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What Does P0203 Code Mean?

    OBD-II Code P0203 is defined as a Injector Circuit/Open - Cylinder 3

    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 P0203.

    P0203 Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P0203 Code

    • Fuel injector failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P0203 Code

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