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mdvin21 2/10/2013
2002 Hyundai Accent GL 4Cyl1.6L - Engine
'02 Hyundai Accent - Where is the IAT sensor on this car???
Error code P0111 diagnosed at 2 auto parts stores. Can't find much of anything related to an IAT on the 2002 Accent. Is it combined with the MAP sensor or something?? I'm car illiterate, but thought I could at least handle this problem.
2 Answers
  • Jimm
    Jimm 2/10/2013
    P0111 = Intake Air Temperature (IAT) Circuit Range/Performance Problem

    What does that mean?The IAT (Intake Air Temperature) sensor is a thermistor that varies resistance based upon the temperature of the engine intake air. Usually a two wire sensor. One wire is supplied 5 Volt from the PCM (Powertrain Control Module) and the other is a ground. The PCM monitors the change in the 5 Volt supplied to determine air temperature. When the intake air is cold, the resistance is high, resulting in a high signal voltage.

    When the intake air is warm, the reistance is low, resulting in a low signal voltage. This code means that the PCM saw a larger-than-normal change in a shorter-than-expected time on the IAT signal circuit.

    Since this code is likely pointing to an intermittent problem on the IAT circuit, there may not be any symptoms at present. However, the MIL will likely be on. The car MAY exhibit some driveability problems, but it is more likely that there will be no noticeable symptoms to the driver.

    Potential causes of the P0111 DTC include:

    a faulty IAT sensor
    an open in the signal or ground circuit
    a short to ground on the signal circuit
    poor connection at sensor or PCM

    Possible Solutions:





  • HouseCallAuto
    HouseCallAuto 2/10/2013
    Replace the Mass Air Flow sensor. The IAT is integral with this sensor.

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