• Brake lights may stay on
• Cruise control may not work
• Check Engine Light may illuminate
• Faulty brake switch
• Wiring issues such as short circuits or open circuits
• Faulty PCM (Powertrain Control Module)
PCM: Powertrain Control Module, the car's main computer that controls engine and transmission functions.
Brake Switch: A device that signals the car's computer when the brake pedal is pressed.
• P0703
• P0704
Brake Switch B Circuit High
This code means that a part of the car that tells the computer when you're pressing the brake pedal is not working right. It's like when a light switch is stuck and won't turn off.
The P0724 code indicates that the brake switch 'B' circuit is sending a high voltage signal to the car's computer, which is not expected when the brake pedal is not being pressed.
The brake switch 'B' circuit is responsible for sending signals to the vehicle's Powertrain Control Module (PCM) about the status of the brake pedal. A 'high' signal typically indicates an electrical fault, such as a short circuit or a faulty brake switch, which can lead to improper functioning of systems that rely on brake input.
• Use an OBD-II scanner to confirm the code
• Inspect the brake switch and its wiring for damage
• Test the brake switch with a multimeter
• Replace the faulty brake switch
• Repair or replace damaged wiring
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Screwdriver set
$50 - $200
Moderate
• Honda Accord
• Toyota Camry
• Ford Focus
• Regularly inspect brake system components
• Ensure brake lights function properly
• Address electrical issues promptly
Sensor Issue
• Do not ignore the Check Engine Light
• Have a professional inspect the brake system
• Avoid using cruise control until resolved
Check your vehicle's warranty for coverage on electrical components.
This code has been commonly associated with faulty brake switches in older vehicles.
Moderate – While the vehicle is still drivable, safety systems like cruise control may be affected.
Driving with malfunctioning brake lights can be illegal and unsafe.
• Vehicle ignition in the 'on' position
• Brake pedal not pressed
The brake switch is typically located near the top of the brake pedal arm under the dashboard.
Q: Can I drive with a P0724 code?
A: While you can drive, it's not recommended as safety features like brake lights might not work properly.
Q: How do I reset the Check Engine Light?
A: After repairs, use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
