TSB: Kia High Voltage Battery Coolant Valve

This bulletin details the inspection and replacement procedures for the high voltage battery cooling system's 3-way valve in certain 2025 Kia EV6 models built between August 21, 2024, and July 7, 2025, due to potential communication issues indicated by DTC U112800.

Kia High Voltage Battery Coolant Valve

This bulletin applies to 2025 Kia EV6 vehicles, regarding inspection and replacement of the high voltage battery cooling system 3-way valve on certain vehicles built from August 21, 2024 through July 7, 2025 which may display a MIL on and DTC U112800 (lost communication with hybrid/EV battery electronic coolant valve “A”) due to a voltage deviation within the 3-way valve. There are no drivability issues associated with this condition. If this DTC is set, replace the 3-way valve following steps outlined in the service manual.

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