NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
37 reportsClear category filterMileage unknown · Dec 28, 2025
Electrical SystemPower TrainVehicle Speed Control
The vehicle is less than 1 years old. Had 91% charge left. Turned in the car as usual. Turned in heated seats and heated steering wheel as the outside temp was 34 degrees. A pop noise occurred and my entire dashboard flashed like a Christmas tree saying electrical system failure. Pull over safety. The cars speed was reduced to…
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The vehicle is less than 1 years old. Had 91% charge left. Turned in the car as usual. Turned in heated seats and heated steering wheel as the outside temp was 34 degrees. A pop noise occurred and my entire dashboard flashed like a Christmas tree saying electrical system failure. Pull over safety. The cars speed was reduced to 20 mph. This was extremely scary as this happened on a main road where the speed limit was 55. The ICCU failed according to the dealer. This has been a common issue among Ioniq5 cars and the manufacturer has failed to fixed this issue. This car presents a high failure rate of the ICCU computer that controls the entire car. Once this chip fails, the car can not be driven and it must be towed back to the dealership. This is not a one off. Hyundai also quietly remove the remote start feature to activate the heated seats. They must know that turning on the heated seats might trigger an overload causing possible risk of iccu failure.
NHTSA ODI #11707410
Mileage unknown · Dec 28, 2025
Electrical SystemPower Train
The ICCU failed while driving. A loud pop occured then a red warning light came up asking you to stop the vehicle and check the power supply. The car went into turtle mode where I could at best drive 25 miles per hour. This car was part of a recall last year to prevent this issue, however only a software fix was performed. L…
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The ICCU failed while driving. A loud pop occured then a red warning light came up asking you to stop the vehicle and check the power supply. The car went into turtle mode where I could at best drive 25 miles per hour. This car was part of a recall last year to prevent this issue, however only a software fix was performed. Luckly I was able to get the car home on a very cold day.
NHTSA ODI #11707319
Mileage unknown · Dec 18, 2025
Fuel/propulsion SystemPower Train
When I started driving my car a warning to check the electrical system came on the display and the speed of the car dropped to less than 25 mph. The road we were driving on was over 45mph without a safe shoulder. After it was towed to the dealer, they diagnosed that the ICCU had failed and replaced it and a fuse. This was aft…
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When I started driving my car a warning to check the electrical system came on the display and the speed of the car dropped to less than 25 mph. The road we were driving on was over 45mph without a safe shoulder. After it was towed to the dealer, they diagnosed that the ICCU had failed and replaced it and a fuse. This was after all recalls and other software updates were performed many months ago.
NHTSA ODI #11705960
Mileage unknown · Dec 17, 2025
Power TrainUnknown Or Other
My 2024 ioniq 5 has no recall but they have a well known issue where the ICCU does not charge the 12v as expected. this results in loss of power. In my situation, i was driving on the freeway at 65MPH when i got the low 12V battery message and my car slowed down and I was not able to accelerate at even street speed. I was fortun…
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My 2024 ioniq 5 has no recall but they have a well known issue where the ICCU does not charge the 12v as expected. this results in loss of power. In my situation, i was driving on the freeway at 65MPH when i got the low 12V battery message and my car slowed down and I was not able to accelerate at even street speed. I was fortunate enough to pull the car over from the left lane to the right shoulder as the traffic was light. This could have easily resulted in an accident. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI #11705579
Mileage unknown · Dec 10, 2025
Electrical SystemFuel/propulsion SystemPower Train
While accelerating onto a road with cars approaching from behind, vehicle entered limp mode and was restricted to 25 MPH. I was forced to leave the roadway to avoid a collision with the vehicle behind. The street this occurred on has a speed limit of 40 MPH. The vehicle's normal acceleration was sufficient to ensure a safe gap …
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While accelerating onto a road with cars approaching from behind, vehicle entered limp mode and was restricted to 25 MPH. I was forced to leave the roadway to avoid a collision with the vehicle behind. The street this occurred on has a speed limit of 40 MPH. The vehicle's normal acceleration was sufficient to ensure a safe gap to the approaching car, but the time it took to recognize and react to the unexpected behavior reduced this gap. The dealer diagnosed this as an ICCU failure related to safety recall 272. All prior recalls were complete at the time of the incident.
NHTSA ODI #11704290
Mileage unknown · Aug 7, 2025
Power Train
ICCU failure, resulting in 12v discharge and complete immobilization of car. The car's safety systems gave sufficient warning to allow me to get somewhere safe -- but the nature of the failure also disabled it's ability to maintain a call with blulink to coordinate a pickup. Luckily my cell also had service.
NHTSA ODI #11679125
Mileage unknown · Jul 11, 2025
Power Train
I was driving 10-15km/h over speed bump suddenly my car going backwards I took a glimpse on my display panel and it showed that the car was in D mode. This is seriously can cause accident!
NHTSA ODI #11672966
Mileage unknown · Jul 6, 2025
Electrical SystemFuel/propulsion SystemPower Train
I had ICCU software recall done in spring 2025 then Vehicle died twice while driving on highway, ...suddenly. "warning 12 volt batt low pull over" stranding my family twice on highway. could not operate anything. Mc Govern Hyundai said it was fixed after 44 days. 2 days later failed again .dealer said it was ok again but would…
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I had ICCU software recall done in spring 2025 then Vehicle died twice while driving on highway, ...suddenly. "warning 12 volt batt low pull over" stranding my family twice on highway. could not operate anything. Mc Govern Hyundai said it was fixed after 44 days. 2 days later failed again .dealer said it was ok again but would not replace ICCU or 12v batt. the amber light that indicates when !2v batt. is being charged would never come on. they said they found nothing wrong.
NHTSA ODI #11671393
Mileage unknown · Jun 22, 2025
Electrical SystemFuel/propulsion SystemPower Train
Dear NHTSA, On [XXX] at [XXX] CST, my 2024 Hyundai Ioniq 5 SEL experienced a sudden ICCU failure. While reversing into my driveway, I heard a loud “pop,” followed by warning messages: “Stop vehicle and check power supply” and “Check electric vehicle system.” A DTC scan showed code P1A90(96). The car became inoperable and had to…
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Dear NHTSA, On [XXX] at [XXX] CST, my 2024 Hyundai Ioniq 5 SEL experienced a sudden ICCU failure. While reversing into my driveway, I heard a loud “pop,” followed by warning messages: “Stop vehicle and check power supply” and “Check electric vehicle system.” A DTC scan showed code P1A90(96). The car became inoperable and had to be towed to a Hyundai dealership. The dealer confirmed ICCU failure and replaced both the ICCU and fuse on 6/17/2025. However, the replacement was not a redesigned part—it was the same model that failed. I purchased this vehicle in March 2025 as a Certified Pre-Owned with ~12,000 miles. All recall-related ICCU updates had been completed before this incident. There were no warning signs before the failure. This failure could have been dangerous had it occurred on a highway, in extreme weather, or far from help with my [XXX] daughter with me. I no longer feel safe driving this car. Hyundai’s recall remedy is clearly not effective, and they continue replacing defective ICCUs with the same flawed units. They have not disclosed the root cause or implemented a permanent fix. I urge NHTSA to: Investigate ongoing ICCU failures despite recall compliance. Mandate a stop-sale of affected vehicles until a real fix is found. Require Hyundai to disclose the root cause. Consider a buyback program if no safe solution is available. This is a serious safety risk. These failures will continue without regulatory action. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI #11668456
Mileage unknown · May 19, 2025
Electrical SystemFuel/propulsion SystemPower Train
ICCU (Intergrated Charging Control Unit) failed after two mandatory recalls were completed. Vehicle is not drivable as it’s awaiting for a replacement ICCU (backordered). Replacement ICCU will not remedy the issue since it has not been improved upon from the original failure. Vehicle shutdown on a two lane highway with a 65mph…
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ICCU (Intergrated Charging Control Unit) failed after two mandatory recalls were completed. Vehicle is not drivable as it’s awaiting for a replacement ICCU (backordered). Replacement ICCU will not remedy the issue since it has not been improved upon from the original failure. Vehicle shutdown on a two lane highway with a 65mph speed limit. The section where the vehicle shutdown was without cellular service and on a bend with no shoulder, which increased the risk of an accident. The problem was reproduced in other vehicles using the same part. The component has been inspected by the manufacturer and dealer with a temporary remedy of replacement. Warning lights appeared after the failure occurred; essentially giving the driver no warning or time to react. The vehicle displayed a warning message to pull over and turn off vehicle immediately. Power was reduced to 15mph for about 15-20 minutes.
NHTSA ODI #11661948
Official recalls
3Jul 2, 2026
Hyundai Motor America (Hyundai) is recalling certain 2023-2024 Ioniq 5 vehicles. The high voltage battery cells may contain misaligned electrodes, which can lead to a fire while parked or driving.
Consequence & remedy
Consequence: A fire increases the risk of injury.
Remedy: Owners are advised to park outside and away from structures and limit their charge to a maximum of 80% until the recall repair is complete. Dealers will replace the high voltage battery system assembly, free of charge. Owner notification letters are expected to be mailed August 31, 2026. Owners may contact Hyundai's customer service at 855-371-9460. Hyundai's number for this recall is 305. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on July 3, 2026.
Nov 18, 2024
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2025 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-volt battery, which can result in a loss of drive power.
Consequence & remedy
Consequence: A loss of drive power increases the risk of a crash.
Remedy: Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters were mailed December 20, 2024. Owners may contact Hyundai customer service at 1-855-371-9460 or Genesis customer service at 1-844-340-9741. Hyundai's numbers for this recall are 272 (Hyundai) and 025G (Genesis). This recall expands and replaces previous recall number 24V-204. Vehicles previously repaired under recall 24V-204 will need to have the new remedy completed.
Additional source detail variants (2)
Electrical System:propulsion System:charging:module:software
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2025 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-volt battery, which can result in a loss of drive power.
Consequence: A loss of drive power increases the risk of a crash.
Remedy: Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters were mailed December 20, 2024. Owners may contact Hyundai customer service at 1-855-371-9460 or Genesis customer service at 1-844-340-9741. Hyundai's numbers for this recall are 272 (Hyundai) and 025G (Genesis). This recall expands and replaces previous recall number 24V-204. Vehicles previously repaired under recall 24V-204 will need to have the new remedy completed.
Electrical SYSTEM:12V/24V/48V Battery
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2025 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-volt battery, which can result in a loss of drive power.
Consequence: A loss of drive power increases the risk of a crash.
Remedy: Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters were mailed December 20, 2024. Owners may contact Hyundai customer service at 1-855-371-9460 or Genesis customer service at 1-844-340-9741. Hyundai's numbers for this recall are 272 (Hyundai) and 025G (Genesis). This recall expands and replaces previous recall number 24V-204. Vehicles previously repaired under recall 24V-204 will need to have the new remedy completed.
Mar 15, 2024
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2024 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-Volt battery, which can result in a loss of drive power.
Consequence & remedy
Consequence: A loss of drive power increases the risk of a crash.
Remedy: This recall is replaced by NHTSA recall number 24V-868. Vehicles already repaired under this recall will need to have the new remedy completed. Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters were mailed April 22, 2024. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 257/021G.
Additional source detail variants (2)
Electrical SYSTEM:12V/24V/48V Battery
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2024 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-Volt battery, which can result in a loss of drive power.
Consequence: A loss of drive power increases the risk of a crash.
Remedy: This recall is replaced by NHTSA recall number 24V-868. Vehicles already repaired under this recall will need to have the new remedy completed. Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters were mailed April 22, 2024. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 257/021G.
Electrical System:propulsion System:charging:module:software
Hyundai Motor America (Hyundai) is recalling certain 2022-2024 IONIQ 5, 2023-2024 IONIQ 6, Genesis GV60, Genesis GV70 "Electrified," and Genesis G80 "Electrified" vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-Volt battery, which can result in a loss of drive power.
Consequence: A loss of drive power increases the risk of a crash.
Remedy: This recall is replaced by NHTSA recall number 24V-868. Vehicles already repaired under this recall will need to have the new remedy completed. Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters were mailed April 22, 2024. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 257/021G.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1PE23011 · Loss Of Motive Power
Opened Jun 8, 2023 · Closed Apr 17, 2024
Status: closed (inferred from source dates) · Electrical SYSTEM:12V/24V/48V Battery; Electrical System:propulsion System:dc/dc Converter
On June 8, 2023, the Office of Defect Investigation (ODI) opened PE23011 to investigate allegations of loss of motor power on model year (MY) 2022 Hyundai Ioniq 5 vehicles. Some consumers reported loss of motor power immediately after a warning lamp illumination or reduction of motive power while the vehicle was in motion. This investigation found that the Integrated Charging Control Unit (ICCU) may be subject to various conditions such as overcurrent, overvoltage induced at the end of charging, and certain thermal loading during operation that can damage its internal components and open the ICCU fuse, resulting in an inability to charge the 12-volt battery. The vehicle could eventually lose all motive power, increasing the risk of a crash. In July 2023, Hyundai issued a service campaign to address certain MY 2022-2023 Ioniq 5 and MY 2023 Ioniq 6 vehicles that may have low 12V auxiliary battery charging occurrences due to an ICCU fault and may set the DTC P1A9096 “DC/DC Converter Input Voltage Sensor Fault”. On March 15, 2024, Hyundai filed Safety Recall 24V-204 for 98,878 MY 2022-2024 Hyundai Ioniq 5 vehicles and MY 2023-2024 Hyundai Ioniq 6, Genesis GV60, Genesis GV70 “Electrified” and Genesis G80 “Electrified” vehicles. The recall remedy provides an inspection, and if necessary, a replacement of the ICCU and the associated fuse. The ICCU software reduces the risk of overcurrent and implements voltage peak reduction at the end of EV battery charging. The recall also includes a software update that revises the electric water pump operational threshold to reduce thermal loading during charging and driving. In view of the recall action being taken by Hyundai, ODI is closing this Preliminary Evaluation. The agency reserves the right to take additional action if warranted by future circumstances. To review the reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.
Additional source detail variants (2)
Electrical SYSTEM:12V/24V/48V Battery
On June 8, 2023, the Office of Defect Investigation (ODI) opened PE23011 to investigate allegations of loss of motor power on model year (MY) 2022 Hyundai Ioniq 5 vehicles. Some consumers reported loss of motor power immediately after a warning lamp illumination or reduction of motive power while the vehicle was in motion. This investigation found that the Integrated Charging Control Unit (ICCU) may be subject to various conditions such as overcurrent, overvoltage induced at the end of charging, and certain thermal loading during operation that can damage its internal components and open the ICCU fuse, resulting in an inability to charge the 12-volt battery. The vehicle could eventually lose all motive power, increasing the risk of a crash. In July 2023, Hyundai issued a service campaign to address certain MY 2022-2023 Ioniq 5 and MY 2023 Ioniq 6 vehicles that may have low 12V auxiliary battery charging occurrences due to an ICCU fault and may set the DTC P1A9096 “DC/DC Converter Input Voltage Sensor Fault”. On March 15, 2024, Hyundai filed Safety Recall 24V-204 for 98,878 MY 2022-2024 Hyundai Ioniq 5 vehicles and MY 2023-2024 Hyundai Ioniq 6, Genesis GV60, Genesis GV70 “Electrified” and Genesis G80 “Electrified” vehicles. The recall remedy provides an inspection, and if necessary, a replacement of the ICCU and the associated fuse. The ICCU software reduces the risk of overcurrent and implements voltage peak reduction at the end of EV battery charging. The recall also includes a software update that revises the electric water pump operational threshold to reduce thermal loading during charging and driving. In view of the recall action being taken by Hyundai, ODI is closing this Preliminary Evaluation. The agency reserves the right to take additional action if warranted by future circumstances. To review the reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.
Electrical System:propulsion System:dc/dc Converter
On June 8, 2023, the Office of Defect Investigation (ODI) opened PE23011 to investigate allegations of loss of motor power on model year (MY) 2022 Hyundai Ioniq 5 vehicles. Some consumers reported loss of motor power immediately after a warning lamp illumination or reduction of motive power while the vehicle was in motion. This investigation found that the Integrated Charging Control Unit (ICCU) may be subject to various conditions such as overcurrent, overvoltage induced at the end of charging, and certain thermal loading during operation that can damage its internal components and open the ICCU fuse, resulting in an inability to charge the 12-volt battery. The vehicle could eventually lose all motive power, increasing the risk of a crash. In July 2023, Hyundai issued a service campaign to address certain MY 2022-2023 Ioniq 5 and MY 2023 Ioniq 6 vehicles that may have low 12V auxiliary battery charging occurrences due to an ICCU fault and may set the DTC P1A9096 “DC/DC Converter Input Voltage Sensor Fault”. On March 15, 2024, Hyundai filed Safety Recall 24V-204 for 98,878 MY 2022-2024 Hyundai Ioniq 5 vehicles and MY 2023-2024 Hyundai Ioniq 6, Genesis GV60, Genesis GV70 “Electrified” and Genesis G80 “Electrified” vehicles. The recall remedy provides an inspection, and if necessary, a replacement of the ICCU and the associated fuse. The ICCU software reduces the risk of overcurrent and implements voltage peak reduction at the end of EV battery charging. The recall also includes a software update that revises the electric water pump operational threshold to reduce thermal loading during charging and driving. In view of the recall action being taken by Hyundai, ODI is closing this Preliminary Evaluation. The agency reserves the right to take additional action if warranted by future circumstances. To review the reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.
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