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 front wheel because the sensor is not working properly all the time.
This code indicates that the signal from the left front wheel speed sensor is not consistent, which can affect the car's ability to monitor wheel speed accurately.
The C0655 code is set when the Anti-lock Braking System (ABS) module detects an intermittent or erratic signal from the left front wheel speed sensor. This sensor is crucial for the ABS to function correctly, as it provides real-time data on the wheel's rotational speed.
• ABS warning light on
• Traction control light on
• Erratic braking behavior
• Faulty left front wheel speed sensor
• Damaged or corroded wiring or connectors
• Faulty ABS module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, second generation
• Check for any stored ABS codes.
• Inspect the left front wheel speed sensor and wiring for damage.
• Test the sensor output with a multimeter.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Replace the ABS module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel speed sensors for damage.
• Keep the sensor area clean and free of debris.
• Ensure wiring connections are secure.
Sensor Issue
• Avoid hard braking until the issue is resolved.
• Get the vehicle inspected by a professional as soon as possible.
Wheel speed sensors may be covered under the vehicle's powertrain or emissions warranty.
This code has been commonly reported in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – While the vehicle may still be drivable, it is important to address this issue to ensure proper braking performance.
Driving with a malfunctioning ABS can increase stopping distances and may not comply with vehicle safety regulations.
• Vehicle must be driven at a speed where the ABS would normally activate.
• Test on a dry and safe road surface.
The left front wheel speed sensor is located near the brake rotor on the left front wheel hub assembly.
Q: Can I drive with a C0655 code?
A: While the vehicle may still be drivable, it is not recommended as it can affect the braking system's performance.
Q: How do I reset the ABS light after fixing the sensor?
A: After repairs, the ABS light should reset automatically. If not, use an OBD-II scanner to clear the codes.
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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