Description OBD-II Trouble Code Description for P0573 Opel Brake Switch “A” Circuit High What does this mean? OBD2 Code P0573 Opel definition: When the brake pedal is depressed, the stop light switch sends a signal to the ECM. When the ECM receives this signal, it cancels the cruise control. A fail safe function is provided … Continue reading Opel P0573 Cruise Control/Brake Switch A Circuit High