NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
404 reportsMileage unknown · May 17, 2023
Electrical SystemFuel/propulsion SystemPower Train
Likely ICCU failure incapacitated vehicle while in motion on highway. Vehicle decelerated uncontrollably and would not re-accelerate. Shortly thereafter 12v battery warning appeared and vehicle was no longer operable. Series of warning lights. “check electric vehicle system” upon car starting, “Stop vehicle and check power …
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Likely ICCU failure incapacitated vehicle while in motion on highway. Vehicle decelerated uncontrollably and would not re-accelerate. Shortly thereafter 12v battery warning appeared and vehicle was no longer operable. Series of warning lights. “check electric vehicle system” upon car starting, “Stop vehicle and check power supply” shortly after starting drive, "12v battery very low" immediately before vehicle went completely dead.
NHTSA ODI #11522548
Mileage unknown · May 16, 2023
Forward Collision AvoidanceSteeringVehicle Speed Control
While driving on highway I got below messages “Safety Functions are limited radar block warning message” Warning message went away after 15 minutes but then “Stop Vehicle Check Power Supply” warning message appeared and vehicle slowed on highway and stopped after 2 miles. Dealer replaced ICCU and Fuse that controls high v…
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While driving on highway I got below messages “Safety Functions are limited radar block warning message” Warning message went away after 15 minutes but then “Stop Vehicle Check Power Supply” warning message appeared and vehicle slowed on highway and stopped after 2 miles. Dealer replaced ICCU and Fuse that controls high voltage (charges 12v battery from main battery).
NHTSA ODI #11522378
Mileage unknown · May 11, 2023
Electrical SystemPower Train
While driving to work on a 55 MPH road (single lane in each direction) my car faulted with warnings for me to pull over immediately and check my batteries. At the same time, the car's speed dropped quickly to a maximum of 24 MPH, which nearly caused the cars behind me to collide. After pulling over, I was able to limp into a sa…
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While driving to work on a 55 MPH road (single lane in each direction) my car faulted with warnings for me to pull over immediately and check my batteries. At the same time, the car's speed dropped quickly to a maximum of 24 MPH, which nearly caused the cars behind me to collide. After pulling over, I was able to limp into a safe area and call a tow truck. The service shop informed me that my Integrated Charge Control Unit and fuse needed to be replaced. I am still waiting for the part to come in (estimated delivery of two months). This issue is not isolated to me; others in social media groups have experienced similar issues with their MY 2022 Ioniq 5. Hyundai is quiet on how widespread the issue is, but given that there is a safety concern when one's auto suddenly slows down while on a highway, I thought it worth reporting.
NHTSA ODI #11521543
Mileage unknown · May 9, 2023
Exterior LightingService Brakes
When using the car in "i-Pedal" (one-pedal driving) mode — the highest brake regen setting — the car can come to a complete stop whenever I lift my foot off the accelerator pedal, without touching the brake. While in this mode, when I fully lift my foot off the accelerator, the rear brake lights illuminate as expected, however…
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When using the car in "i-Pedal" (one-pedal driving) mode — the highest brake regen setting — the car can come to a complete stop whenever I lift my foot off the accelerator pedal, without touching the brake. While in this mode, when I fully lift my foot off the accelerator, the rear brake lights illuminate as expected, however, I often slowly reduce pressure on the accelerator pedal to come gently to a stop. I've noticed that it's possible (and often the case) that I can decelerate to a full stop without the brake lights illuminating until I fully release the brake pedal (at the very last moment before I stop). This means that I can be slowing down at a pretty significant rate without any indication to the drivers behind. Conversely, when using the automatic cruise control (that keeps the car a set distance from car ahead), the brake lights seem overly active and flash on and off quite frequently, especially when going down hills (even if there is no deceleration and the car seems to be coasting). Both of these anomalies seem to aggravate other drivers following the car for different reasons, since the vehicle's intent isn't being properly communicated. The lack of expected brake lights when decelerating gently via i-Pedal mode seems potentially dangerous. I would recommend that Hyundai tune their software so that the brake lights illuminate automatically past a set threshold of deceleration/regen braking (above what would be expected if the car were simply coasting), but not requiring the driver to fully lift off the pedal, since at that point, the rate of deceleration is already uncomfortably high for typical driving.
NHTSA ODI #11521193
Mileage unknown · May 9, 2023
Electrical SystemFuel/propulsion System
A few minutes into my drive I heard a loud POP from under the rear seat and then an orange EV system warning message flashed on the display. The vehicle slowed down and I couldn’t maintain speed above about 25mph. Shortly after the first orange alert, the red “Stop vehicle and check power supply” message popped up on the screen…
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A few minutes into my drive I heard a loud POP from under the rear seat and then an orange EV system warning message flashed on the display. The vehicle slowed down and I couldn’t maintain speed above about 25mph. Shortly after the first orange alert, the red “Stop vehicle and check power supply” message popped up on the screen along with an emergency warning sound. The vehicle was towed by Hyundai Roadside Assistance to the nearest certified dealer, which took 1 week to diagnose the car. They just confirmed it was an ICCU (Integrated Charging Control Unit) failure and would require a replacement ICCU and high voltage fuse, which are on backorder with no definitive delivery date.
NHTSA ODI #11521187
Mileage unknown · May 7, 2023
Electrical System
Last night I had an update pushed to my car. I pressed ok. today while backing up i heard a slight pop. my car then said check battery . then second alert said stop vehicle and check power supply. others with this car seem to have this issue as well and is taking a long time to fix and resolve.
NHTSA ODI #11520815
Mileage unknown · May 6, 2023
Power Train
Started car. Heard a pop. “Check electric vehicle system” appeared on the screen. Hyundai arranged for the car to be towed to the dealer. This is likely the ICCU+Fuse failure that seems to be happening to many owners of the Ioniq 5.
NHTSA ODI #11520754
Mileage unknown · May 4, 2023
Electrical SystemFuel/propulsion SystemPower Train
On 4/24/23, without an prior warning vehicle suddenly became undrivable. Received message: "Stop vehicle and check power supply". Car could lim along < 25mph for short distances. This condition along with indifferent Hyundai roadside assist left me stranded out of state for 5 hours before telling me to find my own way to tow …
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On 4/24/23, without an prior warning vehicle suddenly became undrivable. Received message: "Stop vehicle and check power supply". Car could lim along < 25mph for short distances. This condition along with indifferent Hyundai roadside assist left me stranded out of state for 5 hours before telling me to find my own way to tow the car. Car is at dealership with a diagnosed ICCU/ICCU fuse issue. To date I am being told that the parts are on back order for 2-3 weeks. Based upon online posts by others with this issue, this is not a realistic expectation. To date, Hyundai has yet to offer substitute transporation, relief from monthly paments, and reimbursement of all expenses incurred as a result of the loss of this vehicle.
NHTSA ODI #11520367
Mileage unknown · May 2, 2023
Electrical SystemExterior LightingSteering
I was driving to the dealership due to an unusual message. I was on a main street less than 2 minutes from home when an alert came on the screen that said "critical 12v system" I believe. The screen went off shortly after so I was unable to fully capture it. Within 20' the car stopped itself on the road and shut off. All systems…
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I was driving to the dealership due to an unusual message. I was on a main street less than 2 minutes from home when an alert came on the screen that said "critical 12v system" I believe. The screen went off shortly after so I was unable to fully capture it. Within 20' the car stopped itself on the road and shut off. All systems were offline with a total power loss. I could not turn my hazards on, the wheels were locked and I was unable to move the car. I had to stand outside my car to alert oncoming traffic to avoid me. Had I been on the highway when this happened I feel it could have turned deadly quickly, and would have been far worse at night It has been confirmed that the ICCU and high voltage fuse had failed. There are many other owners online speaking of the same problem. The error prior to this reported in the car was "check electric vehicle system." No extended details available, and the online app that shows car codes said "all systems normal" and still does even though the car is entirely dead.
NHTSA ODI #11520155
Mileage unknown · Apr 22, 2023
Electrical System
12 volt battery not recharging from the main EV 77kw battery. This makes it so that car systems cannot start that started late March and went into the dealer April 14,2023, after it happened a dozen or so times.
NHTSA ODI #11518392
Official recalls
3Nov 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.
May 11, 2022
Hyundai Motor America (Hyundai) is recalling certain 2022 Ioniq 5 vehicles. A software error in the Shifter Control Unit (SCU) may disengage the parking mechanism, which can allow the vehicle to rollaway.
Consequence & remedy
Consequence: Vehicle rollaway can increase the risk of a crash or injury.
Remedy: Drivers are recommended to use the Electronic Parking Brake (EPB) when parking their vehicles until the remedy has been performed. Dealers will update the Shifter Control Unit software, free of charge. Owner notification letters were mailed July 14, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 228.
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
3PE24028 · Electrical Arcing And Thermal Events, Potentially Leading To Fires, While Utilizing Enel X Way Usa, Llc's Juicebox Residential Charger.
Opened Oct 3, 2024 · Closed Jun 5, 2025
Status: closed (inferred from source dates) · Equipment:electrical
On October 3, 2024, the Office of Defects Investigations (ODI) opened PE24028 to investigate alleged failures of Enel X Way's JuiceBox Level 2 residential EV chargers. The allegations were described as thermal incidents and electrical malfunctions, which could trip the circuit breakers in Juicebox owners’ homes and disrupt electric vehicle charge cycles. On October 2, 2024, Enel X Way posted on its website that Enel X Way North America would cease operations in the United States and Canada on October 11, 2024. The closure would potentially impact the charging app and supporting software. ODI sent Enel X Way an Information Request (IR) letter on October 21, 2024. Enel X Way provided an incomplete response to the IR on December 9, 2024. Enel X Way later provided a complete response to the IR on January 24, 2025. ODI reviewed Enel X Way’s IR submissions to determine whether further action is required. Based on ODI’s analysis, there was no clear trend in the cause of the failures described in customer complaints and warranty reports. Additionally, there have been no recent reports alleging safety issues. The available information does not warrant further action at this time. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The Agency will continue to monitor for any safety trends and reserves the right to take additional action if warranted by future circumstances. To review the ODI reports cited in this Closing Resume, go to NHTSA.gov.
PE23011 · 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.
DP22005 · Pedestrian Alert Sounds
Opened Jan 27, 2023 · Closed Aug 7, 2023
Status: closed (inferred from source dates) · Electrical System:propulsion System
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.
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