U0140Średni
Utrata komunikacji z BCM (moduł nadwozia)
Komunikacja sieciowa
Sprawdź szczegóły →U0315
KrytycznyLost Communication with ABS Control Module. The ECU cannot establish or maintain communication with the ABS/ESP control unit via the CAN network.
OBD-II (EN): Lost Communication with ABS Control Module
Code U0315 indicates a loss of communication between the vehicle's main controller (ECU) and the ABS module – the ABS and ESP systems may stop working, directly affecting driving safety. The most common causes are a damaged CAN network wiring harness, corroded connectors, or a defect in the ABS controller itself. Due to safety concerns, immediate diagnosis at an authorized service center or workshop with a professional CAN scanner is recommended.
Symptoms
ABS and/or ESP light is on the dashboard. The ABS and ESC/ESP systems may be completely disabled. Possible deactivation of the Traction Control System (TCS). In some vehicles, a brake system error message may appear. The brake pedal may respond normally, but there is no ABS assistance during hard braking.
Possible causes
• Damaged or burnt CAN bus wiring harness between ECU and ABS module • Corrosion or loose connectors at the ABS module or CAN network nodes • Defect of the ABS control module itself (internal integrated circuit failure) • Open or short circuit in the CAN High / CAN Low line leading to the ABS controller • Blown fuse for the ABS module power supply or open ground circuit
Affected systems
ABS (Anti-Lock Braking System)ESP/ESC (Electronic Stability Control)TCS (Traction Control System)Sieć CAN (Controller Area Network)Układ hamulcowy
Related codes
C0035Wysoki
Czujnik prędkości koła lewego przedniego — usterka obwodu
Podwozie
Sprawdź szczegóły →C0040Wysoki
Czujnik prędkości koła prawego przedniego — usterka obwodu
Podwozie
Sprawdź szczegóły →U0121Wysoki
Utrata komunikacji z modułem ABS
Komunikacja sieciowa
Sprawdź szczegóły →U0100Krytyczny
Utrata komunikacji z ECM (sterownik silnika)
Komunikacja sieciowa
Sprawdź szczegóły →Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Sources and further reading
Does code U0315 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.