Posts Tagged: U0140

U0140 code definition and possible causes

U0140 Lost Communication With Body Control Module A U0140 code is a generic (not manufacturer-specific) data network-related trouble code.  It is defined as: Lost Communication with Body Control Module (BCM). In lay language, that means the digital network can’t communicate with the body control module. A body control module (BCM) is an electronic control unit found in modern vehicles that manages various body-related functions and systems. It acts as a centralized computer that controls and monitors several convenience, safety, and security features in the vehicle. Most common causes of a … Read More