BMW DTC U0139 – Lost Communication With Suspension Control Module ‘B’
DTC U0139 meaning on BMW
DTC U0139 on a BMW indicates a communication error between the vehicle’s main control module and the suspension control module ‘B’. This error code signifies that the main control module has lost communication with the suspension control module ‘B’, leading to potential issues with the suspension system’s operation.
BMW DTC U0139 symptoms
Symptoms of DTC U0139 on a BMW may include:
- Warning lights on the dashboard related to the suspension system
- Abnormal suspension behavior, such as a harsh ride or uneven ride height
- Loss of suspension adjustment functionality
BMW DTC U0139 causes
Common causes of DTC U0139 on a BMW include:
- Faulty wiring or connectors between the main control module and suspension control module ‘B’
- Defective suspension control module ‘B’
- Software issues within the control modules
BMW DTC U0139 seriousness
The seriousness of DTC U0139 on a BMW depends on the extent of the communication loss between the main control module and the suspension control module ‘B’. Ignoring this issue can lead to potential safety concerns and compromised suspension performance.
How to diagnose DTC U0139 on BMW
To diagnose DTC U0139 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the vehicle’s control modules
- Inspect the wiring and connectors between the main control module and suspension control module ‘B’ for any damage or corrosion
- Check the suspension control module ‘B’ for proper functionality and communication
- Perform a software update or reprogramming of the control modules if necessary
How to fix DTC U0139 on BMW
To fix DTC U0139 on a BMW, consider the following solutions:
- Repair or replace any damaged wiring or connectors between the main control module and suspension control module ‘B’
- Replace the suspension control module ‘B’ if it is found to be faulty
- Perform a software update or reprogramming of the control modules to ensure proper communication
How to erase DTC U0139 on BMW
To erase DTC U0139 on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s control modules. After addressing the underlying issue causing the communication error, clear the DTC U0139 code to reset the system and ensure proper operation.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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