P0571 BUICK code

What the P0571 code means. P0571 is the OBD-II generic code for a problem with the switch connected to the brake pedal that deactivates the cruise control system in the vehicle. If this switch is not functional, the cruise control may not operate.

What is brake switch malfunction?

An electrical malfunction usually triggers the P0571 code, but it can be prompted by something as simple as dirt on a connector, even if the rest of the brake switch is working fine. Here are some common culprits: A fault within the brake switch circuit, like a wiring issue. A defective brake switch connector.

What does brake switch a circuit high mean?

The P0573 code is defined as “Cruise Control / Brake Switch A Circuit High” and indicates a high voltage signal malfunction in the cruise control brake switch (stop light switch). The letter designation “A” can point to a particular component like a wiring harness, connector and so on.

What is a brake switch circuit?

What is a brake light switch? Your brake light switch is a simple spring-loaded switch that is held open by a tab on the brake pedal, keeping the brake lights off. When you push the pedal down, the spring causes the switch to close, completing the electrical circuit and turning on the brake lights.

How do I fix code P0572?

How Is the Code P0572 Fixed?

  1. Adjusting the brake light switch.
  2. Replacing a blown fuse (or fuses).
  3. Replacing a defective brake pedal and brake light switch.
  4. Replacing or repairing faulty wiring, connectors, and so on.
  5. Replacing a faulty cruise control module.

How do you test a brake pedal position sensor?

Place the sensor on just one of the two wires and hold the brake pedal down as you do so. Then test the other wire. If power is connected and the switch is working properly, the test bulbs will illuminate. If it doesn’t light up, the brake light switch is faulty and will need to be replaced.