BMW DTC U117E – Lost Communication With Starter Generator
DTC U117E meaning on BMW
The Diagnostic Trouble Code (DTC) U117E for BMW indicates a communication error between the vehicle’s control module and the starter generator. This code is specifically related to a lost communication issue with the starter generator system.
BMW DTC U117E symptoms
Symptoms of the DTC U117E on a BMW may include:
- Engine not starting
- Intermittent starting issues
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced power or performance
BMW DTC U117E causes
The potential causes of the DTC U117E on a BMW include:
- Wiring or connection issues between the control module and the starter generator
- Faulty starter generator
- Defective control module
- Software glitches or programming errors
BMW DTC U117E seriousness
The DTC U117E is a serious issue as it directly affects the starting and power generation system of the vehicle. Ignoring this code can lead to potential starting problems and may result in the vehicle being inoperable.
How to diagnose DTC U117E on BMW
To diagnose the DTC U117E on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections related to the starter generator system
- Test the starter generator for proper functionality
- Check the control module for any faults or errors
How to fix DTC U117E on BMW
To fix the DTC U117E on a BMW, the following steps may be taken:
- Repair any damaged wiring or connections in the starter generator system
- Replace the faulty starter generator if necessary
- Address any issues with the control module by repairing or replacing it
- Update the software or reprogram the control module if needed
How to erase DTC U117E on BMW
To erase the DTC U117E on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made to address the underlying issue, the codes can be reset to see if the problem has been resolved.
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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