Ford P0271 OBD-II Trouble Code Definition: P0271 Cylinder 4 Injector Circuit High P0271 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0271 Cylinder 4 Injector Circuit High What does the code mean? OBD-ii Code P0271 definition: Code P0271 is triggered when the Power Train Control Module (PCM) detects a high voltage in the Fuel Injector #4 Circuit. […]