U0073Krytyczny
Magistrala CAN — wyłączona (bus off)
Komunikacja sieciowa
Sprawdź szczegóły →U0200
ŚredniLost Communication with Door Control Module 'A'. The vehicle controller cannot establish communication with the door module, most often the front left (driver's) door.
OBD-II (EN): Lost Communication with Door Control Module A
Code U0200 means lost communication with the door control module – the vehicle signals that the central controller cannot 'talk' to the door electronics, which can cause problems with windows, locks, or mirrors. The cause is often a damaged wiring harness, corroded connectors, or a faulty module. Due to the complexity of CAN network diagnostics, a visit to a workshop with professional diagnostic equipment is recommended.
Symptoms
Power windows not working, central locking unresponsive or malfunctioning, electric mirrors not responding to controls, comfort system fault warning on the dashboard, possible loss of mirror illumination or heating, sometimes deactivation of safety functions related to the door.
Possible causes
• Damaged wiring harness in the rubber boot/bellow between the body and door (most common cause – repeated opening causes material fatigue) • Corrosion or loose connection of the door module connector or CAN bus connectors • Defect in the door control module itself (internal electronic failure) • Open or short circuit on the CAN line (CAN-H or CAN-L) in the door circuit • Blown fuse for the door module power supply
Affected systems
Magistrala CANModuł sterowania drzwiamiElektryczne szybyCentralny zamekLusterka elektryczneSystem komfortu
Related codes
U0100Krytyczny
Utrata komunikacji z ECM (sterownik silnika)
Komunikacja sieciowa
Sprawdź szczegóły →Does code U0200 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.