BMW DTC U1117 – Message Monitoring Speed Alive Check
DTC U1117 meaning on BMW
DTC U1117 on a BMW refers to the Message Monitoring Speed Alive Check. This diagnostic trouble code indicates that there is a communication issue between the various control modules in the vehicle related to monitoring the speed signal.
BMW DTC U1117 symptoms
Symptoms of DTC U1117 on a BMW may include:
- Malfunction indicator light (MIL) illuminated on the dashboard
- Speedometer not working properly
- ABS or traction control warning lights may be illuminated
- Loss of communication with other vehicle systems
BMW DTC U1117 causes
Common causes of DTC U1117 on a BMW include:
- Faulty speed sensor
- Wiring or connection issues in the speed sensor circuit
- Defective control module
- Interference from other electronic devices
BMW DTC U1117 seriousness
The seriousness of DTC U1117 on a BMW depends on the underlying cause. Ignoring this code can lead to potential safety issues, such as loss of speedometer functionality or compromised ABS and traction control systems. It is recommended to address this code promptly to ensure the vehicle’s proper operation.
How to diagnose DTC U1117 on BMW
To diagnose DTC U1117 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
- Inspect the speed sensor and its wiring for any visible damage or corrosion.
- Check the connections between the speed sensor and the control module for proper continuity.
- Perform a visual inspection of other related components for any signs of wear or damage.
How to fix DTC U1117 on BMW
To fix DTC U1117 on a BMW, consider the following:
- Replace the faulty speed sensor if it is determined to be the cause of the issue.
- Repair any damaged wiring or connections in the speed sensor circuit.
- If a defective control module is identified, replace it with a new one.
- Ensure that all connections are secure and free of corrosion.
How to erase DTC U1117 on BMW
To erase DTC U1117 on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After addressing the underlying issue causing the code, perform a test drive to ensure that the code does not return. If the problem persists, further diagnosis may be required.
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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