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 getting a signal from the right rear wheel that is too strong, like it's spinning way too fast.
The wheel speed sensor is sending a signal that is higher than expected, which may indicate a malfunction.
The right rear wheel speed sensor is responsible for sending the speed data of the wheel to the vehicle's ABS control module. A signal that is too high may indicate a fault in the sensor, wiring, or the ABS module itself.
• ABS warning light on
• Traction control light on
• Inconsistent braking performance
• Faulty wheel speed sensor
• Damaged sensor wiring or connector
• Faulty ABS control module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the wheel speed sensor and wiring for damage.
• Check the sensor's electrical connections.
• Test the sensor output with a multimeter.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring.
• Replace the ABS control module if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect wheel speed sensors.
• Ensure wiring is not exposed to harsh conditions.
• Keep the ABS system maintained.
Sensor Issue
• Do not ignore ABS warning lights.
• Seek professional help if unsure about repairs.
Check with your vehicle's manufacturer for specific warranty coverage on ABS components.
This code often appears in vehicles with high mileage or those exposed to harsh environments.
Moderate – It affects braking performance, so it should be addressed promptly.
Driving with a faulty ABS can increase the risk of accidents due to poor braking performance.
• Vehicle stationary
• Ignition on
The right rear wheel speed sensor is located near the wheel hub of the right rear tire.
Q: Can I drive with a C123E code?
A: It's not recommended as it can affect your vehicle's braking performance.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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.
View on Amazon
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.