Is it safe to drive with this code?

Your standard brakes will continue to work, but ABS, traction control, and stability control systems may be disabled or operate erratically. Stopping distances can increase on wet or slippery roads, and vehicle control may be reduced in emergency braking situations. For your safety and that of others, have the fault inspected and repaired promptly—see our safety disclaimer for more detail.

C003C may affect your MOT outcome if the ABS warning lamp is illuminated at the time of test, as dashboard warning lights are part of the inspection. An intermittent fault that is not showing a warning light at test time may not cause a failure, but this cannot be guaranteed—refer to our MOT disclaimer for full details.

Roughly how much does it cost to fix?

Repair costs vary widely. Simple fixes such as cleaning a sensor or repairing a chafed wire might fall into the low two-figure range for parts and minimal labour. Replacing the sensor typically costs in the low three-figure bracket (parts plus labour), whilst hub or bearing replacement, or module-level repairs, can rise into the mid or high three-figure range. Prices depend on sensor accessibility, whether the fault is wiring-related, and whether you use an independent garage or a dealer.

Can I just clear the code and carry on?

Clearing the code without addressing the underlying circuit fault will typically result in the warning returning once the ABS module re-runs its self-test. Intermittent faults can be elusive but usually indicate wiring, connector, or sensor degradation that will worsen over time if left unattended.

Professional mechanic working in workshop

← All fault codes | ABS / ESP

C003C

Chassis

Right Front Wheel Speed Sensor Circuit Intermittent

C003C typically indicates the ABS module is detecting an intermittent or unreliable signal from the right front wheel speed sensor circuit.

garage.co.uk

Need a garage?

Compare quotes from verified UK garages near you.

→

car.co.uk

Sell your car

We specialise in problem cars: warning lights, faults, high mileage. Fair instant offer.

→

trader.co.uk

List your car

Free private listing. Reach thousands of UK buyers, no fees.

→

ⓘ Information only. This page provides general educational information about fault code C003C. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does C003C mean?

C003C is a Chassis (ABS, traction control, steering) fault code. It indicates: Right Front Wheel Speed Sensor Circuit Intermittent.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About ABS / ESP codes

Codes in this category relate to the anti-lock braking system (ABS) and electronic stability control (ESP/ESC). These systems share wheel speed sensors, hydraulic modulators, and a common control module. Faults here usually disable ABS pulse braking and stability control assistance, but standard hydraulic brakes continue working normally.

C003C is one of 429 codes in this category. Browse all ABS / ESP codes →

What we know about C003C specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for C003C.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to C003C in the C-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

C0039 Right Front Wheel Speed Sensor Circuit

C003A Right Front Wheel Speed Sensor Circuit Low

C003B Right Front Wheel Speed Sensor Circuit High

C003D Right Front Wheel Speed Sensor Circuit Range/Performance

C003E Right Front Wheel Speed Sensor Supply Voltage Circuit Low

C0040 Right Front Wheel Speed Sensor Circuit Malfunction

Other ABS / ESP codes

Other fault codes in the same system as C003C. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1106

Shift Lock Circuit Failure Detailed guide

C0021

Left Front Wheel Speed Sensor Circuit Detailed guide

C0035

Left Front Wheel Speed Sensor Circuit Range/Performance Detailed guide

C1000

Abnormality in Stoplight Switch Circuit Detailed guide

C1602

Manufacturer-Specific Chassis/ABS Fault Detailed guide

B1082

ORC-Occupant Restraint Control-Fps-Fire Protection Strategy-Activated

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with C003C can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

✎

Help us improve the C003C page

Spotted an error, missing detail, or have first-hand experience to add? Tell us, we review every submission.