Hyundai ICCU (Integrated Charging Control Unit) Issues

[jmillet]

Consumer Reports article outlines in detail the problems Ioniq 6 owners like me as well as Ionic 5, Kia and Genisis owners have experienced with the integrated charging control unit (ICCU). https://www.consumerreports.org/car...dai-ioniq-kia-iccu-failure-tesla-a3038878758/

 

[dogememe]

Have you personally had this issue? I personally have had multiple customers at the parts store come in with Ioniq 5s asking for the 12V battery to be tested. So far they've always tested good. When the battery tests good, I ask people what led them to come in and/or what the problem they are having with the vehicle is. Usually they tell me the car has a 12V battery error on the display or it's just acting weird.

I don't start going on about how these ICCUs are an issue, I just tell them kindly that they should take it to the dealership because I've heard there may be software updates available. Ultimately my hope is that they can have the issue addressed before the car leaves them stranded. But I don't want to scare them or make them think they have a bad car.

 

[jghall00]

I took the EGMP vehicles off of my list due to the ICCU issues. My understanding is that a new hardware revision was recently released, so I guess I'll give it another year to see if the problem is resolved.

 

[UncleDave]

EGMP has 3 achilles heels.

1. Single channel cooling results in inability to keep the cabin cool and sustain Max DC fast charging in hot weather.

2. ICCU failures. If HK could address them quickly and had stock this wouldnt be as big an issue, but they seem to have a problem here.

3. 400V network charge performance.

 

[jmillet]

Have you personally had this issue? I personally have had multiple customers at the parts store come in with Ioniq 5s asking for the 12V battery to be tested. So far they've always tested good. When the battery tests good, I ask people what led them to come in and/or what the problem they are having with the vehicle is. Usually they tell me the car has a 12V battery error on the display or it's just acting weird.

I don't start going on about how these ICCUs are an issue, I just tell them kindly that they should take it to the dealership because I've heard there may be software updates available. Ultimately my hope is that they can have the issue addressed before the car leaves them stranded. But I don't want to scare them or make them think they have a bad car.

Yes, my ICCU failed in November 2024 and fortunately it was replaced in seven days. All recall software updates have been applied and I charge exclusively with the OE 110V Level I charger set to 12amps. Slow but adequate for my needs. I also installed a Quicklynks BM2 12V battery monitor which I can check via my smartphone. After almost three years so far so good. Fingers crossed

 

[dogememe]

Yes, my ICCU failed in November 2024 and fortunately it was replaced in seven days. All recall software updates have been applied and I charge exclusively with the OE 110V Level I charger set to 12amps. Slow but adequate for my needs. I also installed a Quicklynks BM2 12V battery monitor which I can check via my smartphone. After almost three years so far so good. Fingers crossed

The early GM Ultium software issues that required dealers to install updates to resolve pretty major vehicle issues (some Ultium updates can be done OTA and some can't) and the Hyundai ICCU issues just goes to show that correct implementation of OTA updates that can update ALL modules of the vehicle is beneficial for automakers. Sadly only Tesla and Rivian have this. Obviously a software update can't fix a hardware issues but given that the software updates are a part of the solution, they need to prioritize this.

Heck, Tom of the very popular State of Charge YouTube channel just had his Equinox EV die on him in the middle of the street... due to a software issue. Obviously it's a known issue per the TSB referenced in the warranty repair work order, but this update should have been pushed to ALL affected vehicles by now. That's not good publicity.