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What Does P2078 Code Mean?

    OBD-II Code P2078 is defined as a Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit

    The Intake Manifold Tuning Valve allows the engine computer (PCM) to allow for increased airflow through the engine at higher engine speeds. The PCM uses an Intake Manifold Tuning Valve position sensor to confirm the Intake Manifold Tuning Valve is performing as requested. If the PCM sees an implausible signal from the position sensor, code P2078 will be stored. The position sensor is built into the valve assembly.

    Common Problems That Trigger the P2078 Code

    • Intake manifold tuning valve failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
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