DTC P0101:00: Notes

• When the conditions are as follows, the PCM compares the intake airflow amount with the estimated intake airflow amount (calculated from the barometric pressure, MAP sensor and throttle opening angle).

  MONITORING CONDITIONS 

  • Engine speed: 500-4, 00 RPM 
  • Barometric pressure: 105-180 kPa {1.08-1.83 kgf/cm ²  , 15.3-26.1 psi} 
  • Throttle position-throttle position before 25 ms: below 1.22%  (boost air temperature less than 20°C {68°F}), below 30%  (boost air temperature more than 20°C {68°F}) 
  • Battery voltage: above 8 V 
• If over a period continuing for 5 s  , the cumulative value of the intake airflow amount divided by the estimated intake airflow amount is 1.35 or more  , the PCM determines that the detected mass airflow amount is above is too high.
• If over a period continuing for 5 s  , the cumulative value of the intake airflow amount divided by the estimated intake airflow amount is 0.65 or less  , the PCM determines that the detected mass air flow amount is above is too low.

Diagnostic support note 

• This is a continuous monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• DTCs are stored in the PCM memory.

• Air restriction or leakage in intake-air system (between MAF sensor and intake manifold)
• MAF sensor malfunction
• Turbocharger malfunction (turbine wheel/compressor damaged, stuck)
• MAF/IAT sensor connector or terminals malfunction
• Electrical corrosion in MAF/IAT RETURN circuit
• Voltage drops in the ground circuit
• PCM connector or terminals malfunction
• PCM malfunction