Utrata komunikacji z BCM (moduł nadwozia)
U0405
ŚredniInvalid Data Received from Cruise Control Module. The engine controller (ECM/PCM) has detected invalid or corrupted data transmitted by the speed control module (cruise control) via the CAN bus.
OBD-II (EN): Invalid Data Received from Cruise Control Module
Code U0405 means the vehicle controller has received invalid or corrupted data from the cruise control module via the CAN network. Cruise control may be completely disabled. Causes vary – from wiring faults to a faulty electronic module – so professional diagnostics with CAN network readout are recommended.
Symptoms
Cruise control does not work or operates erratically (does not maintain speed, turns off by itself). The MIL is illuminated on the dashboard. In some vehicles, related systems may be disabled: ACC (Adaptive Cruise Control), Lane Assist, or ESP. No other serious driving symptoms – the vehicle usually remains normally drivable.
Possible causes
• Faulty or defective cruise control module generating incorrect CAN data frames • Problems with CAN bus wiring – corrosion, open circuit, short circuit, or damage to CAN-H/CAN-L shielding • Weak or oxidized electrical grounds for the cruise control module • Low supply voltage (discharged battery, faulty alternator) causing data transmission errors • Module software (firmware) error – controller update or reset required
Affected systems
Related codes
Nieprawidłowe dane z ECM
Utrata komunikacji z modułem wspomagania (EPS)
Utrata komunikacji z ECM (sterownik silnika)
Utrata komunikacji z czujnikiem zakresu przedniego dystansu tempomatu. Moduł sterujący nie otrzymuje danych z radaru adaptacyjnego tempomatu.
Does code U0405 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.
