My 2022 Hyundai Ioniq 5 has experienced numerous 12V battery failures since early 2024. I ended up having to replace the 12v battery five separate times. The car fails to start with no warning. It has stranded me while transporting a pregnant spouse and a sick infant. Each failure required a tow and service visit. Hyundai claims “battery case corrosion” is to blame, but this is clearly a systemic electrical defect affecting many owners. This is a critical safety issue for families relying on the vehicle in emergencies. This is a safety and accountability issue affecting many families.
2022 Hyundai Ioniq 5 electrical complaints
Page 5 of 11: complaints 101 to 130 of 307, newest first, as owners wrote them.
15 miles south of Crescent City California, "Check EV system" warning displayed, and power immediately tapered to a crawl in 30 seconds or so. No earlier warnings appeared. Car was towed to Northwoods Hyundai in Eureka where the problem was identified as ICCU failure. No parts appear to be available, and car has been sitting in the elements now for over 6 weeks, 300 miles from home. No repair date has been indicated, and the new ICCU is still back ordered.
Driving on the highway/freeway, received an error message on dashboard "stop vehicle and check power supply". The car slowed down, max speed around 45 but thankfully my hazard lights still worked and I exited the next exit. I've heard I was lucky as some people with the same problem - the car goes into "limp" mode and slows down to 5mph or stops completely. Very unsafe on a highway for everyone. Dealer has checked the vehicle and states it's an ICCU problem
Recall 272 was addressed on Dec 31, 2024. ICCU and fuse replaced; software updated. On 4/26/2025, 'Low voltage on the 12 volt battery, stop safely’ warned came on when I tried to start the car. The car was used several times earlier in the day and is used daily (i.e., does not sit idle). No other warnings were noticed prior to this failure.
The contact owns a 2022 Hyundai Ioniq 5. The contact stated while driving approximately 25 MPH, the vehicle lost power with the message 12-Volt battery low. The vehicle was towed to the dealer and was repaired under the federal safety agency Campaign Number: 24V868000 (Electrical System) and 24V204000 (Electrical System). The contact stated that approximately three weeks later while the vehicle was parked, the message 12-Volt battery low was displayed on the instrument panel. The dealer was contacted, and an appointment was scheduled three weeks in advance. After driving the vehicle to the residence and the vehicle was parked, the vehicle failed to start. The battery was recharged for 15 minutes, and the vehicle was able to start. The vehicle was towed to the dealer; however, the vehicle was not repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was 4,000.
ICCU failure resulting in inability to charge or drive. Thankfully, occurred while pulling into driveway as there were no previous warnings and app still indicated that “all systems normal”.
ICCU failure. Fortunately only 1-1/2 miles from home. Car towed to dealer.
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
My car is an EV. I was charging the vehicle and it quit. I had just enough charge to limp to the dealership where it was diagnosed with ICCU failure. According to you records my car is not under a recall but the part failed. Glad I wasn't on the road. So my car has sat at the dealership since February 24th. Hyundai doesn't seem concerned about getting the parts to the dealership. This is why they can't give me an ETA: "Please note that part orders can take several days or even weeks to arrive depending on the availability and supply chain logistics, as outlined in Hyundai's policies." So they are still turning out Ioniqs but can't be bothered to make sure cars with an ICCU failure are safe and can drive. I can't sell my car and I am stuck. I also believe the 1% you say are effected by this problem is much higher.
My 2022 Ioniq 5 had an ICCU failure in March 2025. It has been with the dealership for 10 days. It does not charge on 220 v AC L2 charger. It does charge on public DC fast chargers but at approximately 120 KWH not 350 KWH. There are no error codes on the dash, however the ChargePoint charger trips with a GFCI fault. GFCI fault in a high voltage system could pose a serious safety issue. ChargePoint (the L2 charger manufacturer) support checked, and said they see a GFCI fault when my car is plugged in. To make sure it is not a charger error, I had another car, a Kia EV6 plugged in to the same ChargePoint charger, and it charged normally.
Instrument panel on car will not turn on when car is started. Thus, all advanced cruise control and safety systems do not function. Car has not been to the dealership for repair yet. There were no warnings or any other indication that there was an impending problem.
Plugged the car into an L2 AC charger like I have for nearly 2 years, the car tripped a breaker in my electrical panel and after restoring power to the charger, the car would no longer initiate a charge on L2 power. Confirmed this by attempting to charge at a public L2 charger, same result. Took the car to Hyundai and they confirmed the ICCU needs to be replaced and it's a wait of up to 8 weeks.
Vehicle Information: Year/Make/Model: 2022 Hyundai Ioniq 5 SE AWD VIN: [XXX] Mileage at issue onset: ~18,000–22,000 miles Purchase date: April 2022 Ownership type: Purchased new, paid in full Component Affected: Electrical System → Integrated Charging Control Unit (ICCU) / Charging System Problem Description: I am reporting a persistent and unresolved charging system failure involving the ICCU (Integrated Charging Control Unit) in my 2022 Hyundai Ioniq 5. This defect has rendered the vehicle unreliable and currently inoperable, leaving me without safe transportation for myself and my infant child. Over the past year, I’ve brought the vehicle to the dealership more than 10 times, including 6 visits in just the last 3 months, due to charging issues that were supposed to be addressed via multiple recall campaigns (e.g., Campaigns 228, 997, 9A1, 9B5, 272, TCP). Despite these attempted software and firmware updates, the issue persists and culminated in a total failure to charge in March 2025. The dealership confirmed ICCU failure again, but advised that the part is on indefinite backorder, with no timeline for repair or safe operation. This defect is dangerous, particularly as it can result in loss of power and stranding, with potential risks to driver and passenger safety. Hyundai is aware of this widespread issue among Ioniq 5 owners but has not issued a permanent fix or offered viable alternatives to affected consumers. Hyundai denied my Lemon Law claim despite substantial repair documentation and admitted ICCU defects. I have filed with the BBB Auto Line and IL Attorney General. I’m now preparing for legal action. This is not just a consumer issue — it’s a national electric vehicle safety issue involving Hyundai’s inability to resolve a known, system-wide defect in a core safety component. Attachments: Available upon request: repair invoices, dealer assessments, Hyundai’s denial letter, lemon law filings. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Instrument cluster screen continuously resets itself while driving. Speedometer and safety warnings not available.
Turned on vehicle, immediately received "Check Electric Vehicle System" message. Drove ~1 mile back from coffee shop to work parking. Halfway to work parking, message updated to safely pull over and stop vehicle while at stoplight. Turned vehicle off during red light and turned vehicle back on during green light. "Check Electric Vehicle System" immediately displayed. Park at work parking. ~1 hour later, move car from work parking to guest parking to be towed to dealership, "Check Electric Vehicle System" still displayed. Dealership later confirms ICCU fault.
I am filing this complaint to report a serious safety defect involving my 2022 Hyundai Ioniq 5. The vehicle experienced a sudden failure of the Integrated Charging Control Unit (ICCU), which caused the car to completely shut down and lose power while in motion. My family member, who was driving at the time, stated that the car lost power and shut off without warning on the road, creating an extremely dangerous situation. Thankfully, they were able to pull over without incident, but this type of malfunction could easily result in a collision, injury, or worse. I later discovered that this issue is part of a widespread ICCU failure affecting Hyundai Ioniq 5 and other Hyundai/Kia EVs. My vehicle has been at the dealership for over a month, and Hyundai has informed me that the part required to repair the vehicle is backordered for 2–3 months, leaving me without my primary mode of transportation. This issue is not only a reliability concern but a serious safety hazard that warrants immediate investigation and intervention. A vehicle that completely loses power while driving is unacceptable, especially for a relatively new vehicle under warranty. I urge the federal safety agency to investigate the ICCU failures in Hyundai Ioniq 5 vehicles and determine whether a broader mandatory recall is needed due to the loss of motive power and serious safety risk. Many owners are affected, and delays in repair parts are putting consumers in unsafe situations.
ICCU failed during driving causing car to come to a halt on a busy road quickly, thankfully enough time to drive to side of road. Car had been in dealer for ICCU software update/recall 2 weeks before hand. Whatever the current fix is for the ICCU is clearly incomplete, at the Seattle Hyundai dealership there are 6 cars all waiting 6+ weeks on replacement parts for this issue. This seems like a significantly bigger problem than Hyundai is admitting and they are not proactively addressing with urgency. Thankfully we were only on a busy arterial not on a highway.
ICCU and HV Fuse blew
My 2022 Ioniq 5 had an ICCU failure on February 2025. On February 12, 2025 I was not able to charge the car. I took it to the dealer twice for an ICCU software update. The first software update was on October 15, 2024. The second software update was January 16 2025. The third time was on February 13, 2025 for an ICCU failure. The car is at the dealership and waiting for the part so it can be replaced. If you need to do an inspection the car is at the dealership. There was no warning, it just will not take a charge. I have been waiting for a little over a month for the part to arrive at the dealership for replacement. I've call the dealership multiple times inquiring about the new replacement. They have no idea when this part will become available. I'm frustrated because no one knows anything so my car sits on their lot waiting for a part that I feel they should have in stock. Hyundai has known about the ICCU failures since 2022. Why Hyundai dealerships do not have ICCU's readily available? Knowing very well about these recalls and failures.
I was driving home on a very cold morning and heard a "thunk" in the back right of my car. Almost immediately I got a warning that my cars electrical vehicle system needed attention. That quickly turned to a turtle telling me the issue with the electric vehicle system was limiting speed. Eventually my car stopped working. I had the 12v battery jumped and got it home. After charging the 12v battery for over a day and calling a local dealership, they determined it was most likely the ICCU. I drove my car around to the front of my house and immediately got the same warning. It was towed that same day. It has now been 2 weeks and the part is on back-order.
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.
ICCU failure preventing car from AC charging. In shop 25 days now but part not available and not given estimated repair time. Car was bought new and has 24,600 miles on it.
ICCU failure. Vehicle abruptly reduced speed while on the road. Hyundai has inspected the vehicle and confirmed the failure. "Stop vehicle and check power supply" warning. "Check electric vehicle system" warning. "12v batter voltage low. Stop safely" warning. All first appeared within a few minutes of the vehicle losing power. Vehicle has been at dealership for repair/replacement of ICCU since February 7th.
Even after getting all recalls done my IONIQ5 had an ICCU failure. I feel that latest update which was supposed to fix ICCU issue actually accentuated it. With number of complaints on this car for ICCU failure there should class action law suit on Hyundai
On the morning of February 3rd, 2025, while driving, I heard a pop. A few seconds later, as I approached an intersection, a yellow warning appeared that instructed me to "Check the Electric Vehicle System". It minimized to a small caution light. I attempted to continue driving, pulling through the intersection; however, the vehicle had an abrupt loss of power; I was unable to proceed over 20-25 mph. In total no more than 2-3 mins passed from hearing the pop to loss of power. I pulled into a neighborhood, stopped the car, and consulted the owner's manual for direction on the warning light. While parked, and an estimated 8-10 minutes after hearing the first pop, I received a second warning, this time in red. It said "Turn power off immediately. Check power supply." I turned car off/contacted roadside, as advised in my manual, for a tow. After review at the dealership, I was originally told I needed a new 12V that it had died while I was driving. I authorized the replacement, though I also indicated to the service department that if that CAN happen, it really does not make sense AND there should be a different warning indicator for a failed 12v that could be replaced roadside versus instructing for a tow.However, after replacing my 12v the service advisor indicated that the car pulled codes and that the ICCU and its fuse seemed to have failed, which likely caused the damage to the 12v battery. After a few days of testing, my car was cleared for replacement of the failed ICCU by Hyundai's techline on February 10th. The dealer then provided a vehicle for my use while I await repairs. I was told a part could arrive the 18th or the 25th and the repair could take 3-4 days once the parts are received. It is still in shop with no updates. On 2/13/25 I filed a complaint to Hyundai; I have not received a response to date. All recalls for these issues had been performed on my vehicle in November 2024; we can no longer, in good conscience, use this vehicle. It is unsafe.
My vehicle’s ICCU failed resulting in my 12v battery suddenly, and without warning, fail. Leaving me stranded. This seems to be a widespread issue that isn’t being addressed properly as following the manufacturer’s list of recall updates never solved the issue up to my day of failure.
My car suffered a failure of the Integrated Charge Control Unit ("ICCU") which makes the car underivable. This is the third time that I have had an issue with the ICCU. The first two times, it failed to charge the 12V battery, leading to a loss of all 12V systems and being unable to drive the car. This third time, the car now refuses to charge on AC power. Hyundai has tried to "repair" this issue with software updates, but it doesn't fix it. Now I am waiting for a remanufactured ICCU to replace my broken one.
This is the second time I’ve taken my Hyundai IONIQ 5 in to Hyundai as part of a recall “fix” for ICCU Failure. Each time, the car has been operating fine, I take the car in for the “fix” as it’s required, and then shortly after the car breaks down while it’s in motion / operating. I’ve concluded these are not “fixes” and I have no ability to trust the safety or reliability of the vehicle. 1) ICCU Failure 8 Days After Recall “Fix”. Same thing happened the previous year. Took the car in for the recall “Fix” and shortly after the car dangerous broke down while driving. 2) Car became a brick. 3) Yes, Hyundai Service Center has confirmed ICCU fault. 4) Yes, see #3 5) Yes, minutes before the car became inoperable.
Car will start but has no propulsion. Error says “Check EV System”
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