Ford P1144 OBD-II Trouble Code Definition: P1144 Air Assist Control Valve Circuit Malfunction P1144 Ford OBD-II Trouble CodeDescription: Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1144 OBD Code Description Air Assist Control Valve Circuit Malfunction is one of the definitions for the P1144; however your vehicle’s manufacturer may have a different definition […]