Good morning, I have made a diagnosis with Flex on a Veloster that has automatic transmission, sometimes inserting D or reverse gear the car does not move, I switch off and insert D or reverse gear again and the car moves. the dtc that I find with flex are as follows:

ERRORS PRESENT AT THE BEGINNING OF THE COMMUNICATION
P1786 MEM
P1786 ATT
U1103 ATT

can you help me with the error description ? thank you
HYUNDAI PETROL
VELOSTER (FS) 1.6 GDI