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

• ECM (PCM) malfunction.
• MAF sensor malfunction.
• MAF sensor circuit malfunction (high resistance).
• Plugged or leaking air intake system.