Utrata komunikacji z BCM (moduł nadwozia)
U0205
ŚredniLost Communication with Door Control Module G. The Body Control Module (BCM) cannot establish communication with the door control module via the CAN bus.
OBD-II (EN): Lost Communication with Door Control Module G
Code U0205 means lost communication with the door control module – the vehicle controller cannot communicate with it via the CAN bus. This manifests as problems with locks, power windows, or keyless entry. The cause could be damaged wiring, a corroded connector, or a faulty module – diagnosis by a specialist with proper equipment is recommended.
Symptoms
- Door functions unresponsive (locks, power windows, interior lighting) - Unstable or non-functional central locking and keyless entry - Flashing BCM warning light / dashboard warning - Power window motor unresponsive to commands - Side mirror may not respond to electric adjustment - In some vehicles, inability to open the door from the electronic system
Possible causes
- Damaged or corroded door control module connector/plug - Open or short circuit in CAN bus wiring (CAN-High or CAN-Low line) - Internal failure of the Door Control Module (DCM) - Blown fuse supplying the door module - Temporary communication error caused by voltage fluctuations (e.g., weak battery) - Damaged CAN bus terminators
Affected systems
Related codes
Utrata komunikacji z modułem wspomagania (EPS)
Moduł sterowania nadwoziem (BCM) — usterka wewnętrzna
Utrata komunikacji z ECM (sterownik silnika)
Sources and further reading
Does code U0205 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.
