DTC P0101: Mass Air Flow Sensor - Performance Problem: Condition

DTC is set when intake air flow measured by Mass Air Flow (MAF) sensor does not agree with intake air flow calculated by Engine Control Module (ECM) using manifold differential pressure, barometric pressure and engine speed. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:

• Plugged or leaking air intake system.
• High resistance in MAF sensor circuits.
• MAF sensor malfunction.
• Manifold Differential Pressure (MDP) sensor malfunction.
• ECM malfunction.