Lost Communication With Entertainment Control Module - Rear B

Where it lives

For U0249, the part to look at first is the module named here.

Check these first

• Damaged wiring between rear entertainment control module B and the main computer
• A failed rear entertainment control module B
• A software fault in the module
• Electrical interference from another system

What to do next

1. Full scan to confirm rear entertainment module B is missing
2. Inspect the module wiring and connectors
3. Check for electrical interference from other systems
4. Update or reflash the module software
5. Replace rear entertainment control module B if faulty
6. Clear the code and retest

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