NHTSA Complaint #11716738 — 2024 KIA EV6

While operating my 2024 Kia EV6, the vehicle began displaying repeated warnings related to the power system and 12-volt battery. The instrument cluster first showed a “Power limited” message, followed shortly by a “Stop vehicle and check power supply” warning. At the same time, the vehicle indicated that the 12-volt battery was low, despite the high-voltage traction battery being at or near full charge. Shortly thereafter, the 12-volt battery became fully depleted, resulting in a complete loss of low-voltage electrical power. I was unable to electronically unlock the doors, and the vehicle could not be started or shifted into gear. The vehicle became immobilized and inoperable, requiring towing. This failure occurred without warning and created a safety concern, as loss of power could potentially occur while driving or leave occupants stranded and unable to access the vehicle. The vehicle had previously been serviced at a Kia dealership for known power system concerns related to the Integrated Charging Control Unit (ICCU). During that visit, the dealership applied a firmware update only and did not replace the ICCU hardware. The current failure occurred after that firmware update, suggesting the issue was not resolved. This incident represents a loss of motive power and loss of vehicle electrical systems, which could present a serious safety risk if it occurs while the vehicle is in motion or in unsafe environments. The inability to unlock doors or start the vehicle due to complete 12-volt battery depletion is particularly concerning. When roadside assistance arrived to tow the vehicle to the dealership, the vehicle’s 12-volt battery was completely depleted, preventing normal recovery procedures. A portable jump starter was temporarily connected, but the vehicle would not remain powered on long enough to complete the steps required to place the vehicle into neutral or tow mode.