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 having trouble reading the speed of the left back wheel. It's like when your speedometer doesn't work right on your bike.
The vehicle's computer monitors the wheel speed sensors to ensure they are providing accurate data. If the sensor's output is outside the expected range or performance, it triggers this code.
The C050D code is set when the Electronic Brake Control Module (EBCM) detects a performance issue with the left rear wheel speed sensor. This sensor is responsible for providing the speed of the wheel to the EBCM for proper functioning of systems like ABS and traction control.
• ABS warning light on
• Traction control light on
• Inaccurate speed readings
• Faulty left rear wheel speed sensor
• Damaged wiring or connectors
• Malfunctioning EBCM
EBCM: Electronic Brake Control Module
ABS: Anti-lock Braking System
• Inspect the left rear wheel speed sensor and its wiring for damage.
• Check the sensor's electrical connections for corrosion or looseness.
• Use a diagnostic tool to read sensor output and compare with expected values.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the EBCM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel speed sensors and wiring.
• Keep connectors clean and free from corrosion.
• Avoid driving through deep water which can damage sensors.
Sensor Issue
• Have the vehicle inspected by a professional if the ABS light is on.
• Avoid hard braking until the issue is resolved.
• Check for recalls related to the ABS system.
Check with the manufacturer for warranty coverage on ABS components.
Wheel speed sensor issues are common in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – While the vehicle may still be drivable, the ABS and traction control systems may not function properly.
Driving with a malfunctioning ABS system can increase stopping distances and the risk of skidding.
• Dry road surface
• Vehicle speed above 20 mph
The left rear wheel speed sensor is located near the wheel hub assembly of the left rear wheel.
Q: Can I drive with a C050D 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 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.
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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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