What Does P2099 Code Mean?

    OBD-II Code P2099 is defined as a Post Catalyst Fuel Trim System Too Rich

    The engine computer (PCM) monitors the amount of oxygen left over in the exhaust stream after the catalytic converter. If there is an excessive amount of oxygen left over, code P2099 will be set.

    P2099 Symptoms

    • Increased fuel consumption

    Common Problems That Trigger the P2099 Code

    • Exhaust leak
    • Oxygen sensor failure
    • Wiring issue

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