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 get a good signal from the sensor that tells how fast the right front wheel is spinning.
The C0508 code indicates a problem with the signal from the right front wheel speed sensor, which is reading lower than expected.
The wheel speed sensor is responsible for sending the speed of each wheel to the vehicle's computer. The C0508 code is triggered when the sensor for the right front wheel sends a signal that is below the expected range, indicating a potential issue with the sensor, wiring, or connector.
• ABS warning light illuminated
• Traction control light on
• Inoperative ABS or traction control system
• Faulty right front wheel speed sensor
• Damaged or corroded wiring or connectors
• Faulty ABS control module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, second generation
• Inspect the right front wheel speed sensor and its wiring for damage.
• Check the sensor connector for corrosion or loose connections.
• Use a multimeter to test the sensor's output voltage.
• Replace the right front wheel speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ABS control module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel speed sensors and wiring.
• Keep the wheel area clean to prevent debris buildup.
• Perform regular maintenance checks on the ABS system.
Sensor Issue
• Do not ignore the ABS warning light; address the issue promptly.
• Drive cautiously if the ABS system is not functioning.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on ABS components.
Wheel speed sensor issues are common in vehicles with high mileage or those exposed to harsh conditions.
Moderate – The vehicle can be driven, but ABS and traction control may not function properly.
Operating a vehicle with a malfunctioning ABS system can increase stopping distances and the risk of skidding.
• Vehicle stationary
• Ignition on
The right front wheel speed sensor is located near the wheel hub assembly on the right front wheel.
Q: Can I drive with a C0508 code?
A: Yes, but be cautious as the ABS and traction control may not work properly.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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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