Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble getting the right information from a sensor that helps control the brakes. It's like the car is trying to read a book, but the pages are too faint to see clearly.
The brake pressure sensor measures the pressure applied to the brakes and sends this information to the vehicle's control module. A 'circuit low' code indicates that the sensor is not sending enough voltage or signal.
The C0571 code is triggered when the brake pressure sensor C circuit is detected to have a voltage level below the expected range. This can be due to a faulty sensor, wiring issues, or a problem with the control module.
• ABS warning light on
• Reduced braking performance
• Inconsistent brake pedal feel
• Faulty brake pressure sensor
• Damaged or corroded wiring or connectors
• Faulty control module
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnosis and reporting.
ABS: Anti-lock Braking System, a safety system that prevents wheels from locking up during braking.
• Use an OBD-II scanner to confirm the code.
• Inspect the brake pressure sensor and its wiring for damage or corrosion.
• Test the sensor's voltage and resistance with a multimeter.
• Replace the faulty brake pressure sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Keep electrical connections clean and free of corrosion.
• Perform routine maintenance checks.
Sensor Issue
• Have your brakes checked by a professional.
• Avoid driving in conditions that require heavy braking until repaired.
Check if the brake system components are covered under the vehicle's warranty.
This code is commonly reported in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – While the vehicle may still be drivable, braking performance could be compromised.
Driving with compromised braking can be dangerous. Address the issue promptly to ensure safety.
• Vehicle stationary
• Engine running
The brake pressure sensor is typically located near the brake master cylinder or within the ABS module.
Q: Can I drive with a C0571 code?
A: It's not recommended, as braking performance may be affected. Have it checked as soon as possible.
Q: Will the ABS light turn off after the repair?
A: Yes, once the issue is fixed and the code is cleared, the ABS light should turn off.
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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