Diagnostic trouble code P0572 indicates that the voltage signal from the cruise control/brake switch A circuit is lower than expected. The cruise control system uses this circuit to disengage the cruise control system when the driver applies the brakes.
When the ECM detects that the voltage signal from the cruise control/brake switch A circuit is lower than expected, it will set a diagnostic trouble code P0572 and turn on the Check Engine light. This may cause the cruise control system to become inoperative or to function incorrectly.
The most common causes of this code include a faulty cruise control/brake switch A, a damaged wiring harness, or a failed ECM. To diagnose and repair this code, a mechanic will need to perform a thorough inspection of the cruise control/brake switch A circuit and related components to determine the exact cause of the malfunction.
Once the issue is identified and repaired, the mechanic will clear the diagnostic trouble code and reset the Check Engine light. It is important to address this issue promptly as a malfunctioning brake switch can potentially affect the vehicle's ability to stop, which can result in unsafe driving conditions.
