2022 Hyundai Ioniq 5 electrical system problems

“The Integrated Charging Control Unit (ICCU) has failed repeatedly on this vehicle. It has been replaced three times by Haselwood Hyundai dealer since the vehicle was purchased new in 2021. Dates: 9/8/2023, 12/19/2024, 9/30/2025 at approximately 17k, 35k, and 50k miles. Each failure presents the same way: the ICCU stops charging the 12V battery from the high-voltage pack, the 12V drains, and warning messages appear on the dash: Check Electric Vehicle System. The vehicle then loses power or will not start and becomes inoperable [on numerous occasions the vehicle lost power/would not start at, leaving family occupants stranded. The vehicle also required jump starts on at least 25 occasions. Safety risk: an ICCU failure can disable the vehicle without meaningful warning. A loss of 12V power affects power steering assist, braking assist, hazard lights, and airbag readiness, and has left us stranded away from home as the car has to be jumped every time. Each failure was diagnosed and confirmed by a Hyundai dealer, which replaced the ICCU under warranty. Repair orders documenting all three replacements are available on request; the replaced units were retained by the…”

“The Integrated Charging Control Unit (ICCU) in my 2022 Hyundai IONIQ 5 failed while the vehicle was charging. The vehicle had been connected to a Level 1 charger for a multi-day charging session when it unexpectedly stopped charging before reaching the selected charge limit. After the failure, the vehicle could no longer successfully charge using either Level 1 or Level 2 charging. When connected to a charger, the vehicle would initially appear to begin charging, but charging would then stop and the dashboard would display an electrical-system warning instructing me to inspect the vehicle’s electrical system. There was no warning or indication of an impending ICCU failure before this occurred. This created a significant reliability and safety concern because the vehicle effectively lost its ability to AC charge. Had I driven to a destination expecting to recharge there without realizing the charging system had failed, I could have been stranded without sufficient range to continue driving. I brought the vehicle to a Hyundai dealership, where technicians diagnosed the problem as an ICCU failure. The dealership subsequently replaced the ICCU. My vehicle had…”

“We had a previous issue with our 12V battery not charging, which totally bricked the whole car. Hyundai updated the charge management system software under the active recalls and tested the 12V battery, which after it was fully charged they said was fine. Now (a few months outside our warranty period for the 12v battery), our car was bricked again and was so dead that we could not even start it/charge the battery with a jump start kit. We were stranded on the side of the road (where we had parked for an event we were attending) and the next day Hyundai towed the car to the nearest dealer (3 hours away). It took a week for them to even look at our car and diagnose it. When they did, they said the 12v battery had "just died" because "it was old". There were zero warnings about the 12v battery not charging before it died. There were zero DTC codes. They refused to replace the battery under any warranty/the previous recall and we ended up paying out of pocket. The more concerning thing is that they claimed "nothing is wrong with the charge management system" which is clearly not the case. Even older 12V batteries don't just die after leaving them for a few hours -…”

“Active powertrain failure on my 2022 Ioniq 5 SE, which poses an immediate and severe safety risk. On May 18, 2026, the vehicle suffered a catastrophic loss of power and a complete failure to charge. At Murdock Hyundai of Lindon, technicians diagnosed it with trouble code P1AA600 and recommended a total high-voltage battery pack replacement at a cost of over $44,000. Immediate Fire & Safety Risk: The dealership technician explicitly warned me that if I continue to attempt to drive or plug in the vehicle, it will cause an electrical fire. Visible Electrical Arcing: The service technician stated that they physically witnessed an electrical arc occur when connecting the vehicle's high-voltage charging components. The technician's diagnosis strongly points to a catastrophic internal short circuit or a failed Power Relay Assembly (PRA) within the high-voltage housing. The company completely stopped working and Hyundai would not help. This has been an ongoing issue with other cars too. I tried multiple times working with both the deal and Hyudnai.”

“While driving 70mph on the highway in Phoenix, multiple emergency lights illuminated on the dashboard and I lost all control over the steering wheel and braking mechanisms. The car has been serviced regularly with multiple check-ins focusing on battery efficiency.”

“On June 3, 2026, my 2022 Hyundai Ioniq 5 SE Dual Motor AWD (approximately 31,000 miles) experienced a sudden and severe high-voltage battery failure. Prior to complete failure, I noticed “Check Electrical” warning sign occurring simultaneously: a sudden and dramatic drop in driving range, dashboard warning lights illuminating, and the vehicle failing to charge properly at both home and public charging stations. The vehicle was still drivable at the time I brought it to an authorized Hyundai dealership, but displayed serious warnings indicating the HV battery system was critically compromised. Upon inspection, the dealership confirmed the main high-voltage battery had failed and required full replacement. The dealership has advised that the repair will take several months due to parts availability. This failure is not an isolated incident. Hyundai issued a recall covering 2022–2024 Ioniq 5 models for HV battery and charging system defects (including ICCU failure). My vehicle’s failure is consistent with this known defect pattern. Despite the vehicle being subject to this known systemic issue, Hyundai Motor America has declined to offer a goodwill buyback, and my…”