DTC B336: Loss Of IPC Serial Data: Description

Code B336 will set if the ignition is turned to ON position and the BCM loses data communication with the IPC. The problem is a result of a +7 volt power or ground fault to the IPC, or a double open circuit in the data communication line between the IPC and the BCM. If this occurs, the cruise control will disengage (if on) and the headlamps (if on) will be on low beams.