Hybspec

U0260

Wysoki

Lost Communication with Control Module (CAN Network) – No response from the vehicle control unit. The code indicates a break in communication between controllers on the multiplex network.

OBD-II (EN): Lost Communication with Vehicle Control Module

Code U0260 indicates a loss of communication with a control module on the vehicle's CAN network – most often related to the BSI/BCM module responsible for body electrical functions. The cause may be a damaged wiring harness, corroded connectors, or a faulty controller. Due to the complexity of multiplex network diagnostics, we recommend a visit to a workshop with professional diagnostic equipment.

Symptoms

The MIL (Check Engine) light illuminates on the dashboard. Random electrical failures may occur: non-functional lighting, locks, power windows, or other functions controlled by the BSI/BCM. The vehicle may enter limp mode with reduced engine power. Intermittent engine stalling or starting problems. No response from other systems dependent on CAN communication.

Possible causes

• Damage or break in the CAN bus wire (CAN High / CAN Low) • Corrosion or poor contact in the control module (BCM/BSI) electrical connector • Power or ground failure of the body control module • Faulty BCM/BSI module (internal controller failure) • Electromagnetic interference or short circuit in the multiplex network wiring harness • Damaged CAN bus terminating resistors (120 Ω at network ends)

Affected systems

Sieć CAN (Controller Area Network)Moduł sterujący nadwozia (BCM/BSI)Układ elektryczny pojazduSterownik silnika (ECM/PCM) – komunikacjaUkład komfortu i bezpieczeństwa biernego

Related codes

Does code U0260 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.