C0040Wysoki
Czujnik prędkości koła prawego przedniego — usterka obwodu
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Sprawdź szczegóły →C1100
KrytycznyABS pump switch circuit failure. The code indicates a fault in the electrical system of the hydraulic pump of the anti-lock braking system (ABS).
OBD-II (EN): ABS Pump Switch Circuit Malfunction
Code C1100 signals a fault in the electrical circuit of the ABS hydraulic pump switch, which may completely disable the anti-lock braking system. Causes may include damaged wires, a faulty relay, or a failure of the ABS module itself. Due to the direct safety risk, immediate diagnosis at a workshop with professional equipment is recommended.
Symptoms
Illuminated ABS warning light on the dashboard; possible illumination of the ESP/DSC/VSC warning light; ABS system may be completely disabled; lack of pressure modulation during hard braking; the vehicle may behave like a car without ABS during emergency braking; possible longer stopping distance on slippery surfaces.
Possible causes
• Faulty ABS pump motor switch or relay • Open or short circuit in the wiring harness supplying the ABS hydraulic pump • Corrosion or oxidation of the electrical connectors of the ABS module (EBCM/HCU) • Damaged ABS control module (EBCM) – internal controller failure • Faulty ABS hydraulic pump motor – no response to control signals
Affected systems
ABS (Anti-lock Braking System)ESP / ESC (Electronic Stability Control)Układ hydrauliczny hamulcówEBCM (Electronic Brake Control Module)HCU (Hydraulic Control Unit)
Related codes
Does code C1100 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.