The U0140 fault code indicates a loss of communication with the Body Control Module (BCM). The BCM is responsible for controlling various electrical components in the vehicle, such as the power windows, locks, and lighting.

Code U0140 pertains to the BCM or the wiring to the BCM from the engine control module (ECM). The code, depending on the year, make and model of the vehicle, may mean that the BCM is bad, that the BCM is not receiving or sending a signal, the BCM harness has an open or short, or that the BCM is not communicating with the ECM via the controller ...

2016年12月30日 · The u1040 is loss of communication between the body control module and engine control module. Looks like you've either pulled a connection apart or have blown a fuse. A bad ground on any of those modules will also cause the same problem. Have you messed with any of the wires or connections? Where do do I start to clean that ground?

The U0140 code for Chevrolet vehicles indicates that there has been a communication failure between the Engine Control Module (ECM) and the Body Control Module (BCM). The Body Control Module is responsible for managing various functions related to the vehicle's body, such as lighting, door locks, and security systems.

2024年12月19日 · The U0140 code stands for “Lost Communication With Body Control Module (BCM)”, which usually means the BCM isn’t properly transmitting or receiving signals from various switches and sensors in your vehicle. Damaged wires, BCM internal hardware failure, and data network problems are some common causes of the U0140 code.

2024年9月15日 · The U0140 code often shows up in vehicles made by GM, Ford, Chrysler, and Toyota. When this code appears, you might see problems with the locks, lights, and other electrical parts because the Body Control Module (BCM) isn’t communicating properly.

If DTC U0140 sym00 or U0073 sym71 is set in any of the high speed modules, refer to "Testing for Electrical Intermittents" in the service manual to reset the DTC and diagnose the location of the fault. Do NOT replace the BCM until normal diagnostics are performed.

U0140 symptoms. Illuminated warning lights; BCM-related performance issues; Get it diagnosed by a professional. Find a shop in your area. Common causes for U0140. Code U0140 is typically caused by one of the following: A dead battery; A faulty BCM; A problem with BCM circuit; A problem with the CAN bus; How to diagnose and repair U0140 Perform ...

2020年6月29日 · Code U0140 Chevrolet Description. Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules.

If you come across the U0140 code in your vehicle, understanding its implications is important for addressing potential communication issues between the main computer and the Body Control Module (BCM). Diagnostic procedures are essential to pinpoint the root cause of this code.