I purchased the 2023 Hyundai Ioniq 5 Limited edition car on 12/20/2025. On 01/03/2026, a warning light came on and said I needed to check my electrical system. I drove 3 miles home and made an appointment with the Hyundai dealership on 01/05/26. On the morning of 01/05/26, as I was attempting to drive the car to the dealership, a turtle symbol appeared on the dashboard and said power limited. Three blocks later, the warning sign popped up that said pull over immediately. I pulled over as far as I could but the car completely died right in front a no parking sign. I had to wait for three hours in the freezing cold to get the car towed to the dealer. After two days, the dealer confirmed that the ICCU unit had failed and it would be replaced under warranty. One month later, I still do not have my car back, as the part is on backorder. Luckily, we had not taken this car to the mountains 1 week prior, or we would have been stranded in the freezing cold with minimal cell phone reception.
2023 Hyundai Ioniq 5 electrical complaints
Page 4 of 10: complaints 71 to 100 of 273, newest first, as owners wrote them.
ICCU failed 12/29/25, car inoperable and towed to dealer. Luckily this was in my garage , had it been on the freeway it would have been very dangerous and car goes into limp mode. Car red battery light and made chimes. Only has 25,000 miles on it. Has been at dealer since then with no resolution update.
My 2023 Hyundai Ioniq 5 lost all power and stopped in the middle of a busy road. I had no power even when I pressed the gas. Nothing in the car worked, including the hazard lights, which made it even more dangerous as cars were speeding past me. I was finally able to call the police to come help and they set up a safe area. However, I was put in an unsafe situation while I waited for assistance from the police. In addition, there was no way to put the car in neutral once the power was off (at least I couldn't find a button or a switch to do that), which made it difficult to get it towed. I understand the car died on me because of faulty ICCU on my car. Btw, the car had just finished its software update earlier that day. I am not sure if this somehow contributed to the ICCU failure.
The 12 V battery failed within two years of the delivery of the car. I believe this is due to the design of the charging unit within it as many other others report the same problem.
twice this car has has experienced iccu failures. both time the car was on the road traveling when electrical system failure warning was alarm. last incident had to stop along road and towed to hyundai shop
After having service done for the past two ICCU recalls months and months ago, I’m driving along today and hear the loud pop that everyone else reports. My car immediately went to a reduced power state where I was able to limp a bit further until I lost all power. I had to have the vehicle towed (by a wheel lift/dolly equipped wrecker - do not allow a flatbed they’ll drag your car into the truck) to the nearest dealership and now await to hear how long I’ll have to be without it.
Unknown or ICCU car constantly has 12v battery probably and requires a jump start 1 to 2 times a month. The dealership can diagnose the issue cause the problem has to happen at the dealership and they can't replicate it. I've left my car there for 2 weeks and they couldnt replicate it. When I get it back, with in 2 weeks the car has the 12 volt issue and then fails. We tried to do what the dealership asks, tow it in, but that can't be done without the battery being reset and then they can't replicate the error.
The ICCU in my 2023 Ioniq 5 has failed for the second time. The 12V battery is dead and the car cannot be driven. It will be sitting at the dealership waiting for a new part for at least a month. Hyundai claims to have fixed the ICCU problem but from online reports it is clear that they have not solved this problem.
ICCU failure after initial recall
The ICCU in my car has failed twice, within an 8 month period. (this submission is to report the 2nd occurrence) At each occurrence, after starting the vehicle, a loud pop was heard. The pop sound is known to be the fuse in-line with the ICCU. After driving the car a short distance, the dashboard displayed warning messages to "Check Electric Vehicle System" and to pull the car to a safe area. Fortunately, I was not moving fast and I was able to get the car safely parked within a few minutes.
The ICCU in my car has failed twice, within an 8 month period. At each occurrence, after starting the vehicle, a loud pop was heard. The pop sound is known to be the fuse in-line with the ICCU. After driving the car a short distance, the dashboard displayed warning messages to "Check Electric Vehicle System" and to pull the car to a safe area. Fortunately, I was not moving fast and I was able to get the car safely parked within a few minutes.
The car became inoperable after a "Check EV" warning appeared. The vehicle had to be towed to the dealership. Fortunately I was able to avoid an accident. The dealer tells me that the ICCU (Integrated Charge Controller Unit) failed which was part of an earlier recall that I took the car in to the dealer for and they only updated software but now the related hardware has failed afterwards. This is something that is extremely unsafe if it happens while driving. Hyundai needs to correct this with an improved and safe ICCU.
While driving my 2023 Ioniq5 I got a warning on the dashboard about losing power and immedately the car slowed itself down to about 15 MPH, once I was able to get to a safe spot to pull over I stopped the car and it would not start again. I had it towed to the dealer and it has been a week and the ICCU is still on backorder. No idea when I will have the car back.
ICCU failure. All recalls had been performed prior to failure. Vehicle showed the following warnings: "12 volt battery low", "stop safely", "check electric vehicle system", "stop vehicle and check power supply". Replaced 12-volt battery, still showing error messages, unable to be driven, required a tow to the dealer. OBD-II scan showed error P1A9096, confirmed by dealer as an ICCU malfunction.
The car stopped being able to charge on AC level 1 and level 2, only able to charge on DC Fast. Took it to the dealership and they diagnosed an ICCU failure, rendering it undriveable. The part is under warranty but is backordered. I have already been waiting for 14 days, and they have no update for when they'll get the part in.
Hyundai model Ioniq 5 (all years and trim styles) have a known issue with ICCUs (Integrated Charging Control Unit) that fail. This component controls charging of the 12 volt battery, and in turn electrical systems. Hyundai replaced my ICCU, but I am concerned it may fail again, as the underlying issue does not seem to be known or addressed. When the ICCU fails, the vehicle can suddenly lose the ability to move. This can be extremely dangerous if the car is in motion and unable to safely pull over. Luckily, my ICCU failed in the middle of a parking lot. Many Ioniq 5 owners report this issue, some multiple times on multiple ICCUs.
ICCU failed, leaving the car incapacitated and driver stranded. Car was towed to the dealership and repaired under warranty.
Vehicle experienced sudden loss of power while driving at highway speed. While driving on the interstate at highway speed in dark, snowy, high-traffic conditions, the vehicle displayed a warning about an electrical system fault and instructed me to “stop safely.” The vehicle immediately lost some propulsion and ramped down speed. We were only narrowly able to exit the highway before it would not move further. We were very lucky that no one hit us- it is extremely unsafe to drastically decrease speed on highway. Our family was in the car and it was very, very scary. We were able to use the heating system while parked for a few minutes before we lost all power completely. The vehicle was towed to a Hyundai dealership and is completely inoperable. The service manager stated the failure is consistent with a known ICCU (Integrated Charging Control Unit) failure. The dealership reports having many Ioniq vehicles with similar ICCU failures awaiting backordered parts, with no estimated repair timeline.
The contact owns a 2023 Hyundai Ioniq 5. While driving at an undisclosed speed, the vehicle shut down unexpectedly, leaving the contact stranded for several hours. A RED warning light was illuminated, indicating an electrical failure, followed by the battery warning light being illuminated, leading to the loss of power. The vehicle was towed to the nearest dealer to be diagnosed. The dealer determined that the Integrated Charging Control Unit (ICCU) needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the issue. The failure mileage was approximately 28,000.
My 2023 Hyundai Ioniq 5 suffered a sudden Integrated Charging Control Unit (ICCU) failure that put me in grave danger. As I left my workplace in the evening, I heard a “pop” sound and got the dashboard warning, “Check Electrical Vehicle System.” It was unclear what the warning meant. I had 65% charge left at that point. As I began driving, the gas pedal “stuck,” not allowing me to accelerate past 25 mph, and it felt like the car was dragging. I did not know what was happening. The “Check Electrical Vehicle System” warning returned but gave no indication of whether it was safe to drive or what to check in the electrical system. Driving very slowly, I made it out of the military base (my workplace), parked outside of a closed establishment, and called my husband. He told me to drive further up the road to a well-lit shopping area. I exited the parking lot and entered the intersection of a four-lane highway – and suddenly, when I was in the center about to turn in the direction of traffic, the car stopped and would not respond to the gas pedal. I could not accelerate and was stuck in the middle of the highway. After several frantic pushes on the gas pedal, I was able to coast downward to the shoulder and exit the vehicle. My husband and I had brought the car to the dealer in February 2025 for the December 20, 2024 ICCU recall (the federal safety agency Recall 24V‑868, Hyundai Recall 272). The dealer merely inspected the car and updated its ICCU software. Per Hyundai guidance, it did not replace the ICCU itself. It is taking no apparent steps to do so for 2023 Ioniq 5 owners, leaving us in danger. The seriousness of this problem is compounded by the lack of adequate warning when it occurs out of the blue. The generic “Check Electrical Vehicle System” indicator on the dashboard did not indicate what precisely in the electrical system to check, how serious the issue was, or how much of the 12-volt battery power was left. Hyundai must rectify this issue before others are hurt.
ICCU failed while driving, car limited speed immediately. This was after software recall was preformed a few months prior. Car went limp mode and repairs are going to take an indefinite time.
This car (and many other Hyundai Ioniq5's) has stopped with very little warning twice in the two years that I have owned it. The first time was on a two lane highway with no shoulder. when it stopped there was no way to warn cars coming from behind because there was electricity at all and therefore no emergency flashers. This particular car is six months too old for the Washington State Lemon Law to apply. So far it has been reprogrammed twice and had the ICCU component replaced twice. I really don't think this car, and other Ioniqs with the same problem, on the road.
Car lost power on highway, power lost.
On the drive home the car dinged at me and put up the "Power Limited" message with the turtle icon. This limited me to 15mph maximum, so I ended up driving home in the shoulder as the roads are 50mph roads and would have created a major incident if I tried to stay in the lane. I was within a mile of my house so I limped home and pulling into the driveway the car switched to "Check Electrical Systems" and "12V battery voltage low. Stop Safely" as I pulled into the garage. This was at 8pm so I was not able to do anything else. I was able to have Hyundai Roadside Assistance tow the car, which did turn on next day in the morning to pull out of the garage and turn around. The car sat at the dealership for a week until they were able to look at it an confirm that the ICCU was broken. This happened right before New Years so I get taking a week to look at it. Right now they mentioned the part is on backorder and there is no schedule for repairs. This is a major issue for this line of cars and needs to be resolved. The car is not safe to drive long distance as this is the second time this has happened. For a 2023 model year it is almost a yearly occurrence now. My warranty will run out by mileage in ~44k miles and at that point this defect will be my responsibility.
Pulling car out of my garage onto the driveway heard pop from rear of vehicle and display of "Check electric vehicle system" message. My OBD2 scanner reported the P1A90 ICCU failure code. Vehicle was current on all recalls and has been regularly Hyundai serviced since purchase January 2023. After consulting with dealer, car was towed to the dealer. Awaiting notification on repairs. How many more owners need to go through this without a full the federal safety agency directed recall???
ICCU failure at just 10k miles. Was driving, car kind of "jolted" and warning came on screen saying "check electric vehicle system" then warning said "stop vehicle, check power supply." So I limped to a stop and got a tow. It sounds like an increasingly prevalent issue even though my specific VIN did not have an open recall. Does not sound like Hyundai is taking this seriously.
ICCU and 12V both failed
Upon entering vehicle in the morning of 12/30/25, a notable smell was first present. After turning on the vehicle, the car dashboard showed a "Check electric vehicle system" warning. The car was not able to be put into any gear besides neutral. Car was towed to dealership, and received word on 1/2/26 that an ICCU failure was the cause.Thankfully this occurred while parked in my garage, so was not in immediate danger. Perhaps this isn't a safety issue, but I am not sure what would have happened had the ICCU blown while driving so thought worth reporting.
The contact owns a 2023 Hyundai Ioniq 5. The contact stated that while driving 4 MPH, the vehicle lost power and stalled a mile from the residence. The message "Check Electrical System" was displayed. The hazard light was activated but quickly became inoperable. The contact called AAA towing, where a power booster was attached to the vehicle, and the vehicle was restarted. The contact was able to drive back to the residence. The AAA driver indicated that he had towed eight other similar vehicles to the same local dealer. The vehicle was towed to the local dealer, but was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 16,000.
Our 2023 Hyundai Ioniq 5 had the ICCU software update recall and subsequent complete failure of the ICCU, which was repaired. Yesterday the car again warned us of the 12v system failure and rendered it not only undrivable and unstartable, but also unlockable in the public parking area where it still sits awaiting a tow to the dealer tomorrow (they are closed on New Years Day. This is the second time the ICCU has failed, rendering the car totally inoperable and in this case stranding my wife in freezing cold.
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