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 thinks that the part that tells it how fast the left back wheel is spinning is the wrong one.
The vehicle's control module has detected that the left rear wheel speed sensor is not the correct type or is not functioning as expected.
The C0557 code indicates that the Electronic Brake Control Module (EBCM) has identified an incorrect or incompatible wheel speed sensor installed at the left rear wheel. This can affect the Anti-lock Braking System (ABS) and traction control functions.
• ABS warning light on
• Traction control system not functioning
• Inconsistent speed readings from the left rear wheel
• Incorrect wheel speed sensor installed
• Faulty wheel speed sensor
• Incompatible sensor due to vehicle modifications
ABS: Anti-lock Braking System
EBCM: Electronic Brake Control Module
• Verify the correct part number for the wheel speed sensor.
• Inspect the left rear wheel speed sensor for damage.
• Check the sensor's electrical connections and wiring.
• Replace the incorrect wheel speed sensor with the correct one.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Ensure correct parts are used during repairs.
• Regularly inspect wheel speed sensors for damage.
• Avoid unauthorized vehicle modifications.
Sensor Issue
• Have a professional verify the correct sensor is installed.
• Avoid driving aggressively until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on ABS components.
This code has been associated with incorrect sensor installations during repairs or aftermarket modifications.
Moderate – It affects safety systems like ABS and should be addressed promptly.
Operating a vehicle with a faulty ABS system can be dangerous, especially in adverse conditions.
• Vehicle on a flat surface
• Ignition in the 'on' position without starting the engine
The left rear wheel speed sensor is located near the wheel hub of the left rear wheel.
Q: Can I drive with a C0557 code?
A: It's not recommended as it affects the ABS, which is a critical safety feature.
Q: How do I know if the sensor is incorrect?
A: Check the part number against the manufacturer's specifications for your vehicle.
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.