Ford P0309 OBD-II Trouble Code Definition: P0309 Cylinder 9 Misfire Condition P0309 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0309 Cylinder 9 Misfire Detected What does the code mean? OBD-ii Code P0309 definition: A P0309 code means that the the car’s computer has detected that one of the engine’s cylinders is not firing properly. In this […]