Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the car's computer thinks the brake switch is sending a signal that's too strong. It's like if you were talking too loudly into a microphone.
The P0573 code is triggered when the vehicle's Engine Control Module (ECM) detects a high voltage signal from the brake switch circuit.
The brake switch is responsible for sending a signal to the ECM when the brake pedal is pressed. If the ECM detects a voltage level that is higher than expected from the brake switch circuit, it sets the P0573 code. This could mean a problem with the switch itself, the wiring, or the ECM.
• Brake lights may not work
• Cruise control may not engage
• Check Engine Light illuminated
• Faulty brake light switch
• Short circuit in the brake switch wiring
• Faulty ECM
ECM: Engine Control Module, the computer that controls the engine.
Brake Light Switch: A switch that activates the brake lights when the brake pedal is pressed.
• Check the brake light switch for proper operation.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage at the brake switch circuit.
• Replace the brake light switch if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• Multimeter
• Screwdriver set
• OBD-II scanner
$50 - $200
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect brake light operation.
• Check wiring for wear and tear.
• Ensure connectors are free of corrosion.
Sensor Issue
• Do not drive without functioning brake lights.
• Get the issue checked by a professional if unsure.
Brake light switches may be covered under basic vehicle warranty, check with the manufacturer.
This code has been common in vehicles with electronic brake systems and can often be traced to simple wiring issues.
Moderate – It's important to fix this to ensure brake lights and cruise control function properly.
Driving without functioning brake lights is illegal and can be dangerous.
• Vehicle ignition on
• Brake pedal pressed
The brake light switch is usually located near the top of the brake pedal under the dashboard.
Q: Can I drive my car with this code?
A: It's not recommended because your brake lights may not work, which is unsafe.
Q: Will this affect my cruise control?
A: Yes, a faulty brake switch can prevent the cruise control from engaging.
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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Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
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