DTC B1603-00: CAN Bus Off: General Description
WARNING: This page is about a different car, the 2024 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.
PTGM receives input from the vehicle information generated from other controllers via CAN communication.
If there is a fault with CAN communication data, PTGM can not operate correctly, causing CAN communication bus off when bus data fault of CAN communication caused.