BMW DTC U0173 – Lost Communication With ‘Restraints System Sensor D’
DTC U0173 meaning on BMW
DTC U0173 on a BMW indicates a communication error between the vehicle’s control module and the Restraints System Sensor D. This error code signifies that the control module has lost communication with the sensor, leading to potential issues with the vehicle’s restraint system.
BMW DTC U0173 symptoms
Symptoms of DTC U0173 on a BMW may include the airbag warning light illuminating on the dashboard, potential loss of functionality in the restraint system, and in some cases, the vehicle may go into a limp mode to prevent further damage.
BMW DTC U0173 causes
The causes of DTC U0173 on a BMW can vary, but common reasons include a faulty Restraints System Sensor D, damaged wiring or connectors leading to poor communication, or issues with the control module itself.
BMW DTC U0173 seriousness
DTC U0173 should be taken seriously as it directly affects the proper functioning of the vehicle’s restraint system, which is crucial for occupant safety in the event of a collision. Ignoring this error code can compromise the effectiveness of the airbags and other safety features.
How to diagnose DTC U0173 on BMW
To diagnose DTC U0173 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the specific fault codes stored in the vehicle’s control module. They would then inspect the wiring and connectors associated with the Restraints System Sensor D to check for any visible damage or loose connections.
Additionally, conducting a thorough visual inspection of the sensor itself and performing continuity tests on the wiring can help pinpoint the source of the communication error.
How to fix DTC U0173 on BMW
Fixing DTC U0173 on a BMW may involve replacing the faulty Restraints System Sensor D, repairing any damaged wiring or connectors, or reprogramming the control module to establish proper communication. It is essential to follow manufacturer guidelines and use OEM parts to ensure the effectiveness of the repair.
How to erase DTC U0173 on BMW
Once the underlying issue causing DTC U0173 on a BMW has been addressed and fixed, the error code can be cleared using a diagnostic scanner. By accessing the vehicle’s control module and selecting the option to clear fault codes, the DTC U0173 should be erased from the system, provided the repair was successful.
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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