We have not yet had our 2022 Ioniq 5 in for the recent recall. So far no 12V battery issues or charging issues in two years of ownership.

 

No problems in over 2 years of ownership. I haven't had the ICCU work done. (I don't trust dealer competence.)

I've done only about 4 partial charges using DC fast charge. All the other charging is level 2 at home, on a dedicated 20 amp circuit, maxing out at 4.5 kW. Perhaps that is gentle on the ICCU.

 

'23 Ioniq 5 Ltd, 11.5K miles, had the ICCU service campaign performed 10/4/23. Have not had any issues battery yet (knock on wood). Have mostly charged L2, but have done a number DC fast on road trips.

 

How in the world can a person know yet?

I haven’t read that anyone outside of Hyundai has figured out things that trigger the failure so at best guess they are random. Nobody has had the most recent “fix” long enough that random failures will have shown up yet.

For what it’s worth, I haven’t had the ICCU failure yet with over two years of driving and over 36k miles. I will have the latest fix performed today. I don’t expect to have anything indicate to me that it will absolutely, positively assure my ICCU will never fail. Only time will tell.

 

Yes, I was setting this up SO THAT WE CAN RESPOND TO IT IN TIME. I have no expectation that any of us will know YET.

 

I had my update last Thursday and at the risk of tempting fate I have never had any problems in the 18 months I've had the car

 

Mine is scheduled to have the recall work done on 3/30. I did not bother to get the ICCU service campaign work done.

 

23’ SEL AWD, all software updates have been done, April 1st going in for recall, DC fast charged maybe 3 times, level 2 charge at home on a 50 amp dedicated circuit (Emporia) at about 9.5 kWh, never have had any issues.

 

our car is going in next week tuesday. however, last week monday, i installed an ohmmu. i also installed the bm2 that has been on the car for several months. the difference with ohmmu is amazing. the fact bat display can only be described as erratic. the ohmmu is the opposite, completely stable. with the fb, discharge/charge would up up to about 15v, and down to 12v, maybe 10-15x per hour. then, a stable, straight line for a couple hours, then back erratic. ohmmu is just a straight line, and when the car is driven, it will discharge mayby .5v, and then charge about the same, but only once. when the car is sitting, there is only a couple of very small spikes, compared to the fb where there are dozens. i think the iccu is killing itself with all the erratic discharge/charge. just for grins, i reinstalled the fb today, and yup. all the erratic behavior is right back. i bet those who also replaced the fb with agm or similar would see the same results, if they also had bm2. if so, then the factory techs need a window in their stomach to see out, because they have their craniums up their rectums.

 

Just had my appointment at the Hyundai dealer. Accordingly, they found no issues with my ICCP and just did the software update. No way to tell if there was a problem, nor if the problem was fixed other than their say so. (I never experienced the overheating issue while charging.) Howver, the 12V battery charger light in the front was on and is still on - possibly the most annoying thing about this car.

 

My car 2022 had the failure - wouldn't go into gear, flashing warning on 12V battery drained. I had it towed in - they didn't find an issue but did the update. Then yesterday, one week after getting it back, same thing happened. I'm super frustrated. Clearly the update did not work.

 

Same story here. Been waiting since June to get it fixed and still not resolved.

 

Simple answer... I don't know. I had the recall update done at the end of March but I never had the initial problem.

David

 

After one year of ownership 10,000 miles, I let my son use my car while I was away for two weeks. I had never had charging problems although it only charged to 201-206 miles whereas it was more when I first got the car. Because he was going to have trouble finding chargers, I charged it to 100% instead of the usual 80%. Several days later he got the charging notice and had to have the car towed into Hyundai [His wife wasn’t thanking me]. They replaced the part and it is now seemng to be fine, and the 80% charges are higher and lasting longer. Knock on wood. In two weeks I am due to take a four hour trip to a small town and have my fingers crossed that they really completely fixed the entire problem. I really liked the car except for the lack of rear windshield wiper until this happened. Now I am afraid.

 

We had our Ionic 2022 serviced in the dealership for the recall - March 24. The next day the car stopped without warning, stranded on the side of the road, towed to dealership. A week later parts are in to replace 12v battery. Told it would cost is $300 for the new battery, surely this is under warranty or at the cost of Hyundai???

 

Can anyone with the second ICCU update see if SoH is still visible in Car Scanner? Seems to be gone for me along with a lot of other info

 

I had the ICCU updates applied and it is still visible for me in Car Scanner under Android using a Vgate iCar Pro OBD2.

It looks like the quick / standard charge stats have been reset though.

 

Number of charges is also zero for me. But it has to be more than just reset? You've probably charged your car after the update?

Can you please show me a screenshot of the settings page?

 

This is from settings on main screen. Let me know if you need anything else. I am not an experienced user of Car Scanner. I occasionally use the dongle on long trips.

As for the charging stats., I agree with you that it could be more than a reset. My update was only a week ago and I do not think I have charged my car since. I will put the car on charge tonight and see whether it is reported or not. Still having the history of charging would be useful and it must still be recorded by the car for diagnostic purposes. Perhaps a new profile for Car Scanner is needed?

 

My suggestion to,a new profile. Yeah, please do report if it records your NJ ext charging

 

Solved. Had to charge to 100% one time first before it showed.

 

It worked for me too after charging, not to 100%. But 1 standard charge registered. Do you see previous sessions?

 

The recall made it to Australia a month or so ago. I had it done a week and a half ago, even though I'd had no problems. (I rarely use DC charging and the ones on our island aren't really superfast, so the battery never overheats.) 12V battery failed a week later; discovered just after a 45 min drive! It may be just a coincidence. There is no additional load on the battery, other than a trivial bit from the ODBC dongle. Car jump starts OK and ODBC voltage reading on battery shows it's charging. Then dead within a couple of hours. Must be coincidence. Our dealer is to look at it soon. Still under warranty fortunately.

 

The recall made it to Australia a month or so ago. I had it done a week and a half ago, even though I'd had no problems. (I rarely use DC charging and the ones on our island aren't really superfast, so the battery never overheats.) 12V battery failed a week later; discovered just after a 45 min drive! It may be just a coincidence.

Most likely failed because your dealer did not support the 12v battery while working on the car. This means the 12v was overloaded and drained. Thereafter it will not hold a full charge.

 

For the longest time we didn't have any trouble but did have a handful of incidents (4 or 5) where the car was dead before we took it to the dealer for the recall. That was a little over a month ago: we've now had 3 dead battery instances SINCE the recall. So...no: the recall did not fix our vehicle. Found this forum looking for answers..

 

Has the 12v battery been replaced?

Once lead-acid batteries fail they pretty much stay failed. So even if the 12v battery was damaged by a ICCU problem, fixing the ICCU will not magically make the 12v battery undamaged.

 

NO - THE RECALL UPDATE DIDN'T WORK. Purchased my 2023 I5 13-months ago. 8K miles. I had the recall service/updates done in Fall 2023 and then again in April 2024. Yesterday I got the dreaded alarm and warning to STOP and check power supply. The car limped a bit further til I could get to a safe place. Towed to dealer and told it is the ICCU and fuse.

 

Love(d) my ioniq5. But today, after about 2.5 years of an unblemished record, the 12v alert came up on the dash and then the car slowed to 35 km/h on a major highway in peak hour traffic! The alert said I had to pull over safely which I eventually did. Car started again but soon dropped to 35 km/h then I limped to a spot to park it. By the time the tow truck arrived it had no power at all. Our last service (a few months ago) supposedly included the recall update for this issue.

 

I rushed to the dealership to get the promised fix. Two weeks later, I had the 'dead 12V battery' syndrome.

you can ignore below
Background: Last year, I gave up on HMUSA having a clue, and filed under the state's lemon law.
Status: I've 'won.' HMUSA was ordered to 'fix within 60 days.' My car sat in the dealer's parking lot with no repair happening. Lemon Law here sucks. HMUSA can and does ignore the state's orders.

 

Just has my ICCU recall completed, and an hour later got the 12V battery warning again. 😑

Losing faith of any resolution here.

 

They probably did not support the 12v battery while doing the ICCU work so drained it. It will likely need replacing now…...

 

Our now-two-year-old Ioniq5 Ltd has recalls due for charging port and ICCU. We’ve had no problems with the 12v, and our home EVSE outputs a maximum 32amps so no charge port overheating. I’m very hesitant to have the recalls actually performed given (1) our complete lack of issues, and (2) posts in this and other forums about problems AFTER.

Are there any reasons to have these recalls actually performed?