What is the difference between CAN bus and OBD?

The main difference between CAN bus and OBD is their intended function. The CAN bus provides a way for the different components of a vehicle to communicate with each other and exchange data. This communication is essential for the proper functioning of the vehicle, as it enables different parts to coordinate with each other and respond to changing conditions. The OBD system, on the other hand, is primarily aimed at helping mechanics and technicians diagnose faults in the engine and other components.

Another difference between CAN bus and OBD is the amount of information that they provide. The CAN bus system provides a vast amount of data about the status and performance of different components in the vehicle. This information can be used to optimize the vehicle's performance, diagnose faults, and improve safety. The OBD system, however, is more focused on providing specific diagnostic information related to the engine and other systems.