2022 Hyundai Ioniq 5

Despite being up-to-date on recalls for this vehicle intended to address failures with the integrated charging control unit (ICCU), I still experienced an ICCU failure. I was driving along a surface road at approximately 40 mph for about 9 minutes when I heard a pop that sounded like cargo shifting in the rear cargo area. The vehicle then flashed a "Check EV System" warning but otherwise continued to operate normally. About 2 minutes later, there was a warning to stop vehicle and check power supply. After I pulled into a parking lot, I restarted the vehicle, but the errors persisted. I had the vehicle towed to the dealer, where it was diagnosed as an ICCU failure. The vehicle was last charged ~15 hours before the failure on a level 2 charger at a peak rate of 6 kw. The vehicle was driven for about an hour after charging, sat overnight, before being driven when the failure occurred. The vehicle is primarily charged using level 1 and 2 charging, typically not exceeding 6.3 kw. Only a handful of times has level 2 charging rates exceeded 6.3 kw. The vehicle previously had the ICCU fail and replaced in 2023. The car is still at the dealership with no repair timeline.

Battery conditioning (heating) is required for fast charging at cold temperatures. The current method of enabling this function takes many steps including going into the EV setting to enable this option (since it automatically turns off when changing some settings in the Hyundai Bluelink App), then opening the navigation screen, looking at a map and scrolling though a long list of charging sites, picking the desired charger then starting the navigation and route to that site. This has to be to done while in route to a specific charger, normally this would be on the freeway 20-40 minutes before arrival at a fast charging station. It is a distraction while driving and is an issue with all Ioniq 5's sold from 2022-2024. Hyundai fixed this problem for the 2025 model year but have not do so on the previous cars at this time. Hyundai needs to add this 1 touch preconditioning option for safety and driver ease of use. I feel it should required on all EVs that offer battery conditioning. I have told them about this several times and not gotten a response and according to posts in various online communities many other have also reported this issue to Hyundai but they have taken no action.

I was driving along and got a warning to pull over due to low power. This is the third time this has occurred and is a well--documented failure point for this vehicle. I go in for "repair", things are checked and sometimes software is updated and then within months the problem returns. Very unsafe being stranded on a high speed, two land rural road at night. It has been flat bedded to the dealer and tomorrow I will here theri song and dance.

On numerous occasions starting May 2024 and continuing through July 2025, my 2022 Hyundai Ioniq 5 displayed a “Check electric vehicle system” error upon starting the vehicle. In June 2024, Hyundai replaced the vehicle's VCM under warranty. In December 2024, the car wouldn't start. Hyundai replaced the 12v battery under warranty. In April 2025, the vehicle would not drive above 20 mph and warned of imminent shutdown while driving and Hyundai eventually replaced the ICCU under warranty. And in July 2025, Hyundai replaced the charging port under warranty. In all, the vehicle has been out service for 95 days while being repaired under warranty and most of those days I was not provided with a loaner vehicle. During the ICCU replacement, I was forced to rent a vehicle two separate times to get to work. Hyundai assured me that I would be reimbursed both for costs associated with the rental vehicles and the loss of use of my vehicle while under repairs, however despite multiple emails and conversations and having provided all requested documentation, I have received no reimbursement from Hyundai. Please assist me in obtaining reimbursement from Hyundai as soon as possible. Thank you!

On January 31, 2025, my 2022 Hyundai Ioniq 5 experienced a failure with its ICCU resulting in the vehicle to lose all power and become unable to be turned on exposing myself and others to conditions where the vehicle could become a serious safety hazard due to its complete lack of power. This occurred despite the application of the NHTSA Hyundai Recall 272 only two weeks prior to this incident which was supposed to prevent this serious safety defect from occurring. The vehicle's 12 V battery was subsequently replaced allowing the vehicle to display a "Check electric vehicle system" warning. The dealership has since confirmed this as the ICCU defect. No warnings or other messages preceded this incident.

Hyundai Ioniq EV's have a continuing issue with a component called that "ICCU". The ICCU and high voltage fuse failed even after two recalls meant to monitor that problem and update the software. Luckily, mine failed in my driveway at home which did not put me in immediate risk. However, many people have this part fail while driving on roads and highways with zero warning. There have been two ICCU-related recalls that my car has had. When I started my vehicle I heard a "pop" and then the dashboard said "Check vehicle electrical system" and then shows the "limp mode" icon allowing to drive the vehicle at a slow speed to safety.

ICCU and High Voltage Fuse blew suddenly and without warning on a 50 mph poorly lit road before sunrise. Vehicle immediately entered limp mode in traffic. Car could not make it safely back home before losing all power in the middle of the road (no warning was given that limp mode was about to fail it just stopped with all screens still on).The dead 12v battery (which the ICCU failed to recharge) made the car completely immobile once it turned off even for towing purposes. Put my safety as a driver and those on the road with me at risk with the vehicle drastically slowing down in the middle of travel with no way for others to pass me. Problem confirmed as the ICCU failure by dealer after finally restoring enough power to get the vehicle in neutral to be towed. The pending recall on this Vin is only pending because it is still sitting waiting for the replacement part a month later. no ETA on a resolution as Hyundai has stopped responding to requests for any information on timelines other than "eventually it will be replaced". All previous recalls for this problem were completed but were only software updates to "potential lower chances of occurrence". Issue is a very known Hardware issue and is very well documented online and local dealers are extremely familiar with it, but Hyundais solution is only to check if the part has already failed and a software update that does not fully prevent the failure in the future. Issue still occurred. no prior warning or behaviors were given

On [XXX] I was preparing to leave for work in the morning. I unplugged my Ioniq 5 from the home charger, entered the car, and started the vehicle. Immediately, the panel warning system stated “Check Electrical System.” Because I am familiar with the warnings that have been displayed related to ICCU failure, I called the dealership to schedule a service appointment (set for February 18, the following Tuesday). I drove the car to work for a meeting, then restarted the vehicle following the meeting and the same message appeared on the screen. I then drove the vehicle directly to Werner Hyundai Service Department in Tallahassee, Florida and left it for diagnostics. On February 14, 2025, my service advisor called to advise that the ICCU and the VCMS had failed and required replacement. I was then advised that I would be placed on a waiting list for an ICCU part that was expected to be released nationwide on March 1, 2025. As of today’s date, March 8th, I have not been made aware of an ICCU part availability (apparently the VCMS has arrived at the dealership and is being held pending the receipt of an ICCU) nor an anticipated repair of my vehicle, it remains at the dealership service department pending parts availability. My husband unplugged our home charger that uses a 220 volt plug and noted that the plug showed melting damage and that the plug and wall had black marks that suggest that the car caused a malfunction that resulted in a spark in our garage. Due to the location of the outlet, the spark did not cause a fire. Since that date, every time our HVAC system comes on at home, our lights flash, this did not happen prior to [XXX]. We are contacting an electrician to inspect the outlet and any affect the surge had on our home electrical panel. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Was pulling out of drive way. Loud pop heard in the car. Immediately car flashed warning telling me electrical system had an issue and I needed to pull over and have the car towed to a dealer for service. Was told the part was related to the iccu and would take a couple days to arrive. Part is now on back order. 3 weeks later I am still waiting with little to no update on timeline for repair.