BMW DTC U0138 – Lost Communication with All Terrain Control Module
DTC U0138 meaning on BMW
The Diagnostic Trouble Code (DTC) U0138 for BMW indicates a communication error between the vehicle’s control module and the All Terrain Control Module. This error typically means that the control module is unable to establish communication with the All Terrain Control Module, which can lead to various issues related to the vehicle’s traction control and stability systems.
BMW DTC U0138 symptoms
Symptoms of the DTC U0138 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Stability control system not functioning properly
- Possible loss of traction or stability while driving
BMW DTC U0138 causes
The most common causes of the DTC U0138 on a BMW include:
- Faulty wiring or connectors between the control module and the All Terrain Control Module
- Defective All Terrain Control Module
- Interference from other electronic components
BMW DTC U0138 seriousness
The DTC U0138 should be addressed promptly as it can affect the proper functioning of the vehicle’s traction control and stability systems. Ignoring this issue may lead to compromised safety while driving, especially in adverse road conditions.
How to diagnose DTC U0138 on BMW
To diagnose the DTC U0138 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the specific error code
- Inspect the wiring and connectors between the control module and the All Terrain Control Module for any damage or loose connections
- Check for any other related error codes that may provide additional clues
How to fix DTC U0138 on BMW
To fix the DTC U0138 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connectors between the control module and the All Terrain Control Module
- If the All Terrain Control Module is faulty, it may need to be replaced
- Clear the error code and perform a test drive to ensure the issue has been resolved
How to erase DTC U0138 on BMW
To erase the DTC U0138 on a BMW, a mechanic can use a diagnostic scanner to clear the error code from the vehicle’s system. Once the issue has been fixed and the error code erased, the vehicle should be tested to ensure that the problem has been successfully resolved.
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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