Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is not getting a signal from the sensor that tells how fast the back right wheel is spinning.
The P15C9 code indicates that there is an open circuit in the rear right wheel speed sensor, which means the sensor is not communicating properly with the vehicle's computer.
The wheel speed sensor is responsible for providing the anti-lock braking system (ABS) and traction control system (TCS) with data on the rotational speed of the wheels. An open circuit in the rear right wheel speed sensor means there is a break in the electrical path, preventing the sensor from sending signals to the control module.
• ABS warning light on
• Traction control warning light on
• Inoperative ABS or traction control
• Faulty rear right wheel speed sensor
• Damaged wiring or connectors
• Corrosion in the sensor circuit
ABS: Anti-lock Braking System
TCS: Traction Control System
• Inspect the rear right wheel speed sensor and wiring for damage.
• Check for continuity in the sensor circuit.
• Test the sensor output with a multimeter.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Clean any corrosion from the sensor circuit.
• Multimeter
• Socket set
• Screwdriver
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regularly inspect wheel speed sensors.
• Keep connectors clean and free of corrosion.
• Avoid driving through deep water.
Sensor Issue
• Do not ignore the warning lights on the dashboard.
• Have the vehicle inspected by a professional if unsure.
• Avoid hard braking until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on ABS components.
This code has been commonly reported in vehicles with high mileage or those exposed to harsh environmental conditions.
Moderate – While the vehicle may still be drivable, the ABS and traction control systems may not function properly, increasing the risk of skidding.
Driving without a functioning ABS system can increase stopping distances and the risk of losing control in slippery conditions.
• Vehicle parked on a flat surface
• Ignition in the on position
The rear right wheel speed sensor is located near the brake assembly on the rear right wheel.
Q: Can I drive with a P15C9 code?
A: While you can drive, it's not recommended as the ABS and traction control systems may not work properly.
Q: How do I reset the ABS light?
A: Fix the underlying issue and then clear the code with an OBD-II scanner.
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.
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