2006 Mazda MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE

DTC P0101: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P0101)

DTC P0101 MAF sensor circuit range/performance problem
DETECTION CONDITION 
  • PCM monitors mass intake air flow amount when the engine is running.
    • If the mass intake air flow amount is above 37 l/s  for 5 s  and the engine speed is below 2,000 rpm  with the engine running, the PCM determines that the detected mass intake air flow amount is too high.
    • If the mass intake air flow amount is below 4.4-59 l/s  (The value depends on engine speed.) for 5 s  and the engine speed is above 1,000 rpm  with the engine running and the throttle opening angle above 50%  , the PCM determines that detected the mass intake air flow amount is too low.
Diagnostic support note 
  • This is a continuous monitor (CCM).
  • The 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 is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • MAF sensor malfunction
  • Electrical corrosion in MAF RETURN circuit
  • Voltage drops in ground circuit
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
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