The P0571 trouble code indicates a malfunction in the cruise control or brake switch A circuit. This code is specific to vehicles equipped with cruise control systems and typically indicates an issue with the brake pedal position switch, which is used to deactivate the cruise control system when the brakes are applied.
P0571 Cruise Control/Brake Switch A Circuit Malfunction
Code symptoms P0571.
1. Inoperative cruise control system.
2. Difficulty engaging or disengaging cruise control.
3. Difficulty adjusting speed while using cruise control.
4. Illumination of the Check Engine Light.
5. Other cruise control-related trouble codes may be present.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0571.
1. Faulty cruise control or brake switch A.
2. Wiring issues in the cruise control or brake switch A circuit.
3. Faulty cruise control module.
4. Faulty brake pedal position sensor.
Code Solutions P0571.
1. Begin by visually inspecting the cruise control or brake switch A and its wiring for any signs of damage or corrosion. Repair or replace any damaged components as needed.
2. Use a digital multimeter to test the cruise control or brake switch A for proper continuity and operation. Replace the switch if it is faulty.
3. Check the wiring harness for continuity and resistance. Repair or replace any damaged wiring.
4. If the switch and wiring are in good condition, test the cruise control module for proper operation using a scan tool that can communicate with the module. Replace the module if it is faulty.
5. Finally, test the brake pedal position sensor to ensure it is sending the correct signals to the cruise control module. Replace the sensor if it is faulty.