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 has detected a problem with the sensor that checks the temperature of a part that helps you stop the car. It's like when a thermometer stops working and can't tell you the temperature anymore.
The code C057B indicates that there is an issue with the circuit of the Brake Booster Temperature Sensor B, which may be open or have a fault.
The Brake Booster Temperature Sensor B monitors the temperature of the brake booster, which is a component that helps increase braking force. An open circuit or fault in the sensor can cause inaccurate readings or no readings at all, affecting brake performance.
• Brake warning light on dashboard
• Reduced braking performance
• Unusual brake pedal feel
• Faulty Brake Booster Temperature Sensor B
• Damaged wiring or connectors
• Faulty Engine Control Module (ECM)
Brake Booster: A device that uses vacuum or hydraulic pressure to increase the force applied to the brake pedal.
ECM: Engine Control Module, the computer that controls engine functions.
• Check for any other related codes.
• Inspect the wiring and connectors for damage.
• Test the Brake Booster Temperature Sensor B for proper operation.
• Replace the Brake Booster Temperature Sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Ensure proper maintenance of electrical connections.
• Schedule routine diagnostic checks.
Sensor Issue
• Do not ignore the brake warning light.
• Have your vehicle inspected by a professional if you notice any braking issues.
Check with your vehicle manufacturer for specific warranty coverage on brake components.
This code has been associated with vehicles that have electronic brake systems, particularly in models with advanced braking technology.
High – Brake issues can compromise vehicle safety and should be addressed immediately.
Driving with impaired brakes is dangerous and may violate traffic laws. Ensure your vehicle is safe to operate.
• Vehicle at operating temperature
• Brake system engaged
The Brake Booster Temperature Sensor B is typically located near the brake booster assembly, usually in the engine compartment.
Q: Can I drive with a C057B code?
A: It's not recommended to drive with this code as it can affect braking performance.
Q: How can I clear the C057B code?
A: You can clear the code with an OBD-II scanner after addressing the underlying issue.
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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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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