BMW DTC C1103 – FlexRay_Low Circuit High
DTC C1103 meaning on BMW
The DTC C1103 code on a BMW indicates an issue with the FlexRay communication network’s low circuit being detected as high. The FlexRay system is a high-speed communication network used in modern vehicles for various control modules to communicate with each other.
BMW DTC C1103 symptoms
Symptoms of the DTC C1103 code on a BMW may include:
- Malfunction indicator light (MIL) or check engine light illuminated on the dashboard
- Communication errors between control modules
- Issues with vehicle stability control systems
BMW DTC C1103 causes
Common causes of the DTC C1103 code on a BMW include:
- Faulty FlexRay communication network wiring
- Loose or poor connections in the FlexRay network
- Defective FlexRay communication module
BMW DTC C1103 seriousness
The seriousness of the DTC C1103 code on a BMW depends on the underlying cause. While the code itself may not directly affect the drivability of the vehicle, it can lead to communication issues between critical control modules, affecting the overall performance and safety systems of the vehicle.
How to diagnose DTC C1103 on BMW
To diagnose the DTC C1103 code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the FlexRay communication network wiring for any visible damage or corrosion
- Check the connections and terminals in the FlexRay network for tightness and proper contact
- Test the FlexRay communication module for proper functionality
How to fix DTC C1103 on BMW
To fix the DTC C1103 code on a BMW, the following steps may be taken:
- Repair or replace any damaged or corroded wiring in the FlexRay communication network
- Ensure all connections and terminals in the FlexRay network are secure and making proper contact
- Replace the faulty FlexRay communication module if necessary
How to erase DTC C1103 on BMW
To erase the DTC C1103 code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s computer. Once the underlying issue has been addressed and fixed, the code can be cleared to reset the system and turn off the malfunction indicator light.
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.