC @6 - 7 kW, and half DC ~30 to 50 kW. Never at night - and let sit, always charge and drive to ~80% level.
    Also keep my regen at level 1 to avoid continual recharging, only optimizing higher level regen when stopping.
    Wonder how many of these defective packs have been charged to 100%, regularly and on a daily or regular basis, perhaps others with the same issues could chime in and supply their charging info as well.
    Until this problem is resolved for good, my charging will stay that way as I cannot afford to be without wheels for long period;)
    NS KONA Elec likes this.
  6. Do you know what code the car threw? I've been dealing with P0B5900 that has surfaced twice on my 2021 but "fortunately" has not bricked the car yet!
    NS KONA Elec likes this.
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  8. Hi Eddy, Dont take this the wrong way, but it seems to me like you are extremely cautious with your Kona. Perhaps this suits your life style (retired? if you only charge during the day?) rather than you being hesitant about using the kona.
    I never imagined that I put alot of kms on the kona. Lets do some math. I had it for 4 months. Used it mostly for daily commute to and from work, say ~100km round trip 5 days a week (~2000km/month comes to ~8,000km). Wife drove it in evenings/weekends for shopping and kids activities (over the 4 months this comes to about 4000km or 26km a day). Typically, it would be charged once or twice a week. Always used the Level2 charger in my garage (at night). Definitely kept it at 80% max for home charging and would recharge only around 20%. Wife did 2 road trips which required a Level3 charge about halfway through the trip (say 700km per trip for a total of 1400km). Prior to the trip, the kona was charged to 100% in the garage at level2. While on the road, the charge limit was set to 80% max on the level 3. We always left the vehicle on level 3 regen. The kona came from the dealership with 100% charge. Salesman said they were made for driving and so we did and we enjoyed it while it lasted.
    So lets review the math.
    Daily driving over 4 months came to ~8000km. or 100km per day.
    Evening/weekends over 4 months came to ~4000km or 26km per day.
    2 Road trips that were about 700km each comes to ~1400km.
    Grand total is about ~13400km in 4 months.

    By comparison (5500km) it appears that you dont drive that kona very much, maybe 20-30km a day?

    So, basically I bought the car to drive it. Never abused it. Left it in "eco mode". These are all the sorts of things that Hyundai Canada has advertised as being fully capable in this vehicle. If the reality is that the vehicles shouldn't be used as advertised, then I wish someone would have told me that when I bought its
    Last edited: Sep 6, 2021
  9. No idea. I do have an OBD2 reader, but to be honest with you I never thought to put it on the kona before they took it away on a tow truck. I did google the "check EV system" warning and watched the Youtube video for how to pull the positive connector off of the battery terminal with the 10mm socket. But never did it. New car, under warrantee and really something that I am not familiar with so decided not to screw with it. I left it to the dealership to diagnose. In the end it seems as though it was a very significant problem.
  10. Just did a quick search of OBD2 codes. Your code looks funny. Not an OBD2 expert at all, but I think that the last 2 digits are "hex" codes. Perhaps your reader is out of date and the actual code is "P0B59"
    It seems to me that P0BXX codes are reserved for electric/hybrid vehicles. Not sure how "compliant" or "standard" the codes are across makes and models but I did find this....It definitely doesn't list your code as provided, but does list P0B59, and some of the codes in that list look concerning. You might want to get that checked out.
    Here is a link to where I found the codes.

    Attached Files:

    Kirk likes this.
  11. My particular OBD2 is not compatible with the Kona EV but rather got the code from the invoice given to me after my 2 visits to the dealership. More specifically it states "Battery Voltage Sense "G" circuit".
    In my case it seems to be an intermittent fault and am simply waiting for it to pop up at a moment where I can bring it in and have them witness it first hand!
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  13. Hillel Soberman

    Hillel Soberman New Member

    After two weeks of no car, I picked up my car today.
    • No charge on the fix (which took 15 minutes of tech time, but two weeks to get the appointment and 1 week sitting on their lot).

    Tech found DTC P1AA600 code

    Perfomed BMS (Battery Management System) Logic Upgrade 00D118RA
    • I think this was entirely a software update.
    Some details from Hyundai about recall: HMA TSB (nhtsa.gov)
  14. 196 was an update October 2020, almost 1 year old, thread on it.
    ScubaSteve likes this.
  15. I'm now in the same boat over here in Europe (The Netherlands)...

    Just got my Kona (pre FL version), drove with it 3 weeks about 2000km. Got the BMS update and next days after charging also got the warning (but could still drive). After that had to leave my car at the dealership for battery replacement. Car has been standing there for almost 4 weeks now...

    How long did it ultimately take for your car to get the new battery shipped?
  16. Tomek

    Tomek Active Member

    LG Chem battery or SK Innovation? I have an SK and I have traveled about 20 kkm since January, I charge to 100% every 2-3 days (always AC, I only charged DC once, up to 80%) and so far, knock wood, I have no problems (apart from squeaking stabilizer).
  17. Not sure, they didn't tell me. Can I tell from the VIN some how?
  18. hobbit

    hobbit Well-Known Member

    I just looked this up in the DTC list I got from hyundaitechinfo site, and it *is* listed as P0B5900:
    battery voltage sense 'G' circuit. Maybe the trailing 00 is a sub-code or something. To me, that
    implies something amiss with the BMS sensing circuit itself, not necessarily the condition of
    a cell block. Which might still need opening up the pack to fix... not fun.

  19. MartinC

    MartinC New Member

    Joined forum today to report my March 2020 Kona has joined the "Check Electric Vehicle System" failure club. Actually for the second time. First time in a Car Park 2 months ago on an AC charger, I pulled the cable and it come out whilst the power was still on charger, so found video on-line and reset by pulling 12v battery and all worked OK and I put it down to EMI issue with hot switching the charger.
    Today Kona was in the garage on Home charger to 100% overnight (as travelling long distance) and disconnected and found CEVS messaage on dash. Thought I knew what to expect, i.e. no drive, which was right, but disconnecting and reconnecting 12V battery did not clear the fault. (tried 3 times!). So out comes AA man (disguised as Hyundai Assisstance) scratches around nothing happening. Then he gets he ODB Bosch(?) reader and plugs it in the port. Sucks out all the data and hay presto Kona clears the CEVS message and we are off.
    Interesting while I was on test drive AA man looks at OBD data and finds a fault still active message ?? So he's emailed me the data (should get it in a couple of days) So now I'm booked in to main dealer 5 days away, are they going to take may car away for 2 months? What's the issue really? Are all the batteries dud?
    Will be only charging to 90% in the meantime!
  20. I have (had) a 2021 that started popping the “check EV system” and was able to clear it a few times, both at the dealership and by myself. Dealer eventually told me the car had to stay and has now been on their lot for nearly 2.5 months with no information forthcoming other than it needs a new battery. I’m a pretty patient person and understand that things break but the lack of information has been testing me, how long is it acceptable to have my new car? I hope your situation doesn’t end up like mine!
  21. Sue

    Sue New Member

    My 2021 Kona EV has been dead at the dealer since August 15th. I had it for 2 months - Hyundai has now had it longer than I have. Really sick of making payments, insuring it. Waiting on offer from Sedgwick at this point.
  22. It was September 16th when my car was confiscated, so I empathize with you completely.
  23. Chris H

    Chris H New Member

    Hi, another user with the ‘Check Electric Vehicle System’ here. After a while this changed to ‘Check 12V battery’.

    This was after a 300 mile journey with two rapid charges. I unplugged the Kona from the rapid charger last night and got this message. The car had stopped charging at 91%. After coming back to it after five hours it started immediately with no error!

    I now have the return journey tomorrow and am apprehensive as I will need to rapid charge once.

    Any advise is welcome! I guess the first thing is to knock the maximum charge down to 90%?

    Attached Files:

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