What Does P0209 Mean? OBD-II Code Decreased engine performance is defined as a Injector Circuit/Open - Cylinder 9 The engine control module (PCM) has special transistors called "drivers" to turn the Fuel Injectors on and off in the Fuel Injection System. If the PCM cannot control the fuel injector, it will set code P0209. engine code P0209P0209 fixobd P0209dtc P0209obd code P0209obd2 P0209P0209 car codediagnostic code P0209car code P0209check engine code P0209fehlercode P0209P0209 fiatcodigo P0209codigo falla P0209P0209 kody b??dówcodigo de falla P0209 What are the common causes of P0209 ? The most common cause of this code is damage to wiring caused by wildlife. The warm area atop the engine provides shelter for small animals, where they proceed to gnaw the wiring for some strange reason. Other causes include a faulty fuel injector, corroded electrical wiring or connector faces, or a faulty fuel injector driver in the PCM. How do you troubleshoot P0209 ? Replacing the ECM Repairing or replacing the wiring harness Replacing the fuel injector for cylinder 9 (most common) Fixing connection issues Searches related to P0209 - Injector Circuit Malfunction Cylinder 9 P0208 P0210