Hi Sir\Mam I have receive 2018 model accent with customer complain abs,esp,EPs,check engine and traction control warning on cluster, this warning can out as per customer after he replace the engine battery this fault suddenly can out, initial diagnosis I have done was check all fuses all found OK, double check abs socket, and ecm socket all clean no loose connection, I have tried to calibrate the EPs it was successful but fault code still the same trouble code was esp auto recognition fail P1815, P0700 transmission control system and U0121 lost communication with abs module.

Anyone have encounter same problem kindly assist me on any further checks I need to perform thank you

Best regard Allen