I was traveling on the freeway when I got a warning saying “check electrical.”i started to pull over on the freeway and my car went into “turtle mode “and I made it off the offramp but almost got rear ended. I was half a mile from home so I limp home in a tow truck towed off. It was determined it is the ICCU.
2022 Hyundai Ioniq 5 fuel system complaints
Page 2 of 4: complaints 11 to 40 of 90, newest first, as owners wrote them.
My 2022 Ioniq5 left me stranded late at night in a freezing rainstorm in March of 2024 when I was 75 miles from home at it failed to charge both D/C fast charging and A/C level 2 charging, despite my trying several different chargers. The car gave me the dreaded "Check E/V System" warning when it failed to charge. It turned out to be the notorious ICCU but also the AC inverter, which had to be replaced. It took 12 days. The dealership's initial diagnosis was something draining the 12-volt battery, so I asked if they also replaced that. They said no because it had tested fine, but 9 days after I picked up the car, it did not start because it turned out the 12-volt battery was dead, and my dealership spent 2 days getting Hyundai to approve replacement of the 12-vold under warranty. Last month, 17 January 2026, my Ioniq5 again left me stranded. This time 120 miles from home in a snowstorm. It D/C charged for 10 minutes before the charging stopped and it gave me the dreaded “Check E/V System” warning. I tried two nearby Tesla Superchargers with my Hyundai issued adapter, and they both failed. I had just enough charge to make it to a dealership 110 miles from my home, where the vehicle stayed for nearly a month while they diagnosed and repaired it by replacing the AC inverter (note that had been replaced the last time) and also the AC compressor. The ICCU failures are well-known and well-documented, but the AC inverters that failed on me twice do not seem to be as common and should probably be investigated. In both cases I was stranded on Saturdays when no dealership service departments were open until the following Monday, so I had to pay for a motel overnight, which Hyundai refused to reimburse because I was not at least 150 miles from home.
Q: What component or system failed or malfunctioned, and is it available for inspection upon request? A: ICCU failed - Not available for inspection (at least at this time, but willing to try and make it work). Q: How was your safety or the safety of others put at risk? A: The ICCU (Integrated Charging Control Unit) is a safety-critical component subject to federal recalls 24V‑204 and 24V‑868. (My vehicle had all recalls performed prior to this failure.) The failure occurred while driving which was indicated by a “popping” sound. It is contextually important to note that the ICCU is responsible for charging the 12v battery, had the 12v battery failed during the duration of my drive I would have experienced a sudden loss of motive power. A sudden loss of motive power is an unacceptable risk to public safety. Q: Has the problem been reproduced or confirmed by a dealer or independent service center? A: Yes, the problem has been reproduced and confirmed to be an ICCU failure by an official Hyundai service center. Q: Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? A: No. Q: Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? A: Symptoms first appeared February 14, 2026. The first symptom of failure was the signature “pop” sound that the ICCU failure is known for. Only after my drive and upon attempting L1/L2 charging did my dash warning indicate “Check Electric Vehicle System.” I also checked for codes with my OBDII scanner, and it showed no codes.
The Dealer states my ICCU has failed and will be replaced. My vehicle could no longer charge on AC power (level 1 or level 2), and eventually had to be taken to the dealer because it could not be charged at home any longer due to the ICCU failing.
While driving on the highway during a rainstorm, the high voltage fuse on my car's Internal Charge Control Unit blew and the ICCU itself failed. This rendered the vehicle inoperable as soon as I managed to get it to the shoulder. It took two weeks to repair, and I had to argue with Hyundai's corporate lines for almost six months before the offered a partial reimbursement for their device failure.
While making the short drive to work on surface streets I was given a warning in an amber circle to check the electrical system. Moments later I was presented with a warning in a red circle reading "Stop vehicle and check power supply"; accompanying this warning was a drastic loss in power. Had I been on the highway I would not have been able to maintain speed with the likelihood of being stranded in an unsafe location. The dealership reported that the ICCU (internal charge control unit) had failed. This is the second such failure on this car. It has been over 4 weeks since the dealership received the car, and Hyundai has not been able to supply repair parts.
The Integrated Charging Control Unit (ICCU) has intermittent failures. During the last failure, my wife was on a busy freeway (Interstate 5 near Hwy 120 northbound) in heavy but fast moving traffic. She was driving in the #2 lane (of 4 lanes) when she experienced sudden loss of propulsion. The vehicle slowed to 5 MPH in traffic that was moving 70 to 80 MPH. She had to traverse through the #3 and #4 lanes to the narrow emergency shoulder. Cars were honking and flipping her off. In the emergency lane, the vehicle completely died after 30 to 60 seconds. She was at risk of being rear ended during the dangerous 5 MPH lane changes and in the time parked in the emergency lane. She could not start the car for 15 minutes, after which the system came back to life. She was then able to start it and continue home. The first time the ICCU failed was in a parking lot. This is a known defect with Hyundai which they have attempted to rectify with Recall Campaign 272. However, they refuse to replace the ICCU. After the first event, they replaced the battery after 22 months/32429 miles. Now they want to replace the battery again after another 20 months/34k miles. What they don't get, is that the batteries have not prematurely failed. Instead the ICCU has intermittently and temporarily drawn the batteries down causing the vehicle to lose propulsion and die. They refuse to replace the ICCU because an error code they were looking for was not in the memory. They have performed three software updates on three separate dealer visits, but the issue has not been resolved. During the last visit they kept my vehicle for six weeks while I appealed through Hyundai Consumer Affairs and the Service manager appealed through his Dealer rep. But the factory engineers held firm and would not approve the ICCU warranty replacement, and instead wanted me to pay for 12V battery replacement. We don't know if there were any warning lights since my wife was busy navigating the danger.
While driving vehicle it flashed warning to check battery and power was severely reduced, limited to about 25 mph. Battery and EV warning triangle appeared. Then within less then a minute it brought up additional warning to "Stop Vehicle and Check Power Supply" and power was further reduced to less than 10-15 mph. Car now also displayed turtle icon. After safely getting to parking spot vehicle began to shut off critical systems or displays intermittently before eventually fully shutting itself off.
After pre warming the car in the garage, I left for work. Three minutes into the drive I heard a single popping sound from the passenger side rear of the car. I then received an error on the dash "Stop Vehicle and check power supply". I them drove 4 more miles to work with the hazards on. Two hours later I attempted to drive it to the dealer and it stopped .5 miles away. Hyundai had it towed the rest of the way.
The ICCU component failed. I lost propulsion while driving and almost got rear ended. The dealership service department confirmed the ICCU issue. The dealership service department has inspected the vehicle. I had a dead 12v a month prior that I had asked the service department to look at and test the ICCU. They did not test the ICCU. The car warned me 30 seconds maybe less before i lost propulsion.
Iccu blew. Car cannot be charged
The component that malfunctioned is the Integrated Charge Control Unit (ICCU) and related high-voltage charging system in my 2022 Hyundai Ioniq 5. The ICCU controls AC (Level 2) charging, DC fast charging functions, and power delivery. The ICCU assembly and charging components were serviced and replaced by an authorized Hyundai dealer and are available for inspection through service records. This defect created a safety risk because the vehicle experienced complete charging failure and reduced-power operation. Loss of charging capability can leave drivers stranded, and reduced-power “turtle mode” conditions can limit acceleration and vehicle performance, creating hazards in traffic. The charge port has also not locked during charging, creating a potential risk of electrical arcing during DC fast charging. The failure was reproduced and confirmed by an authorized Hyundai dealer. In approximately January 2025 the vehicle would not charge and remained at the dealership for an extended period (about January through June 2025). After diagnosis and consultation with Hyundai technical support, the dealer replaced the ICCU assembly and high-voltage fuse. The vehicle and charging system have been inspected multiple times by Hyundai service centers. Hyundai issued recall campaigns in 2023 and 2024 involving ICCU software updates and fuse-related work, but these did not prevent the later failure requiring full ICCU replacement. Prior symptoms included abnormal charging behavior and eventual total loss of AC charging capability during the 2025 failure, making home charging impossible. After the ICCU replacement, the vehicle exhibited unusually loud cooling fan operation during Level 2 charging, documented by the dealer. There were also charging-port safety concerns. After one service visit, an important DC pin cover/cap was not properly installed until corrected on a return visit, leaving charging components exposed.
ICCU failed and my car will not charge. The dealer has diagnosed this issue. Parts are not available to fix this issue. The problem has been reported to the manufacturer but they have no expected delivery date for the needed parts. I was told it could be months.
This is an EV vehicle. This is a recurrent problem with the Ioniq 5 and is all over the internet. For me this is the 2nd electrical failure. The first time the accessory batter failed and the ICCU controller failed and had to be replaced. Now its at the shop for the 2nd time for the same failure. Not sure if its the ICCU again or not. In and of itself not a problem to send it off to fix, The major issue is how it fails. There is no warning, If you are on the highway going 70 mph it goes flat... no propulsion. This gives you no or little power to get to a secure spot. It then is only capable of about 20 mph. This is dangerous as hell. The first time it died completely and wouldn't move. For myself, i was lucky i was on a local road. I was driving. For my wife, who drives this car it would be harrowing. This is a recurring problem with this vehicle. A solution has not been found other than to swap parts. Hyundai need to be put on notice for a permanent fix.
Iccu failure unable to charge or drive
The ICCU on this vehicle has been replaced twice, 10/25 and 1/26. The failure of the unit on stopped any movement of the car,leaving me stranded on busy highways. I have had all software updates performed prior to these failures
My 2022 Hyundai Ioniq 5 has experienced two ICCU (Integrated Charging Control Unit) failures, both completely immobilizing the vehicle. •First failure: November 2024 •Second failure: December 31, 2025 (confirmed by dealer 1/13/26) •Downtime: Over 45 days total •All recall work and maintenance were performed at the same Hyundai dealer, under active warranty, but the recall did not prevent the second failure. Safety Risk: These ICCU failures cause sudden loss of propulsion, leaving the vehicle stranded and creating a serious safety hazard. The second failure after recall indicates the repair is inadequate. Luckily mine failed at home before departing for an errand, but I am gravely concerned about others not as fortunate or for myself should the issue recur while I am traveling on a public road. Examples of this are reported online in a variety of forums. Widespread Issue: Thousands of owners report similar ICCU failures, often after recall repairs, on forums and social media. There is also ongoing Canadian litigation addressing the same defect. Requested Action: •Investigate repeated ICCU failures in Hyundai/Kia EVs •Evaluate the adequacy of recall repairs •Require Hyundai to implement a permanent fix •Take appropriate safety action to protect vehicle owners
3rd ICCU failure. Was Driving and went into limp turtle mode. Was in a dangerous area for it to happen and took a while to get to a safe place.
Electric Drive System Inoperable, sustained an immediate failure upon engaging in Drive mode. Dashboard lit up with warning lights and messages. Luckily was just pulling out onto road when vehicle completely died. Tow service unable to start vehicle with jumper module. After being towed to dealer, was diagnosed with failed ICCU. The original ICCU was replaced previously in January 2025. Luckily was not underway on the road when it happened. There was no warning, no indication that there was any problem.
The Integrated Charging Control Unit (ICCU) failed - the car is no longer capable of driving due to the lack of ability to charge the battery. I was able to get it to the repair center. The ICCU on this model can fail in multiple ways, which includes the vehicle becoming inoperable at highway speeds. The issue first started 2025/11/13. I tried multiple charging units. It flipped the breaker on my home charger and caused issues for a public charger.
Even after the recall service performed, the ICCU still failed 10 months later. DTC P1E011C is listed and will not charge. This is the same issue for the KIA EV9 and a TSB needs to be issued the same as the TSB 339 KIA did for the EV9.
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!
The ICCU in the car failed. It immediately limited the speed of the vehicle to 25mph. There were no warnings, it happened all at once. I had to drive on the shoulder of the interstate to the next exit. Obviously, driving 25 on the shoulder while cars passed me at 65+ was not a safe situation.
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 federal safety agency 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)
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