Long thread on the Ioniq forums here may be of use?
It's just popped up on my 3 year old Ioniq

Coolant Warning

Just started my car and as I drove off got a yellow icon taking up the whole instrument display saying "refill coolant". Couldn't dismiss it from the display, would reappear after a few seconds. Car was serviced 5000 miles ago so should be in good condition. A few minutes down the road I...

www.ioniqforum.com

 

I saw this last night forthe first time. A quick google suggests it might be down to residue in the coolant interfereing with the sensor. My coolant tank is full, and after a power cycle the warning went away and didn't come back.

The car is going in for its 70k service on friday and when booking they mentioned a coolant flush recall but I dont know if its inverter coolant or battery.

Will see what they say.

 

There's only one coolant afaik, for battery/motor/inverter/climate
My warning has gone away for now, but fully expect it back.

 

Thanks. It will be interesting to hear what they have to say about changing coolant now and again in three months then.

Having said that I'm sure they'll just do the recall and then make me pay for it all at 80k miles.

 

Make sure you get a receipt for the work carried out even if free of charge then politely in 3 months decline the coolant change

 

Visit ioniqforum.com go to Ioniq 2017-2022 section, thread called Coolant Warning. It's long, suggest start at end to get latest info, then work back!

 

Thanks, I've had a read of it already.

 

Adam, have you found a service fix for this? I also have a 2020 Kona EV Limited, here in the states, with the same issue. My dealer doesn’t know what the fix is and has not offered to fix it.

 

There's a long thread about this here, Ioniq 38 is pretty-well identical to Kona 39. Includes pics of the special kit H supply to do the job properly. Coolant Warning

 

Just following up: I did NOT have the coolant flushed as anticipated, as they had ordered the coolant based on previous such orders, but it’s order number has been changed and they didn’t realize that. So no coolant was on hand. They didn’t tell me that when I arrived; not until I was picking it up after have the 30,000 mile checkup. So, now they have it, but they require the car for a full day so I’m waiting until a loaner car comes back and I can use that. To be continued!

 

TSB now issued, see attached PDF, all 27 pages of it. The date format is month/day/year.
EDIT: as a note, it seems this TSB is specific to Hyundai Motor America.

 

TSB now issued, see attached PDF, all 27 pages of it. I'm pretty sure the date format is month/day/year.

According to page 3 of the TSB only non heat pump Kona's are affected, very strange.

 

That is odd and it's not mentioned on page 2

or page 6 where the Kona section starts.

I tried to find evidence that it's a mistake and the only clue was this in the Kona's "B" section. It may be just boilerplate text about the refill amount but the HP version would have slightly more coolant because of one extra heat exchanger, a 2-way valve and some piping. Also the battery coolant heater normally accompanies that option and adds some volume.

There's never been any indication that the HP models already use the BSC-2 coolant.

 

BSC-2 is a recent invention. Only explanation I can suggest is maybe the Konas of that era never had heat-pumps fitted? But I can't believe that! Kona 39 virtually identical to Ioniq 38. I think H have screwed up a bit!

 

The engine bay images for the Kona are in fact an Ioniq, so yes Hyundai have released a confusing TSB. My 2020 Kona 64 has a heat pump, and they did do the recall at it's 3rd service in May this year, but dashcam footage suggest they just did some tests, and not a total coolant flush. It will be interesting to see what they do at the 4th service.

 

I change the coolant at the dealer last week conform to TBS. The error disappear. They use bsc-2 now. According to pictures what they send me, they flush the system. In one picture I see the old fluid become contaminated with some solid parts.

 

Yup that pic of solid parts shows the crystallisation that's taking place with the old BSC-1. Question is, did the gge use the special new Hyundai kit to do the flushing with? There's a complicated sequence of valves etc that have to be operated in a special order, it all takes a few hours to do properly. If they did not use the new kit, there's every chance the old crystallisation rubbish is still inside the battery/pipes etc.

To understand the full history of what's happened, you need to read this thread. Similar-looking forum to this one, but far more detailed & specific. It's a long thread, you may want to jump to the end & read backwards!

There are some pics i it of the special kit, you may want to print these off & take them to your gge, and ask them to prove to you that they have this. I suspect it's going to be rather hard to do the flushing properly without this; if it was easy, Hyundai wouldn't have had to design & make this item!

Coolant Warning

 

Yes, they use the special device for flush and cleaning. It's take few hours, from 08.00 to 16.00.