DTC P0101: Mass Air Flow Sensor Circuit - Performance: 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 absolute pressure, barometric pressure and engine speed. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:

• ECM malfunction.
• MAF sensor malfunction.
• MAF sensor circuit malfunction.
• Plugged or leaking air intake system.