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 having trouble talking to the sensor that tells it when you're pressing the brake pedal.
The brake pedal position sensor monitors the position of the brake pedal and sends this information to the vehicle's computer. If there's an issue with the circuit or the sensor itself, this code is triggered.
The P057A code indicates that the vehicle's computer has detected an open circuit or a malfunction in the brake pedal position sensor 'A'. This sensor is responsible for providing data about the position of the brake pedal to the engine control module (ECM).
• Brake lights may not function properly
• Cruise control may not work
• Warning light on the dashboard
• Faulty brake pedal position sensor
• Damaged or corroded wiring or connectors
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Inspect the brake pedal position sensor for damage.
• Check the wiring and connectors for corrosion or damage.
• Test the sensor's output with a multimeter.
• Replace the brake pedal position sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect sensor wiring for damage.
• Keep connectors clean and free of corrosion.
• Ensure brake system maintenance is up to date.
Sensor Issue
• Have the vehicle inspected by a professional if you notice any brake light issues.
• Avoid using cruise control until the issue is resolved.
Check with the vehicle manufacturer as some brake system components may be covered under warranty.
This code has been reported in vehicles with high mileage or those exposed to harsh environmental conditions.
Moderate – While the vehicle may still be drivable, brake system issues should be addressed promptly to ensure safety.
Driving with malfunctioning brake lights can lead to accidents and may be illegal in some areas.
• Vehicle parked on a level surface
• Ignition in the 'ON' position without starting the engine
The brake pedal position sensor is typically located near the brake pedal assembly under the dashboard.
Q: Can I drive with a P057A code?
A: It's not recommended as it may affect brake light operation and cruise control functionality.
Q: Will this code affect my vehicle's braking performance?
A: The code itself doesn't affect braking performance, but it may cause brake lights to malfunction, which is a safety concern.
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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