BMW DTC U1187 – Lost Communication With Engine Data Group 2
DTC U1187 meaning on BMW
The Diagnostic Trouble Code (DTC) U1187 on a BMW indicates a communication error between the vehicle’s Engine Control Module (ECM) and Data Group 2. This error typically means that the ECM is unable to receive or transmit data from or to the specified data group within the vehicle’s network.
BMW DTC U1187 symptoms
Symptoms of the DTC U1187 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Loss of engine performance
- Erratic engine operation
- Difficulty starting the vehicle
BMW DTC U1187 causes
Common causes of the DTC U1187 on a BMW include:
- Faulty wiring or connectors in the communication network
- Defective Engine Control Module (ECM)
- Interference from other electronic components
- Software issues within the ECM
BMW DTC U1187 seriousness
The seriousness of the DTC U1187 on a BMW depends on the underlying cause. Ignoring this code can lead to further engine performance issues and potential safety concerns. It is recommended to address this code promptly to prevent any further damage to the vehicle.
How to diagnose DTC U1187 on BMW
To diagnose the DTC U1187 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connectors in the communication network
- Check for any loose connections or damaged components
- Test the ECM for proper functionality
- Verify the software version in the ECM
How to fix DTC U1187 on BMW
To fix the DTC U1187 on a BMW, the following steps may be taken:
- Repair or replace any faulty wiring or connectors
- Replace the Engine Control Module (ECM) if necessary
- Address any interference from other electronic components
- Update the software in the ECM to the latest version
How to erase DTC U1187 on BMW
To erase the DTC U1187 on a BMW, the fault codes can be cleared using a diagnostic scanner. After addressing the underlying issue and fixing the problem, the codes can be cleared to reset the Check Engine Light and ensure that the issue 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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.