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 the wrong part was put in for the sensor that tells how fast the right front wheel is spinning.
The vehicle's control module has detected that the wheel speed sensor installed on the right front wheel is not the correct type or is incompatible with the system.
The C0556 code indicates that the electronic control unit (ECU) has identified a mismatch or incorrect installation of the right front wheel speed sensor. This sensor is crucial for the anti-lock braking system (ABS) and traction control system, as it provides real-time data on the wheel's rotational speed.
• ABS warning light on
• Traction control system warning light on
• Possible loss of ABS functionality
• Incorrect wheel speed sensor installed
• Faulty or incompatible sensor
• Installation error
ECU: Electronic Control Unit, the computer that controls vehicle functions.
ABS: Anti-lock Braking System, prevents wheels from locking up during braking.
• Verify the part number of the installed sensor against the manufacturer's specifications.
• Inspect the sensor for physical damage or improper installation.
• Check the sensor's electrical connections and wiring.
• Replace the incorrect sensor with the correct one specified by the manufacturer.
• Ensure proper installation and alignment of the sensor.
• Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, wrenches)
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Always use OEM parts for replacements.
• Double-check part numbers before installation.
• Regularly inspect wheel speed sensors for damage.
Sensor Issue
• Ensure the mechanic uses the correct part number for replacements.
• Request a test drive after repairs to confirm the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on sensor replacements.
The C0556 code has been commonly reported in vehicles with recent brake system repairs or sensor replacements.
Moderate – While the vehicle may still be drivable, the ABS and traction control systems may not function properly.
Driving with a malfunctioning ABS system can increase stopping distances and reduce vehicle control in emergency situations.
• Vehicle parked on a level surface
• Ignition in the 'On' position without starting the engine
The right front wheel speed sensor is located near the brake rotor on the right front wheel of the vehicle.
Q: Can I drive with a C0556 code?
A: It's possible to drive, but the ABS and traction control systems may not work properly, which can be unsafe.
Q: How can I prevent this code from appearing?
A: Ensure that the correct parts are used during repairs and that they are installed properly.
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.