U0121Wysoki
Utrata komunikacji z modułem ABS
Komunikacja sieciowa
Sprawdź szczegóły →C1140
KrytycznyABS module fault or communication interference with the ABS system. The controller has detected incorrect operation of the anti-lock braking system.
OBD-II (EN): ABS Module Malfunction or Communication Error with ABS System
Code C1140 indicates a detected fault in the ABS module or communication interference with this system — it could be a faulty wheel speed sensor, a wiring problem, or the ABS controller itself. A non-functional ABS system significantly increases stopping distance and disables ESP and TCS safety systems. Due to the direct impact on driving safety, diagnosis at an authorized service center or workshop with professional OBD equipment is recommended as soon as possible.
Symptoms
Illuminated ABS warning light on the dashboard; lack of assistance during emergency braking (ABS inactive); deteriorated or disabled ESP (Electronic Stability Program); deactivation of the TCS (traction control) system; possible illumination of the brake warning light; extended stopping distance on slippery surfaces.
Possible causes
• Damaged or faulty ABS control module (ECU/HCU) • Interference or interruption in CAN-bus communication between the ABS controller and other vehicle modules • Damaged wheel speed sensor (ABS sensor) or its wiring • Low supply voltage or short circuit in the ABS module circuit • Corrosion or damage to the ABS module electrical connectors • Damaged ABS system relay or fuse
Affected systems
Related codes
Does code C1140 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.