U189D – BMW DTC

BMW DTC U189D – Drive Motor ‘B’ Control Module Invalid Data Received From ECM/PCM ‘A’

DTC U189D meaning on BMW

DTC U189D on a BMW indicates that the Drive Motor ‘B’ Control Module has received invalid data from the Engine Control Module/Powertrain Control Module ‘A’. This communication error can affect the proper functioning of the drive motor control system.

BMW DTC U189D symptoms

Symptoms of DTC U189D on a BMW may include:

• Check Engine Light illuminated
• Reduced power or performance
• Issues with acceleration
• Transmission shifting problems

BMW DTC U189D causes

Possible causes of DTC U189D on a BMW include:

• Faulty wiring or connections between the Drive Motor Control Module and the ECM/PCM
• Defective Drive Motor Control Module
• Faulty ECM/PCM
• Software issues

BMW DTC U189D seriousness

DTC U189D should be addressed promptly as it can lead to drivability issues and potential damage to the drive motor system. Ignoring this fault may result in further complications and increased repair costs.

How to diagnose DTC U189D on BMW

To diagnose DTC U189D on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes and freeze frame data
2. Inspect the wiring and connections between the Drive Motor Control Module and the ECM/PCM
3. Check for any visible signs of damage or corrosion
4. Perform a thorough inspection of the Drive Motor Control Module and ECM/PCM for any physical defects
5. Conduct a software update or reprogramming if necessary

How to fix DTC U189D on BMW

To fix DTC U189D on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connections
2. Replace the faulty Drive Motor Control Module if necessary
3. Address any issues with the ECM/PCM
4. Perform a software update or reprogramming to ensure proper communication between modules

How to erase DTC U189D on BMW

To erase DTC U189D on a BMW, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made and the issue resolved, the code can be cleared to reset the Check Engine Light and ensure that the fault does not reoccur.

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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