U0140Średni
Utrata komunikacji z BCM (moduł nadwozia)
Komunikacja sieciowa
Sprawdź szczegóły →U0265
ŚredniLost Communication with HVAC Control Module 'B'. The master module cannot establish communication with HVAC Module B via the CAN bus.
OBD-II (EN): Lost Communication with HVAC Control Module B
Code U0265 indicates a loss of communication with the HVAC control module B (HVAC B) – the vehicle's main computer cannot contact it via the CAN network. The cause may be a problem with the wiring, connector, or the module itself. Diagnostics require a specialized scanner with CAN network support and analysis of the vehicle's electrical schematic.
Symptoms
No operation or improper operation of the HVAC system; the HVAC control panel may be unresponsive or display errors; possible lack of temperature or airflow regulation; MIL or warning on the dashboard; in some vehicles, lack of rear window defrost or heated seats associated with module B.
Possible causes
• Damaged or improperly connected CAN bus wire (High/Low) leading to HVAC Module B • Corrosion or loose connection of the HVAC control module B connector • Faulty (defective) HVAC Module B – internal processor or CAN transceiver failure • Short or open circuit in the power/ground circuit of HVAC Module B • Disturbances on the CAN bus caused by another faulty network node
Affected systems
Magistrala CANModuł sterowania klimatyzacją HVAC BSieć komunikacyjna pojazduUkład ogrzewania i klimatyzacjiModuł nadrzędny (BCM/ECM)
Related codes
B1000Wysoki
Moduł sterowania nadwoziem (BCM) — usterka wewnętrzna
Nadwozie
Sprawdź szczegóły →U0100Krytyczny
Utrata komunikacji z ECM (sterownik silnika)
Komunikacja sieciowa
Sprawdź szczegóły →Code U0265 appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code U0265 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.