2023 HYUNDAI IONIQ 5 Complaints

On 11/7/25 , we were driving my 2023 Hyundai Ioniq 5 to a friend's home in rural [XXX] , a trip of approximately 160 miles. At around 5:00 PM, we stopped about halfway to our destination to charge the battery. The car would not charge above 47%. While we continued to attempt to charge the battery, the console displayed a Check Electrical System Warning message, and we received the DTC P1AA700 via BlueLink. We were concerned about our safety on the drive up to the mountains. We were afraid the car would stop running on the highway and cause an accident. We were also concerned the car would die in a remote area and we would be stranded. However, the dealership was closed for the weekend. We drove carefully to our friend's home. I contacted Stevens Creek Hyundai on 11/10/25 and arranged to bring the car in on 11/11/25. It had 13,652 miles on it at that time. Eventually, the dealer confirmed the DTC P1AA700 and said they would need to order a new EGMP battery. The car was in the shop for 128 days, waiting for Hyundai to "build a battery" in [XXX] . Eventually, Stevens Creek Hyundai replaced the EV battery and I picked up the car. Given the delay in repairing my car and the growing evidence of Hyundai battery failures, we wanted to report this problem to the authorities. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving the vehicle, the ICCU failed. The vehicle shut down in the middle of traffic without any warnings.

Failure of Integrated Charge Control Unit (ICCU). Vehicle stopped charging 12V service battery from main high voltage battery. Displayed "Check Electric Vehicle System" followed by "Stop vehicle and check power supply". Vehicle to operate normally though Cruise Control stopped working. Continued to drive the few miles to our home. Once home checked service battery with battery monitor. Showed 12.1V and did not show battery being charged with vehicle ON (Ready) or OFF. Had vehicle towed to Hyundai service facility where the ICCU failure was confirmed.

I am writing to notify you of an Integrated Charging Control Unit (ICCU) failure on my 2023 Hyundai Ioniq 5, purchased in October of 2023. While driving home on March 4 2026, the dashboard displayed the warning "Check vehicle electrical system," and then a "pull over safely" warning. I had to leave the vehicle in a parking lot and walk home. It was towed to a dealer on March 5, 2026 to diagnose and repair the problem. The car has just under 17000 miles on it. I was told the dealer was swamped with Ioniqs with this problem and had no ETA for parts. Fortunately they will be able to repair our car next week. Hyundai claims the replacement part has been redesigned to address the problem. Interestingly, I'm reading that Hyundai has issued a recall for some vehicles of this make and model year for this very serious issue; mind bogglingly we received no such notice.

On Mar 29th, I got a 12v battery low voltage warning sign at 4pm. Jumpstarted the car and drove back to the home. On Mar 30th, car would not start so I had it towed to Downey Hyundai by roadside assistance. On Mar 30th, 12:41pm dealer confirmed that the it will need an "ICCU" and have ordered the part, but there are no loaners and no ETA for the part at this time. Problem has been reproduced and confirmed by dealer. There were no other warning signs prior to the failure.

My vehicle lost power as I was driving after warnings from the electrical system. The vehicle was towed to a Hyundai dealership where it was diagnosed with ICCU failure. The ICCU system was replaced by dealer.

Car lost charge quickly, went into limp mode while I was driving on the highway. I had to pull of the road several times and try to get it to a charging station. It barely made it after the lose of power. Charged it to 80% and it would only go up to a range of 100 miles. Took it to the dealership and they confirmed it needed a whole new main battery. ICCU had already been replaced. Had to wait over 5 months for replacement parts.

My 2023 Ioniq 5 had the ICCU replacedin 2025 and then it failed again in late January 2026. The car has been at the dealership since then awaiting a new part.

The ICCU unit malfunctioned and needed to be replaced. It occurred while I was driving home and I was lucky enough to make it to my driveway. If it had been on the freeway I would have been stuck.

2023 Hyundai Ioniq 5 displayed a "Check Vehicle Electrical System" warning on the dashboard. The Integrated Charging Control Unit(ICCU) failed, and it rendered the car inoperable. I could not drive it and was left stranded, waiting for a tow truck in below-freezing temperatures as the car completely died. Hyundai has previously recalled the vehicle for this, and my car had been serviced in the recall campaign, so the issue is clear: the recall did not fix this issue. The car has been sitting at the service center for two weeks, waiting in the repair queue behind other Ioniq 5 cars with the same ICCU failure.