complaints.title

I received a warning on the screen that said "Stop vehicle and check power supply". Later I got a different message about the 12V system. I checked the error codes with an android app and got error co…

The contact owns a 2024 Hyundai Ioniq 5. The contact stated while driving at an undisclosed speed, the vehicle stalled and failed to return to normal operation. The "check the battery" message was dis…

I was driving and the vehicle was operating as expected in normal conditions when I heard a loud pop sound, followed by an alert on my car infotainment to pull over and inspect the 12v battery. "12 vo…

There was a failure of the ICCU (Integrated Charging Control Unit) on my Ioniq 5 that forced me to pull off the highway after my car was no longer able to accelerate past 40 or so MPH. After I pulled …

As I began a drive cycle, I heard a pop sound and received the “check electric vehicle system” warning associated with ICCU failure. With ICCU failure, if I had continued to drive the 12V battery …

This is the second time the ICCU failed. The car is waiting for a full EV battery replacement. The first time the failure happened on 12/11/25, at 9,165 miles, the alert happened just before the car c…

Known ICCU issue: the 12v battery died for no reason rendering the car undrivable.

The issue involved a failure of the 12V battery system in my Hyundai Ioniq 5, which powers essential electronics and allows the vehicle to operate. The battery suddenly lost charge while I was driving…

For the second time, the integrated control unit, ICCU, has failed to this is AFTER being replaced under the recall. The recall solution has not fixed the problem, and is a fake bandaid on a problem t…

On [XXX], my 2024 Hyundai Ioniq 5 experienced a sudden and complete failure of the Integrated Charging Control Unit (ICCU). The failure rendered the vehicle inoperable without warning, requiring it to…

My on Thursday, April 2, my 2024 Hyunda Ioniq 5 displayed the "Check Electrical System" message displayed. I had just started the car. I started to lose propulsion on a busy street [XXX] ). I manage…

Based on all symptoms - loud pop followed by limp mode and electrical warning, and inability to charge -- iccu is busted.

ICCU failure. Common problem but Hyundai seems to have no fix despite it happening for years now.

I was driving at 25 mph when I heard a loud pop come from the rear of the car and subsequent warning message came up on the dashboard - "STOP VEHICLE AND CHECK POWER SUPPLY". In an electric vehicle th…

I was driving in a parking lot and heard a “pop” sound like a balloon breaking. The Ionic 5 lurched and stopped. A red circle appeared on the dash and said “check electrical system.” I slowly…

On 3/19/2026. Battery was at 20% SOC. Plugged in my home L2 charger. Car did not start. Took vehicle to dealer the next morning 3/20/2026. It was diagnosed as an ICCU failure. Parts ordered car left…

The vehicle experienced a sudden failure of the 12V battery while on the road. The car stopped completely and became inoperable. At the time of failure, there were no tail lights or proper warning ind…

While driving I received the infamous "Stop vehicle and check power supply" warning, and it was then inoperable, needed a tow to the dealer for ICCU replacement. I can't believe you terminated your i…

ICCU and its fuse blew randomly while reversing out of a parking spot. A warning light appeared on the dashboard saying "check electric vehicle system" after a loud pop noise came from the rear passen…

I was merging onto the highway. I got a warning that I needed to check my electrical system. I was able to back down the highway ramp and park on a side street. Within 20 minutes the car was fully dea…