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 saying that it can't read the speed of the left rear wheel properly because the signal is too strong.
The code C0662 indicates a problem with the electrical circuit for the left rear wheel speed sensor, where the signal voltage is higher than expected.
The C0662 code is triggered when the ABS (Anti-lock Braking System) module detects a high voltage signal from the left rear wheel speed sensor B circuit. This could be due to a short circuit, faulty sensor, or wiring issues.
• ABS warning light on
• Traction control light on
• Inoperative ABS or traction control system
• Faulty wheel speed sensor
• Short circuit in the wiring
• Corroded or damaged connectors
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the wheel speed sensor and wiring for damage.
• Check for corrosion or loose connections at the sensor.
• Use a multimeter to test the sensor's resistance and voltage output.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel speed sensors and wiring.
• Keep connectors clean and free of corrosion.
• Avoid driving in harsh conditions that could 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.
• Regular maintenance can prevent sensor issues.
Check vehicle warranty for coverage on ABS components.
This code has been associated with issues in vehicles with ABS systems, particularly in models with known sensor vulnerabilities.
Moderate – It affects the ABS system, which is important for safety, but the vehicle can still be driven cautiously.
Driving with a malfunctioning ABS system can increase the risk of skidding during emergency braking.
• Vehicle parked on a flat surface
• Ignition in the ON position
The left rear wheel speed sensor is located near the wheel hub assembly on the rear left side of the vehicle.
Q: Can I drive with the C0662 code?
A: Yes, but drive cautiously as the ABS system may not function properly.
Q: How do I reset the ABS light?
A: After repairs, use an OBD-II scanner to clear the code and reset the light.
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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