BMW DTC U1817 – Lost Communication With Status Charge Hybrid/EV Battery
DTC U1817 meaning on BMW
The Diagnostic Trouble Code (DTC) U1817 on a BMW indicates a communication error with the Status Charge Hybrid/EV Battery. This code is specific to hybrid or electric vehicles and suggests a problem with the communication system that monitors the status of the battery.
BMW DTC U1817 symptoms
Symptoms of DTC U1817 on a BMW may include:
- Check Engine Light (CEL) illuminated
- Hybrid/EV system warning light on
- Reduced hybrid/EV performance
- Issues with battery charging
BMW DTC U1817 causes
The potential causes of DTC U1817 on a BMW include:
- Faulty communication module
- Loose or damaged wiring connections
- Issues with the hybrid/EV battery itself
- Software glitches in the monitoring system
BMW DTC U1817 seriousness
DTC U1817 should be addressed promptly as it can affect the performance and safety of the hybrid/EV system. Ignoring this code may lead to further damage to the battery or other components, potentially resulting in a complete system failure.
How to diagnose DTC U1817 on BMW
To diagnose DTC U1817 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections related to the hybrid/EV battery
- Check the battery status and health using specialized tools
- Test the communication modules for proper functioning
How to fix DTC U1817 on BMW
To fix DTC U1817 on a BMW, consider the following:
- Repair or replace any damaged wiring or connections
- Address any issues with the hybrid/EV battery itself
- Update software and reset the communication system
- Replace faulty communication modules if necessary
How to erase DTC U1817 on BMW
To erase DTC U1817 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the system’s memory. After addressing the underlying issue and fixing the root cause, clearing the code will reset the system and turn off the warning lights.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.