Ford P0304 OBD-II Trouble Code Definition: P0304 Cylinder 4 Misfire Detected P0304 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0304 Cylinder 4 Misfire Detected What does the code mean? OBD-ii Code P0304 definition: A P0304 code means that the the car’s computer has detected that one of the engine’s cylinders is not firing properly. In this […]