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 can't talk to the front left wheel's speed sensor, which helps the car know how fast that wheel is spinning.
The vehicle's control module has detected an open circuit or a fault in the left front wheel speed sensor circuit.
The C0651 code indicates that the Electronic Brake Control Module (EBCM) has detected an open or malfunction in the left front wheel speed sensor B circuit. This sensor is crucial for systems like ABS and traction control, as it provides real-time data on wheel speed.
• ABS warning light on
• Traction control system disabled
• Inconsistent speedometer readings
• Faulty wheel speed sensor
• Damaged wiring or connectors
• Faulty EBCM
EBCM: Electronic Brake Control Module
ABS: Anti-lock Braking System
• Inspect the wheel speed sensor and its wiring for damage.
• Check the sensor connector for corrosion or loose connections.
• Use a multimeter to test the sensor's resistance and continuity.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Replace the EBCM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel sensors and wiring.
• Avoid driving through deep water to prevent sensor damage.
• Keep the undercarriage clean to prevent corrosion.
Sensor Issue
• Avoid hard braking until the issue is resolved.
• Drive carefully as ABS and traction control may not function properly.
Check with the manufacturer for warranty coverage on sensors and related components.
This code has been commonly reported in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – The vehicle can still be driven, but safety features like ABS may not work.
Ensure repairs are conducted by a qualified technician to maintain vehicle safety and compliance with regulations.
• Vehicle stationary with ignition on.
• Wheel speed sensor disconnected.
The left front wheel speed sensor is located near the brake rotor of the front left wheel.
Q: Can I drive with a C0651 code?
A: Yes, but be cautious as ABS and traction control may not work.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, 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.
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.
View on Amazon
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.