BMW DTC U1118 – Lost Communication With Speed
DTC U1118 meaning on BMW
DTC U1118 on a BMW indicates a ¨Lost Communication With Speed¨ fault. This diagnostic trouble code (DTC) is triggered when the vehicle’s control module is unable to communicate with the speed sensor or speed sensor circuit.
BMW DTC U1118 symptoms
Symptoms of DTC U1118 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Speedometer not functioning correctly
- Erratic or incorrect speed readings
BMW DTC U1118 causes
Common causes of DTC U1118 on a BMW include:
- Faulty speed sensor
- Wiring or connection issues in the speed sensor circuit
- Defective control module
- Interference from other electronic components
BMW DTC U1118 seriousness
The seriousness of DTC U1118 on a BMW depends on the driving conditions and the extent of the communication loss with the speed sensor. While the vehicle may still be operable, the loss of communication with the speed sensor can affect the proper functioning of safety systems like ABS and traction control.
How to diagnose DTC U1118 on BMW
To diagnose DTC U1118 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the speed sensor and its wiring for any visible damage or corrosion
- Check the connections between the speed sensor and the control module
- Perform a continuity test on the speed sensor circuit
How to fix DTC U1118 on BMW
To fix DTC U1118 on a BMW, the following steps may be taken:
- Replace the faulty speed sensor if it is determined to be the cause
- Repair any damaged wiring or connections in the speed sensor circuit
- Reset the fault codes and perform a test drive to ensure the issue is resolved
- If the problem persists, further diagnosis may be required to identify the root cause
How to erase DTC U1118 on BMW
To erase DTC U1118 on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s control module. After the codes are cleared, it is recommended to perform a test drive to confirm that the issue has been resolved and the fault code does 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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