C0035Wysoki
Czujnik prędkości koła lewego przedniego — usterka obwodu
Podwozie
Sprawdź szczegóły →C1040
WysokiComparative performance of the rear wheel speed sensor – the ABS system detected an inconsistency in the rear wheel speed readings relative to the other wheels.
OBD-II (EN): Rear Wheel Speed Sensor Comparison Error
Code C1040 informs that the ABS module detected an incorrect or inconsistent rear wheel speed compared to the other wheels. The most common cause is a faulty ABS sensor, a dirty tone ring, or a worn wheel bearing with an encoder. Due to the direct impact on the braking system and ABS operation, immediate diagnosis by a specialist is recommended.
Symptoms
• ABS warning light is permanently on • Traction control system (TCS) and/or stability control (ESP/ESC) warning light may be active • ABS system may be completely disabled – no assistance during hard braking • Possible deactivation of the ESP/DSC system • Extended stopping distance on slippery surfaces • Vibrations or jerking during braking (in some cases) • No visible symptoms during normal driving on dry pavement
Possible causes
• Damaged or faulty rear wheel speed sensor (active or passive) • Damaged, corroded, or dirty tone ring (ABS ring) on the hub or axle shaft • Open circuit, short circuit, or mechanical damage in the sensor wiring harness • Worn or damaged wheel bearing with integrated ABS sensor (encoder bearing) • Failure or incorrect operation of the ABS/EBCM (Electronic Brake Control Module) • Excessive radial runout of the wheel hub affecting sensor readings
Affected systems
ABS (Anti-lock Braking System)ESP / ESC (Electronic Stability Control)TCS (Traction Control System)EBD (Electronic Brakeforce Distribution)Układ hamulcowy
Related codes
C0040Wysoki
Czujnik prędkości koła prawego przedniego — usterka obwodu
Podwozie
Sprawdź szczegóły →Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code C1040 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.