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 speed of the left rear wheel because the sensor might be broken or the wires are not connected properly.
The vehicle's control module has detected an open circuit or malfunction in the left rear wheel speed sensor circuit.
The C050C code is triggered when the ABS (Anti-lock Braking System) module detects an open or malfunction in the circuit of the left rear wheel speed sensor. This sensor is responsible for sending wheel speed data to the ABS module, which is crucial for monitoring and controlling the braking system.
• ABS warning light on
• Traction control light on
• Inoperative ABS or traction control
• Faulty left rear wheel speed sensor
• Damaged or corroded wiring or connectors
• Faulty ABS module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the left rear wheel speed sensor for damage.
• Check the wiring and connectors for corrosion or damage.
• Test the sensor's resistance and continuity with a multimeter.
• Replace the left rear wheel speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ABS module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel speed sensors.
• Keep sensor areas clean and free of debris.
• Check wiring for wear and tear periodically.
Sensor Issue
• Do not ignore the ABS warning light.
• Have the vehicle inspected by a professional.
• Avoid harsh 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 frequently driven in harsh weather conditions.
Moderate – While the vehicle may still be drivable, the ABS system may not function properly, affecting braking performance.
Driving with a malfunctioning ABS system can increase stopping distances and affect vehicle safety.
• Vehicle parked on a level surface
• Engine off and key out of the ignition
The left rear wheel speed sensor is located near the wheel hub assembly of the left rear wheel.
Q: Can I drive with a C050C code?
A: While you can drive, it's not recommended as the ABS may not work properly, affecting braking safety.
Q: How do I reset the ABS light?
A: Fix the underlying issue and use an OBD-II scanner to clear the code. The light should go off if the problem is resolved.
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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