If you have Hyundai Genesis G70 ECU lable : SIM2K- 260 Kefico MCU: TC1793
And you try to read flash data , you have to watch unlocking ECU procedure step, from first try of programmer trying to read data ( led's of power module flashing ) if it failed to unlock , then you have to stop Reading porcedure , Cause repeating the operation will lead to brick the ECU and you get MESSAGE ( Error while processing Ref - 9cb ) this mean you have to replace the ECU,
And Microtronic wiring page not noted this to warn us before we make read operation, I faced this problem and would like to share with others to be warned.
Greetings

These ECUs can be read and written without any issues. Please note that the 9CB error occurred due to a password recognition issue between the ECU and the tool. This error does not pose any risk of damage or bricking to the ECU. It is unrelated to ECU bricking, and repeated operations will not cause any harm.