Charged up at EA - had to tow Kona

I had that same error once. I disconnected the 12V battery, reconnected it and the car acted as if nothing ever happened. No error codes, nothing. And it never happened again either. Mine happened after I fully charged at a public level 2 charger.

 

Which lower panel?

 

Hmm, maybe I should check mine.
Just in case.

 

I think it is definitely related to the BMS update. You are not alone, because about hundred Koreans with the Kona EV (as well as a few members here in this board; not to mention Indians) had their vehicles going brick.

I skipped the recall I scheduled. I have to make a weighted trade-off decision in deciding whether I am more scared of my EV catching fire/exploding versus dying on me in an area very far from any Hyundai dealership. I decided reliability is more important than the chance of a fire. I don't charge more than 80%; and having the vehicle dying on me in the middle of night when I am trying to get home from a 2 hour drive at work is definitely not worth the supposedly assurance of the car not catching fire.

The problem with the BMS update may be it is TOO cautious in detecting cell deviation. The parameters for its logic may be TOO tight, before it shuts the car down entirely. Even say the BMS detected a problem with your current main traction battery. Hyundai replace your battery with a new one. Batteries will degrade over time. The BMS can eventually shut the car again if the new battery's deviation does no longer meets its specification. Will Hyundai replace your battery again??? How long will the new battery last before it runs into the same problem?

If this is a rare, one-off incident, then I will probably do the recall. But I can count 5-6 members just on this board alone that are having this problem. So the problem is more widespread than it seems. I will keep the care for a few years before trading in for a new EV later on. I also have doubts in Hyundai's engineers, and their service technicians as well. I have not had any current problems with the car; will only charge to 80%; and really have no desire of letting them screw up my car so they can cover their liability; while I am left worrying if I can drive my car without it bricking on me without notice and have me stranded.

 

My issue was way before the bms updates. I heard of a couple of these occurrences around the time mine happened. I don't think that it necessarily has to do with the bms update.

 

Yes, that is recall #199 brake related software update. Some people here had it applied already, I'm still due for it waiting for an appointment.

 

I feel your pain.

 

It must be annoying, indeed. Hyundai should somehow compensate the inconveniences to the affected customers. However, when it comes to the volume in the ICE cabin, it is more a question of the sound characteristics than its physical intensity, because according to tests, Kona electric belongs to rather moderate soundproofed vehicles - 66dB at 100kph. There is no engine noise, of course, but tire and air noise are predominant. Somewhere there is a topic about additional silencing, especially the rear part of the body.

 

Did they happen to tell you what the code was? I'm assuming the HV battery isn't bad then?

 

As I mentioned on the thread for 199 I've heard of around 9 in NZ. The software must have a hair trigger....

 

When you get a new battery, given they're the batteries without the potential fire issue, I believe the BMS for those doesn't have the check.