U189E – BMW DTC

BMW DTC U189E – Drive Motor ‘B’ Control Module Lost Communication with ECM/PCM ‘A’

DTC U189E meaning on BMW

DTC U189E on a BMW indicates that the Drive Motor ‘B’ Control Module has lost communication with the Engine Control Module/Powertrain Control Module ‘A’. This means that there is a communication error between these two crucial modules in the vehicle’s electronic system.

BMW DTC U189E symptoms

Symptoms of DTC U189E on a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Transmission shifting issues
• Vehicle going into limp mode

BMW DTC U189E causes

Common causes of DTC U189E on a BMW include:

• Faulty wiring or connectors between the Drive Motor Control Module and the ECM/PCM
• Defective Drive Motor Control Module
• Faulty ECM/PCM
• Interference from other electronic components

BMW DTC U189E seriousness

The seriousness of DTC U189E on a BMW depends on the underlying cause. Ignoring this fault can lead to further damage to the vehicle’s drivability and performance. It is recommended to address this issue promptly to prevent any potential safety hazards or long-term damage.

How to diagnose DTC U189E on BMW

To diagnose DTC U189E on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes and freeze frame data
2. Inspect the wiring and connectors between the Drive Motor Control Module and the ECM/PCM for any damage or loose connections
3. Check for any other related fault codes that may provide additional information
4. Perform a communication test between the modules using a diagnostic tool

How to fix DTC U189E on BMW

To fix DTC U189E on a BMW, consider the following steps:

1. Repair or replace any damaged wiring or connectors between the Drive Motor Control Module and the ECM/PCM
2. If the Drive Motor Control Module is faulty, replace it with a new one
3. If the ECM/PCM is faulty, have it repaired or replaced by a professional
4. Clear the fault codes and perform a test drive to ensure the issue has been resolved

How to erase DTC U189E on BMW

To erase DTC U189E on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault codes stored in the vehicle’s memory
2. Perform a test drive to ensure the fault codes do not reappear
3. If the fault codes return, further diagnosis may be required to address the underlying issue

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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