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 mean?
The brake switch tells the PCM that the brake pedal is depressed. If the PCM detects an issue with the operation of the brake light switch, then code P0571 might be logged. This code might also be logged if the PCM detects a malfunction within the cruise control/brake switch “A” circuit.
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.
How do you test a cruise control brake switch?
The Brake/Cruise Control Switch
A multimeter or a test light can be used to test a brake switch. With the brake pedal released, there should be voltage entering the switch, and no voltage out. After pressing the pedal in and completing the circuit, the voltage should be coming in to and out of the brake light switch.
How do I fix P0571 code?
What repairs can fix the P0571 code?
- Electrical components and connections will be inspected for signs of damage or wear.
- Any wires or connections that do not appear to be in good working order will be repaired or replaced.
- Once the wiring is all in good shape, the mechanic will inspect the brake pedal and brake switch.
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.