DTC P0601-00: Internal Control Module Memory Check Sum Error: General Description
WARNING: This page is about a different car, the 2018 Hyundai Accent. However, it is still accessible from the selected car via links, so may be relevant.
If the checksum value of internal defect obtained through internal calculation is incorrect, PCM/TCM judges it as malfunction. In order to monitor whether numerous calculation values are accurate or not, PCM/TCM monitors a data error through the constant sum of each value.