BMW DTC U1872 – Drive Motor ‘B’ Control Module Lost Communication With Drive Motor ‘A’ Control Module
DTC U1872 meaning on BMW
DTC U1872 on a BMW indicates that the Drive Motor ‘B’ Control Module has lost communication with the Drive Motor ‘A’ Control Module. This communication error can occur due to various reasons, leading to potential issues with the hybrid drive system of the vehicle.
BMW DTC U1872 symptoms
Symptoms of DTC U1872 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Hybrid drive system malfunction warning
- Reduced power or performance
- In some cases, the vehicle may go into a limp mode
BMW DTC U1872 causes
The possible causes of DTC U1872 on a BMW include:
- Faulty Drive Motor ‘A’ Control Module
- Faulty Drive Motor ‘B’ Control Module
- Wiring or connection issues between the control modules
- Software communication errors
BMW DTC U1872 seriousness
DTC U1872 should be addressed promptly as it can affect the proper functioning of the hybrid drive system in the BMW. Ignoring this fault may lead to further complications and potential drivability issues.
How to diagnose DTC U1872 on BMW
To diagnose DTC U1872 on a BMW, a comprehensive diagnostic scan tool capable of reading manufacturer-specific codes is required. The following steps can be taken:
- Retrieve the fault codes and freeze frame data
- Inspect the wiring and connectors between the Drive Motor ‘A’ and ‘B’ Control Modules
- Perform a communication test between the modules
- Check for any software updates or reprogramming needed
How to fix DTC U1872 on BMW
To fix DTC U1872 on a BMW, the following steps can be taken:
- Address any wiring or connection issues between the control modules
- Replace the faulty Drive Motor ‘A’ or ‘B’ Control Module if necessary
- Perform any required software updates or reprogramming
- Clear the fault codes and test drive the vehicle to ensure the issue is resolved
How to erase DTC U1872 on BMW
To erase DTC U1872 on a BMW, use a diagnostic scan tool to clear the fault codes from the vehicle’s memory. After the repair and resolution of the communication issue between the Drive Motor ‘A’ and ‘B’ Control Modules, the fault codes can be cleared to reset the system and ensure the proper functioning of the hybrid drive system.
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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