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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 95 (Engine Control System Diagnosis - 1.6L (1 Of 3) - Optima (Except HEV)) >> DTC P0071: Ambient Air Temperature Circuit Range/Performance >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
Case 1 DTC Strategy
  • Rationality check
  1. Poor connection
  2. AATS
Enable Conditions
  • Vehicle speed is greater than 40km/h
  • Mass air flow is greater than 40kg/h and less than 60~220kg/h
  • ECT is greater than 60 °C (140 °F)
  • Duration of NO fuel cut off is greater than 50s
Threshold Value
  • Absolute difference between of modeled AAT and AAT is greater than 20 °C (68 °F)
Diagnostic Time
  • 5s
Case 2 DTC Strategy
  • Plausibility check
  • Monitor at cold condition
Enable Conditions
  • Soaking time engine stop ECT 0 °C (32 °F) is greater than 5hr
  • Soaking time engine stop ECT 90 °C (194 °F) is greater than 7hr
  • Block heater not detected
  • ECT less than 50 °C (122 °F)
  • Absolute difference between of ECT at start and ECT is less than -3 ° C (26.6 °F)
  • 30s after engine start
Threshold Value
  • Difference between of Ref. Temp and AAT (at cranking) is greater than 20 °C (68 °F)

    * Ref. Temp: 2 of 3 signals are selected and averaged, and the other signal which has the biggest deviation is excluded

Diagnostic Time
  • 5s
MIL ON Condition
  • 3 driving cycles