What Does P0518 Code Mean?

    OBD-II Code P0518 is defined as a Idle Air Control Circuit Intermittent

    The Idle Control System manages the engine idle speed. To raise or lower the engine Idle speed, the engine control module (PCM), opens or closes the Idle Air Control valve to allow more or less air into the engine. When the PCM cannot achieve the desired RPM, it will set code P0518.

    P0518 Symptoms

    • Engine idle speed is higher than normal
    • Engine stalls when coming to a stop

    Common Problems That Trigger the P0518 Code

    • Idle Air Control (IAC) valve failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

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