2021 - 2022 KONA Electric - Check Electric Vehicle System Error

Well almost a month out with no end in sight. Hyundai is working with me and I have an assigned rep.

 

A bit of an update... well there isn't one really, we're still driving the Mercedes rental car and still have no idea when we will actually take possession of our 'new car' that was delivered on the 2nd of September 2022. Seriously... the car will have depreciated 40% by the time we get the damned thing!

The dealership has said they're still awaiting a part that's coming from S. Korea but they have no idea when it will actually arrive, best they can give me is ETA: Jan 23. Considering the car after ordering went from ETA: Feb 22 to ETA: Apr 22 to ETA: maybe Jun/July 22 etc I'm not confident we'll see it soon.

They did vaguely explain what the part is they're waiting for... it's basically equivalent to an ECU but for the traction motor (apparently sits on top).
So far then we've had some undescribed work done, then the traction motor was replaced, and now waiting for the 'ECU' which they 'hope' (dealership's words not mine')

So, my advice to anyone thinking about getting one of these cars firstly is DON'T, but secondly if you do eventually get one, make sure you have a backup plan because it seems like Hyundai don't, and they certainly don't have the expertise, parts and logistics set up to properly support them.

TL;DR
Still waiting for a part almost 13 weeks since we collected the car from the dealership, current ETA for part delivery Jan 23... and if it turns up 'hope' it fixes the issue.

 

Has anyone else had issues with high voltage charging not working but it charges fine on level 1?

 

Happened again for the 3rd time. I have been charging 100% but only gave me 80% this time. Called hyundai but they do not have open schedule to work on my car till december or some thing... that is some BS.

 

Just happened today after a full charge over night, I'll be dam..only 16,325 miles off to the dealership!

 

My car just bricked this morning after charging to 100%. Got the, check electric vehicle system alert. Tried to remove the positive battery post to clear error and it did not work. I called my dealer’s service center at 10 this morning and two additional follow ups, sent to service manager’s voicemail each time. They closed at 4pm and didn’t bother to even call me back. Really ticked off with the customer service and concerned about the car. Will update as I get news.

 

2019 Kona EV Ultimate owner here. 38k miles, purchased used (as a buyback title) from a dealership in March '22 with 31k miles. Mine had the battery recall, and either the battery replaced or cells replaced (hard to tell). Came back from a longer trip the other day and charged to full with my L2 charger. The next morning I had the CEVS error, but it appeared to be charged to 100%. After some driving/discharging, it appears to be capped at around 80% charge now and won't go beyond that, and the error obviously persists. I have a service appointment set up for 7/31, but already fear the worst. All of this after having a 2019 Volt with the dreaded BECM issue and Carvana buying it back because I was waiting too long for the repair, LOL.

 

So I got this for the second time the other day. The last time I brought it in they cleared the code and told me there was a software update forthcoming but not yet available. This time they apparently applied that – the notes say they found codes P1AA600 and B128577, and the tech line had them perform battery management system update event 901. I picked it up late so didn't have a chance to ask about what that entailed, but thought I'd report back here and see if anyone else has experienced the same or has any info about that procedure. In any case the car seems happy now for the moment at least.

 

I just dropped of my car yesterday to the dealership, they told me they will get back to me next week for an answer. I sure do hope so, but I am not really not quite ready to wait 1-2 months like others here did. I don't even know if they will gave me loaner car if it will take long time to fix the issue... this is in fact the third time i had this...

 

My 2020 Kona Electric Limited with 58,274 miles displayed the Check Electric Vehicle System (CEVS) dashboard warning on July 18, 2023. I purchased my Hyundai used CPO from a dealer in Southern California in January, and it still has the CPO warranty in effect until 60,000 miles. Like others in this CEVS thread, my gear options were park or neutral, but not reverse or drive. I replaced the 12v battery but there was no change in the CEVS dashboard warning or vehicle operation. Since there was no change, I returned the new 12v battery.

My local dealer in Roseville, California had no service appointments available for 3 months. Folsom and Elk Grove were similarly backed up. Stockton, 50 miles away, could take me the next day. I spoke to Hyundai customer care and they confirmed that Hyundai roadside assistance would tow my vehicle to a dealer within 30 miles. If I wanted it towed to Stockton I could pay the difference for the additional 20 miles. I decided to upgrade my AAA membership from basic (5 mile tow) to plus (100 mile tow) and waiting 10 days for the upgraded towing benefit to take effect.

On July 31, I had my vehicle towed by AAA to Stockton Hyundai on July 31. August 1, no update. On August 2 they asked me for and received my authorization to replace the 12v battery, and applied and road tested a battery management system update. My vehicle was fixed and ready for pickup later that day. While the vehicle was there they also flushed and replaced the inverter coolant (TSB 23-01-049H). I was also told by the service advisor that if the vehicle exhibits the same CEVS problem/diagnostic code, I should expect to need to replace the high voltage battery. Note the reference to TSB 21-01-006H in the paperwork notes below. The car has worked fine since.

Relevant TSB Links

• Coolant, https://www.hyundaikonaforum.com/attachments/23-01-049h-pdf.8388/
• BMS/HV Battery, https://www.tsbsearch.com/Hyundai/21-01-006H
• HV Battery replacement, https://www.tsbsearch.com/Hyundai/20-EE-001H-2 (referred to by 21-01-006H if HV battery replacement is needed)

Relevant Paperwork Notes

A CUSTOMER STATES THAT CHECK ELECTRICAL SYSTEM IN VEHICLE LIGHT IS ON AND VEHICLE WILL NOT GO INTO REVERSE OR DRIVE CHECK AND ADVISE
CAUSE:
100 CUSTOMER STATES THAT CHECK ELECTRICAL SYSTEM IN VEHICLE LIGHT IS ON AND VEHICLE WILL NOT GO INTO REVERSE OR DRIVE CHECK AND ADVISE 80380 W (N/C)
VERIFIED CUSTOMER CONCERN
CHECK VEHICLE VOLTAGE SYSTEM MESSAGE DISPLAYED ON CLUSTER
CONNECTED GDS AND RETRIEVED CODES
P1AA600 HYBRID/V BATTERY ABNORMAL PERFORMANCE DETECTION
P0AA700 HYBRID /EV BATTERY VOLTAGE ISOLATION SENSOR CIRCUIT
B111216 BATTER VOLTAGE LOW
C182C00 EVSE FAILURE
FOUND OLD CAMPAIGN PREVIOUSLY DONE TO VEHICLE THAT APPLIES TO DETECT DIAGNOSTIC CODE
TSB 21-01-006H
OPEN TECHLINE 2023080102114
CONTACTED TECHLINE
ADVISE TO RECOVER FREEZE FRAME DATA OF CODES P1AA600, P0AA700, AND CURRENT BMS DATA
UPON SECOND CONNECTION OF SCANNER CODE P0AA700 HAS SELF CLEAR AND DID NOT SHOW UP ON CODE SCAN, UNABLE TO RECOVER FREEZE FRAME FOR P0AA700
SUCCESSFULLY RECOVERED FREEZE FRAME OF PIAA600 AND CURRENT BMS DATA, TRANSFERRED TO TECHLINE VIA STUI
CONTACTED TECHLINE AGAIN
ADVISE TO PERFORMED REVISED BMS UPDATE
PERFORMED UPDATE FOR BMS
CLEAR CODES SET BY UPDATE
ROAD TEST VEHICLE
NO CODES ON ROAD TEST
CUSTOMER CONCERN REPAIRED

 

I had this problem while on a return road trip (Melbourne to Pt Douglas Australia) after charging to 100 per cent on a level 2. A Saturday morning, 100 kms from nearest dealer (and 2000 kms from home)which wasn’t open until Monday.Hyundai road service sent RAC Queensland who said couldn’t do anything and car would have to go on truck to dealer on Monday. Checked google, saw fix and called EACQ service man direct - he returned used diagnostic tool and error message disappeared. Continued trip without problem, charging to 80 percent on fast chargers. Reported problem to Hyundai Australia = response was if it happens again bring car to dealer.

 

A follow up, the car sat at my dealer for about ten days before they would even look at it after being towed in for service. Rep said aside from basic scheduled service they updated software and charged the twelve volt battery (which was operational when I sent them the car). Didn’t really give me an explanation though I did ask repeatedly. Simply said it’s fine now and drive it normally. I don’t know, I really like the car a lot but don’t really trust it like I used to, not sure I would be comfortable taking it on another 2000 mile road trip.

 

There has been many reports of this error in the last six months, all repaired with a software update. No clues as to what the root cause is. Hope they didn't drain your 12V and then just charge it up and hand it back. That is the only reason I resist having my Kona visit the dealer again.

 

Sorry for bumping an old thread here but as it's a similar issue I have been having on my 2019, recurring... Wanted to get some input here.
I have had 3 "EV!" / check electric vehicule system errors in less than a year. My Kona is past all warranties except the 160k/8 year one for the battery and charging components so I REALLY want to sort this out before I hit 160k. I got a battery replacement in 2021 (per Hyundai recall) and error occured on 3 different chargers (Hyundai Level1 and 2 different Level 2 home chargers)

1) summer last year conclusion was 12V battery replacement needed. Replaced (at my expense), code was cleared by dealer.
2) last fall, same error message. Conclusion : BMS update needed. DTC code cleared by dealer afterwards.
3) Taking in my car for a 3rd time now, same issue...

Both previous instances had the P1AA600 code only in DTC. Anyone has any idea what's going on? Dealer seems to think that "oh, this just happens you know... It's like a check engine on an ICE"

 

Better to bump an old thread than to start a new one because this way all the info on a topic is hopefully in the same place.

Do you trust your dealer's service department? That answer is totally unsatisfactory. Maybe Hyundai's ICE cars light up their Check Engine LEDs frequently, but none of my Hondas, beginning in 1986, ever did it once. Do you have another dealer reasonably close to you where you could get a second opinion?

 

There are two others within an hour or so radius from where I live. I'll see what they have to say this time around but will likely get a 2nd opinion at this stage. It sucks that there are not a lot of independent shops that service EVs where I live, I would gladly get a 2nd, non Hyundai opinion at this stage but I wouldn't even know where to look for a repair shop that can interpret / are knowledgeable enough about EVs to get a decent opinion.

 

So edit ; got a call from the dealership, they have reached out to Hyundai for a potential 2nd battery replacement. I don't have the details yet but what I understood is that given that the BMS update was done last year, there is no "further" BMS update to do and this is likely a legitimate problem with the battery ... In the meantime I also found the TSB associated with this issue (it's from USA but likely the same for other countries) https://static.nhtsa.gov/odi/tsbs/2023/MC-10244989-0001.pdf
Will update post/thread with resolution

 

Thanks for posting that TSB as it's the first time I've seen it. Included is a list of items the BMS is checking, especially during and after charging. Many of those can be checked using the Car Scanner app on a smartphone. It appears that the service tech has to figure out which is the problem and take the action indicated, most of which are to replace the entire battery pack.

It's seems inevitable that battery pack designs will evolve to being easier to repair by the dealer in-situ. Manufacturers can't continue to eat the cost of an entire pack every time one part of hundreds is out of spec.


* CV means constant voltage, I believe the latter part of charging curve, when approaching 100%.