P1790 BUICK, CADILLAC, CHEVROLET, GMC: TRANSMISSION CONTROL MODULE CHECKSUM
POST UPDATED IN May, 2023
P1790 BUICK, CADILLAC, CHEVROLET, GMC: TRANSMISSION CONTROL MODULE CHECKSUM
The Transmission Control Module (TCM) is responsible for checking the proper operation of the transmission, including the actuators and sensors that provide important information to the transmission
All operating data is sent over the CAN bus (Controller Area Network), a system by which the automotive controllers and microprocessors share information from the devices they control
The P1790 OBDII fault code is a code applied by manufacturers such as Chevrolet, GMC, Cadillac, and others, to indicate that the Transmission Control Module has found discrepancies between the calculated checksum data and the obtained checksum data.
The reasons why the DTC P1790 OBD2 is set are:
The steps to follow to correct the P1790 OBDII diagnostic code are: