What does error code PO 581 on the Ford Explorer mean?

Error code P0581 on a Ford Explorer indicates a problem with the cruise control system, specifically related to the throttle position sensor or the cruise control switch. This code typically signifies that there is an issue with the cruise control's ability to maintain speed, potentially due to a malfunctioning component or a wiring issue. It’s advisable to inspect the cruise control system, including the throttle position sensor and related wiring, to diagnose and resolve the issue.