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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) - HEV >> DTC P0111: Intake Air Temperature Sensor 1 Circuit Range Performance >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Plausibility check
  1. Poor connection or damaged harness
  2. Faulty IAT sensor
Enable Conditions Case1
  • Engine running
  • Battery voltage > 6V
  • No relevant failure
  • Engine Coolant Temp. ≥ 73°C(163°F)
  • ECT at engine start - ECT at Eng. stop at previous driving cycle > 5.3°C(41.5°F)
  • Cumulative time for IAT signal increase check (low load driving condition: air flow < 20kg/h) > 200 sec.
  • Cumulative time for IAT signal decrease check (high load driving condition: air flow > 40kg/h) > 160 sec.
Case2
  • Ignition "ON"
  • Battery voltage ≥ 6V
  • No Intake Air Temp.(IAT) sensor electrical error
Threshold Value Case1
  • Signal stuck: Intake air temperature signal variation

    since Engine Start < 1.5 °C ~ 40 °C
Case2
  • Noisy signal: IAT - IAT moving mean value > 8 °C
Diagnostic Time Case1
  • Immediate
Case2
  • 0.5 sec.
MIL On Condition
  • 2 Driving Cycles
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