What does it mean?
This code is concerned with the communications circuit between control modules throughout the vehicle. This communications circuit is most often referred to as Controller Area Network bus communications, or simply put, CAN bus. Without this CAN bus, control modules cannot exchange information, and in some cases, your scan tool may not be able to communicate with the vehicle, depending on which of these CAN circuits is affected.
For this particular code, the communication circuit we will be working with is CAN C, which may also be referred to as under-hood or under-vehicle CAN bus, as the modules that typically communicate on this network can be found under-hood or under-car. What is causing this code to set is one main module has the task of communicating with other modules on CAN C to make sure they all report in. This “main module” could be the Body Computer or a Central Gateway Module, depending on the vehicle.
For this particular code to set, most often the Anti-Lock Brake (ABS) Controller at some point in time did not “check in”. Usually this code will set only as a history / memory code. If it is active or present right now, then you probably will not be able to access ABS codes or data. This code is possible to be set for other modules on CAN C bus, depending upon the vehicle manufacturer.