Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the switch that tells your car when you press the brake pedal. It's like when a light switch doesn't work and the light doesn't turn on.
The P0571 code indicates an issue with the brake switch circuit, which is responsible for sending signals to the car's computer when the brake pedal is pressed.
The brake switch, also known as the brake light switch, is an electrical component that activates the brake lights and communicates with the vehicle's computer systems. When the brake pedal is pressed, the switch closes the circuit, sending a signal to the engine control module (ECM). If the ECM detects an abnormal voltage or no signal from the switch, it triggers the P0571 code.
• Brake lights not working
• Cruise control not functioning
• ABS light illuminated on the dashboard
• Faulty brake light switch
• Damaged or corroded wiring/connectors
• Blown fuse related to the brake light circuit
ECM: Engine Control Module
ABS: Anti-lock Braking System
• Inspect the brake light switch for physical damage.
• Check the wiring and connectors for corrosion or damage.
• Test the brake light switch with a multimeter for proper function.
• Replace the faulty brake light switch.
• Repair or replace damaged wiring/connectors.
• Replace any blown fuses in the brake light circuit.
• Multimeter
• Screwdriver set
• Socket set
$50 - $150
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect brake light functionality.
• Check and maintain electrical connections.
• Replace brake light bulbs as needed.
Sensor Issue
• Check your brake lights regularly to ensure they are functioning.
• If your cruise control stops working, consider checking the brake switch.
Check with your vehicle manufacturer for warranty coverage on electrical components.
The P0571 code has been a common issue in vehicles with electronic brake systems, especially as cars have become more reliant on electronic components.
Moderate – While the vehicle can still be driven, the brake lights may not function, posing a safety risk.
Driving without functioning brake lights is illegal and can lead to accidents. Address this issue promptly.
• Vehicle ignition in the 'ON' position.
• Brake pedal pressed.
The brake light switch is typically located near the top of the brake pedal arm, under the dashboard.
Q: What happens if I ignore the P0571 code?
A: Ignoring this code can lead to brake lights not working, which is a safety hazard and could result in a traffic ticket.
Q: Can I fix the P0571 code myself?
A: If you're comfortable working with car electronics, you might be able to replace the brake light switch yourself. Otherwise, it's best to consult a professional.
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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