Ford P0506 OBD-II Trouble Code Definition: P0506 Idle Air Control System RPM Lower Than Expected Large vacuum leak on engine P0506 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0506 Idle Air Control System RPM Lower Than Expected What does the code mean? OBD-ii Code P0506 definition: This P0506 code is one that’s sometimes triggered on vehicles […]