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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Control System Diagnosis - 3.3L (1 Of 9)) >> DTC P0071-00: 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
DTC Strategy
  • Plausibility check
  1. Faulty AAT
Enable Conditions Hot
  • Intake temperature change during 12 seconds is lower than 1.5°C (34.7°F)
  • Engine coolant temperature is between 74°C (165.2°F) and 142°C (287.6°F)
  • Engine RPM is between 1500 RPM and 4000 RPM
  • Mass air flow is between 0.45 g/rev and 1.8 g/rev.
  • Pressure quotient (MAP/BARO) is less than 2
  • Heat stored in intake manifold is less than 100
  • Vehicle speed is higher than 43.5 mph and lower than 81 mph
Cold
  • Battery voltage is between 11V and 16V
  • Engine stop time is longer than 480 min.
  • ECT decrease in 15 seconds after engine start is less than 2°C (35.6°F)
Threshold Value
  • Diagnosis when the ambient air temp. value is higher or lower than model temperature
    • Hot condition: Difference between ambient air temp. sensor and model value is larger than 30°C (86°F)
    • Cold condition: Difference between ambient air temp. sensor and intake temp. model value is larger than 20°C (68°F)
Diagnosis Time
  • Immediate
MIL On Condition
  • 2 driving cycles