Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble reading the spinning wheel at the back of the car, which helps it know how fast the car is going.
The rear tone wheel is a component that works with the wheel speed sensor to provide data on the rotational speed of the wheel.
The C003C code indicates a malfunction with the rear tone wheel, which is part of the wheel speed sensor system. This system is crucial for functions like ABS (Anti-lock Braking System) and traction control. The tone wheel is a toothed ring that rotates with the wheel, and the sensor reads the gaps between the teeth to determine the wheel's speed.
• ABS warning light on
• Traction control warning light on
• Inconsistent speedometer readings
• Damaged or dirty tone wheel
• Faulty wheel speed sensor
• Wiring issues or poor connections
Tone Wheel: A toothed ring that helps measure wheel speed.
ABS: Anti-lock Braking System, prevents wheels from locking during braking.
• Inspect the rear tone wheel for damage or debris.
• Check the wheel speed sensor for proper operation.
• Examine the wiring and connectors for damage or corrosion.
• Clean or replace the tone wheel if dirty or damaged.
• Replace the wheel speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly clean the wheel area to prevent debris buildup.
• Inspect wheel speed sensors during routine maintenance.
• Ensure wiring is secure and free from damage.
Sensor Issue
• Avoid driving in conditions where traction control is critical until the issue is fixed.
• Have the vehicle inspected by a professional if you're unsure about the repair.
Check with your vehicle manufacturer for warranty coverage on sensor-related repairs.
This code has been associated with issues in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – It affects safety systems like ABS and traction control, so it should be addressed promptly.
Ignoring this code can lead to reduced braking performance and traction control, increasing the risk of accidents.
• Vehicle on a lift to inspect the wheel area
• Engine off for electrical testing
The rear tone wheel is located near the rear wheel hub, often integrated with the brake rotor or axle.
Q: What happens if I ignore the C003C code?
A: Ignoring this code can lead to malfunctioning ABS and traction control systems, which can be dangerous.
Q: Can I drive with a C003C code?
A: While you can drive, it's not recommended as it affects safety systems. Get it fixed as soon as possible.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.