2006 Mazda MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE

DTC P0111: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P0111)

DTC P0111 IAT sensor circuit range/performance problem
DETECTION CONDITION 
  • If intake air temperature is higher than engine coolant temperature by 18°C {32.4°F} for 1.2 s  with ignition switch on*, the PCM determines that there is a intake air temperature sensor circuit range/performance problem.
*: Ignition switch on when 6 h  or more has passed since the previous ignition switch offDiagnostic 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 
  • IAT sensor malfunction
  • Connector or terminal malfunction
  • PCM malfunction
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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.
  • • You are not confident in the next step or safety outcome.