BMW DTC U189A – 14 Volt Power Module Lost Communication With Hybrid/EV Powertrain Control Module
DTC U189A meaning on BMW
DTC U189A on a BMW indicates that there is a communication error between the 14 Volt Power Module and the Hybrid/EV Powertrain Control Module. This error code signifies that the communication link between these two modules has been lost.
BMW DTC U189A symptoms
Symptoms of DTC U189A on a BMW may include:
- Check Engine Light illuminated
- Hybrid/EV system may not function properly
- Loss of power or performance issues
BMW DTC U189A causes
Possible causes of DTC U189A on a BMW include:
- Faulty 14 Volt Power Module
- Faulty Hybrid/EV Powertrain Control Module
- Wiring or connection issues between the modules
BMW DTC U189A seriousness
The seriousness of DTC U189A on a BMW depends on the underlying cause. If left unresolved, it can lead to further issues with the hybrid/EV system and potentially affect the vehicle’s performance and efficiency.
How to diagnose DTC U189A on BMW
To diagnose DTC U189A on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections between the 14 Volt Power Module and the Hybrid/EV Powertrain Control Module
- Check the functionality of both modules using diagnostic tools
How to fix DTC U189A on BMW
To fix DTC U189A on a BMW, you may need to:
- Repair or replace any faulty wiring or connections
- Replace the 14 Volt Power Module or the Hybrid/EV Powertrain Control Module if necessary
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC U189A on BMW
To erase DTC U189A on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Once the codes are cleared, you can perform a test drive to verify 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
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