Ford P1121 OBD-II Trouble Code Definition: P1121 Electric Throttle Control Actuator P1121 Ford OBD-II Trouble CodeDescription: Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1121 OBD Code Description Electric Throttle Control Actuator is one of the definitions for the P1121; however your vehicle’s manufacturer may have a different definition for the P1121 code. […]