BMW DTC U1845 – Universal Charger Extension Control Module Invalid Data Received From Drive Motor ‘B’ Control Module
DTC U1845 meaning on BMW
The Diagnostic Trouble Code (DTC) U1845 on a BMW indicates that there is invalid data received from the Drive Motor ‘B’ Control Module in the Universal Charger Extension Control Module. This means that there is a communication issue between the control modules related to the drive motor ‘B’.
BMW DTC U1845 symptoms
Symptoms of the BMW DTC U1845 may include:
- Check Engine Light (MIL) illuminated
- Reduced performance or power loss
- Issues with the charging system
- Erratic behavior of the drive motor ‘B’
BMW DTC U1845 causes
Possible causes of the BMW DTC U1845 include:
- Faulty Drive Motor ‘B’ Control Module
- Wiring or connection issues between control modules
- Software or programming errors
- Interference from other electronic components
BMW DTC U1845 seriousness
The seriousness of the BMW DTC U1845 depends on the underlying cause. Ignoring this DTC can lead to further damage to the drive motor ‘B’ or other related components. It is recommended to address this issue promptly to prevent potential safety hazards or more costly repairs.
How to diagnose DTC U1845 on BMW
To diagnose the DTC U1845 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the wiring and connections between the Universal Charger Extension Control Module and the Drive Motor ‘B’ Control Module
- Check for any visible damage or corrosion on the control modules
- Perform a software update or reprogramming if necessary
How to fix DTC U1845 on BMW
To fix the DTC U1845 on a BMW, consider the following:
- Replace the faulty Drive Motor ‘B’ Control Module if diagnosed
- Repair any damaged wiring or connections between the control modules
- Ensure all software and programming are up to date
- Clear the fault codes and perform a test drive to confirm the issue is resolved
How to erase DTC U1845 on BMW
To erase the DTC U1845 on a BMW, use a diagnostic scanner to clear the fault codes stored in the system. After fixing the underlying issue and ensuring all repairs are completed, perform a final scan to confirm the DTC U1845 has been successfully erased.
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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