BMW DTC U0249 – Lost Communication With Entertainment Control Module (Rear ‘B’)
DTC U0249 meaning on BMW
The Diagnostic Trouble Code (DTC) U0249 for BMW indicates a communication error between the vehicle’s control module and the Entertainment Control Module (Rear ‘B’). This error suggests that the control module is unable to establish communication with the specified entertainment module, leading to potential issues with the entertainment system’s functionality.
BMW DTC U0249 symptoms
Symptoms associated with the BMW DTC U0249 may include:
- Loss of functionality in the rear entertainment system
- Display screen not working properly
- No sound output from the rear speakers
- Error messages related to the entertainment system
BMW DTC U0249 causes
The potential causes of the BMW DTC U0249 include:
- Loose or damaged wiring connections between the control module and the entertainment module
- Faulty entertainment control module
- Software issues within the control module
BMW DTC U0249 seriousness
While the BMW DTC U0249 may not directly affect the drivability of the vehicle, it can impact the convenience and functionality of the entertainment system. Addressing this issue is important to ensure all vehicle systems are operating as intended.
How to diagnose DTC U0249 on BMW
To diagnose the DTC U0249 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the specific fault code
- Inspect the wiring connections between the control module and the entertainment module for any damage or looseness
- Check for any visible signs of damage on the entertainment control module
- Perform a software update on the control module if necessary
How to fix DTC U0249 on BMW
To fix the DTC U0249 on a BMW, consider the following actions:
- Repair or replace any damaged wiring connections between the control module and the entertainment module
- Replace the entertainment control module if it is found to be faulty
- Update the software on the control module to the latest version
How to erase DTC U0249 on BMW
To erase the DTC U0249 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s system memory. Once the issue has been addressed and fixed, clearing the code will reset the system and remove the error message.
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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