“The body module is not communicating” is useful information, but it is not yet an identification of the faulty part. Modern vehicles can distribute body functions across several controllers. A scan-tool label, a parts-catalogue name and the wording on a casing may differ.
Read the complete description
HELLA lists U0141 through U0145 as communication losses involving body controllers A through E. That lettering is a generic naming scheme, not a universal map to a particular box. BSI terminology also depends on the vehicle manufacturer and system. Generic U-code reference.
Describe functions individually
Explain whether central locking, wipers, interior lights, windows and starting are affected together or separately. A working function is worth recording too. It helps the workshop avoid treating a whole group of symptoms as one assumed module failure.
- Supply a full vehicle scan, not just a photograph of one code.
- State which controller stored the code and whether the named body module can be accessed directly.
- Record rain, water leaks, battery discharge and earlier electrical modifications.
- Photograph the module label if already accessible without dismantling.
- Keep the original unit and its connectors available for assessment.
Replacement and programming
Two units with similar housings are not automatically interchangeable. Before purchasing a donor, ask the workshop to check the exact hardware and software identification and the required configuration route. A successful data transfer is not evidence that the vehicle wiring is sound, and coding cannot repair a corroded supply connection.
There is no single battery-disconnection or “BSI reset” sequence suitable for all vehicles. Use the exact manufacturer’s procedure. Build a vehicle enquiry and browse body-module guides.
Reviewed September 2026. Use the complete manufacturer-specific fault description and vehicle repair information.