Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there is a problem with the sensor that tells the car how fast the left back wheel is spinning.
The wheel speed sensor measures the rotational speed of the wheel and sends this information to the vehicle's computer system.
The C0037 code indicates an issue with the left rear wheel speed sensor circuit. This sensor is part of the anti-lock braking system (ABS) and traction control system, which help maintain vehicle stability and control. It detects the speed of the wheel and transmits this data to the ABS control module. If the sensor fails or sends incorrect signals, it can trigger the C0037 code.
• ABS warning light on the dashboard
• Traction control light illuminated
• Inconsistent or erratic braking behavior
• Faulty left rear wheel speed sensor
• Damaged wiring or connectors in the sensor circuit
• Malfunctioning ABS control module
ABS: Anti-lock Braking System
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it
• Inspect the left rear wheel speed sensor and wiring for damage.
• Check the sensor's electrical connections and ensure they are secure.
• Use a diagnostic scanner to read ABS module data and verify sensor operation.
• Replace the faulty left rear wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ABS control module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect wheel speed sensors and wiring.
• Keep the wheel area clean to prevent dirt buildup.
• Perform routine ABS system checks.
Sensor Issue
• Do not ignore ABS warning lights.
• Get the vehicle checked by a professional if braking feels unusual.
Check with your vehicle manufacturer for specific warranty coverage on ABS components.
Wheel speed sensor issues have been common in vehicles with ABS systems, especially as they age or in harsh driving conditions.
Moderate – While the vehicle can still be driven, the ABS and traction control systems may not function properly, affecting safety.
Driving with a malfunctioning ABS system can increase the risk of accidents, especially in adverse weather conditions.
• Dry, flat surface
• Vehicle parked and secured
The left rear wheel speed sensor is located near the brake rotor on the left rear wheel of the vehicle.
Q: What happens if I ignore the C0037 code?
A: Ignoring the C0037 code can lead to compromised braking performance and increased risk of accidents.
Q: Can I drive with a faulty wheel speed sensor?
A: While you can drive, it's not recommended as it affects the ABS and traction control systems, which are crucial for safe driving.
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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