BMW DTC U1109 – Lost Communication With Torque Request Steering
DTC U1109 meaning on BMW
The Diagnostic Trouble Code (DTC) U1109 for BMW indicates a communication error with the Torque Request Steering system. This code is triggered when the control module is unable to establish communication with the Torque Request Steering module.
BMW DTC U1109 symptoms
Symptoms of DTC U1109 on a BMW may include:
- Loss of power steering assistance
- Steering wheel may feel heavier than usual
- Warning lights on the dashboard
- Difficulty steering the vehicle
BMW DTC U1109 causes
Common causes of DTC U1109 on a BMW include:
- Faulty Torque Request Steering module
- Wiring or connection issues
- Software glitches
BMW DTC U1109 seriousness
The seriousness of DTC U1109 on a BMW depends on the driving conditions and the extent of the communication failure. Loss of power steering assistance can significantly impact the drivability and safety of the vehicle, making it important to address this issue promptly.
How to diagnose DTC U1109 on BMW
To diagnose DTC U1109 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections to the Torque Request Steering module
- Check for any software updates or glitches
- Perform a communication test between control modules
How to fix DTC U1109 on BMW
To fix DTC U1109 on a BMW, the following steps may be taken:
- Repair or replace any faulty wiring or connections
- Update the software in the control modules
- Replace the Torque Request Steering module if necessary
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC U1109 on BMW
To erase DTC U1109 on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the system. After the repair has been completed and the underlying issue resolved, the fault codes can be cleared to reset the system and ensure that the warning lights do not reappear.
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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