BMW DTC U113B – Lost Communication With Occupant Presence Belt Contact Status
DTC U113B meaning on BMW
The DTC U113B code on a BMW indicates a communication error with the Occupant Presence Belt Contact Status module. This module is responsible for detecting whether a seat belt is buckled or not, and it communicates this information to the vehicle’s computer system. When communication is lost with this module, the U113B code is triggered.
BMW DTC U113B symptoms
Symptoms of the DTC U113B code on a BMW may include:
- Malfunction indicator light (MIL) or check engine light illuminated on the dashboard
- Seat belt warning light may be on
- Loss of communication with the Occupant Presence Belt Contact Status module
BMW DTC U113B causes
The common causes of the DTC U113B code on a BMW are:
- Faulty Occupant Presence Belt Contact Status module
- Wiring or connection issues between the module and the vehicle’s computer
- Software glitches or communication errors
BMW DTC U113B seriousness
The DTC U113B code may not directly affect the drivability of the vehicle, but it is important for safety reasons. The Occupant Presence Belt Contact Status module plays a crucial role in ensuring that seat belts are properly buckled, which is essential for occupant safety in the event of a collision.
How to diagnose DTC U113B on BMW
To diagnose the DTC U113B code on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the wiring and connections to the Occupant Presence Belt Contact Status module
- Test the module itself for proper functionality
How to fix DTC U113B on BMW
To fix the DTC U113B code on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connections to the Occupant Presence Belt Contact Status module
- Replace the faulty module if necessary
- Clear the fault codes using a diagnostic scanner after the repairs have been made
How to erase DTC U113B on BMW
To erase the DTC U113B code on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Once the underlying issue has been addressed and fixed, the code can be erased to reset the system and turn off the malfunction indicator light.
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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