C1042Wheel-speed signal front-left: sensor target (tone ring) fault

• Renault/Dacia code · ABS / stability control
• Lights a warning lamp

How the car detects it

The front-left wheel-speed signal is not plausible. Renault's tables link this code to the sensor target, the toothed or magnetic ring the sensor reads. This meaning comes from Renault's tables for its older Bosch ABS/ESP 8.0 units; newer ABS units (for example on Logan II and Clio IV) report wheel faults under other codes. While the fault is present, ABS (and ESP, if fitted) is usually switched off; normal braking still works.

What you may notice

• ABS (and ESP) warning light
• ABS does not work

Likely causes

• PossibleDamaged, dirty or rusted tone ring
• PossibleLoose sensor or too large a gap to the ring
• RareWheel bearing play

Sources

• autodiag-france.com › la-liste-complete-des-codes-defaut-renault-co…
• autoxuga.com › renaultdtc5042.html

Backed by at least two independent sources.

From Obdaryn's Renault/Dacia pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.