GM
Type:
    Network - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Loss of XXX Communications Conditions
Cause:
    DTC B1327, B1328, U1300, U1301 and U1305 not set (any one of the devices on the Class 2 serial data circuit will support some subset of these codes), the ignition switch position requires serial data communication to occur, then a message from a learned identification number was not detected for the past 5 seconds

Infiniti
Type:
    Network - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    CAN communication line - signal malfunction
Cause:
    Wiring