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What Does P2177 Code Mean?

    OBD-II Code P2177 is defined as a System Too Lean Off Idle

    The engine control module (PCM) uses multiple sensors to determine the required amount of fuel needed to keep the engine running efficiently. If the PCM cannot achieve the desired balance between fuel and air, it will set code P2177.

    P2177 Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P2177 Code

    • Damaged or contaminated spark plug
    • Engine sensor failure
    • Exhaust leak
    • Fuel injector failure
    • Fuel pump failure
    • Powertrain Control Module (PCM) software needs to be updated
    • The fuel does not meet the manufacturer's requirements
    • Vacuum leak

    Common Repairs Needed for the P2177 Code

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