What is code u32bb on 2003 caddy cst

Question

2003 caddy have had tons of problems!drive for day or two all fine,then transmission won't go in gear manager motor nearly runs,and I just got code u32bb out of it? Help

Answer 1

U32BB this is a universal code not for the vehicle but the scan tool , when the scan tool is connected to the DLC connection it ask to become the host, there the ECM responds by giving it a communication speed or protocol. Your scan tool responded there they exchange information. Your scan tool matches information in its library, U32BB this means incorrect format. , depends on which  computer set this is the one at fault.