What Does the U0140 Code Mean? U0140 is a generic diagnostic trouble code (DTC) that stands for “Lost Communication With Body Control Module.” This code generally means that the BCM isn’t properly transmitting or receiving signals.
How do I fix trouble code U0140?
How to diagnose and repair U0140
- Perform a preliminary inspection. Sometimes U0140 can pop up intermittently, or it can result from a dead battery. …
- Check the battery. Proper battery voltage is essential to BCM operation. …
- Check for other DTCs. …
- Check for a faulty control module.
What does lost communication with ECM PCM?
Definition: Lost communication with engine control module/powertrain control module. Engine code U0100 means that your car can’t send messages between the ECM (engine control module) and the PCM (powertrain control module).
What is U0121 code?
What does OBD-II fault code U0121 mean? Code U0121 stands for Lost Communication with Anti-lock Brake System Module. Anti-lock brakes are required on all modern vehicles. The antilock braking system (ABS) prevents wheel lockup by modulating the brakes in an emergency situation.
How do you test a GM body control module?
Zitat von Youtube: Most body control module are located underneath the dashboard. Behind the glove box passenger side kick panel and sometime by the engine. Bay. Again use a scan tool and look for a u0140.
Can you reset a body control module?
To complete the body control module reset, you will have to reconnect the battery. This reestablishes the electrical supply through the BCM as well as other electrical peripherals of the vehicle. Once the battery is reconnected, check if the problems that made you perform the body control reset have been rectified.
How do I know if my BCM is bad?
A malfunctioning BCM will activate dashboard instrumentation cluster error and warning lights. These lights may flash off and on if the BCM is not able to read the sensors correctly. Your vehicle performance may also be affected as the BCM communicates with other control modules in the vehicle.
How do I reset my ECM?
Zitat von Youtube: Position to disconnect the positive battery cable. 3 wait 30 seconds for tap the positive terminal cable to the positive battery post. 3 times 5 reconnect the terminal cable 6 start the vehicle.
How do you reset the PCM?
There is an easy way to resolve this issue. Please see the following steps: Press and hold the PCM info button for approximately 10 seconds until the PCM reboots. Immediately select the following from the PCM CAR > OPTION > Set PCM System > Reset PCM > Vehicle Handover > Yes > Yes.
How do you fix an ECM failure?
Fortunately, these issues can usually be resolved by replacing the corroded wires. If one of the wires shorts out to the frame, the ECM may fail entirely. This can also happen due to power surges due to a lightning strike or arc welding on the vehicle frame. Installing a new starter can also cause ECM failure.
How do I fix code U0121 00?
Diagnosis
- Check the Anti-Lock Brake (ABS) Control Module and connections.
- If necessary, check for known ABS issues (faulty wheel speed sensor(s), etc.)
- Perform a PCM Scan Tool Data Listening Test to determine if there is an ABS exchange of information between modules.
What causes ABS control module to fail?
The most common ABS problems occur when sensors become contaminated with debris or metal shavings. Malfunctions also occur when sensor wiring becomes damaged, resulting in intermittent or no continuity.