BMW DTC U0026 – Low Speed CAN Communication Bus (-) High
DTC U0026 meaning on BMW
The DTC U0026 Low Speed CAN Communication Bus (-) High error code on BMW vehicles indicates a problem with the communication bus (-) line in the low-speed CAN network. This network is responsible for transmitting data between various control modules in the vehicle.
BMW DTC U0026 symptoms
Symptoms of the DTC U0026 Low Speed CAN Communication Bus (-) High may include issues with various vehicle systems such as the instrument cluster, power windows, central locking, and other electronic components. The vehicle may also experience intermittent or complete loss of communication between control modules.
BMW DTC U0026 causes
Common causes of the DTC U0026 Low Speed CAN Communication Bus (-) High include damaged wiring, loose connections, faulty control modules, or issues with the CAN bus itself. Water ingress or corrosion in the wiring harness can also lead to this fault code.
BMW DTC U0026 seriousness
While the DTC U0026 error code may not directly affect the drivability of the vehicle, it can lead to malfunctions in various electronic systems. Ignoring this issue can result in inconvenience and potential safety hazards due to the loss of communication between critical control modules.
How to diagnose DTC U0026 on BMW
To diagnose the DTC U0026 Low Speed CAN Communication Bus (-) High on a BMW, a diagnostic scan tool capable of reading BMW-specific fault codes is required. The technician will need to inspect the wiring harness, connectors, and control modules associated with the low-speed CAN network for any visible damage or loose connections.
How to fix DTC U0026 on BMW
Fixing the DTC U0026 error on a BMW involves identifying and repairing the root cause of the communication bus issue. This may include repairing or replacing damaged wiring, securing loose connections, or replacing faulty control modules. It is essential to follow the manufacturer’s diagnostic procedures and wiring diagrams during the repair process.
How to erase DTC U0026 on BMW
Once the underlying issue causing the DTC U0026 Low Speed CAN Communication Bus (-) High has been resolved, the fault code can be cleared using a diagnostic scan tool. The technician can access the vehicle’s onboard diagnostic system and clear the stored fault codes to reset the system and verify that the issue has been successfully addressed.
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.