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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 57 (Engine Control System Diagnosis (2 Of 2) (HEV)) >> DTC P2191: System Too Lean At Higher Load (Multiple) (Bank 1) >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Monitoring deviation of long term fuel trim control in part load
  1. Air leakage in intake, exhaust or EVAP system
  2. Faulty PCV system
  3. Faulty sensor signals
  4. Fuel system
Enable Conditions
  • No relevant failure
  • Lambda adaptation active
  • Coolant Temp. > 73°C(163°F)
Threshold Value
  • Part load long term fuel trim > +25%
Diagnostic Time
  • 90 sec.
MIL On Condition
  • 2 Driving Cycles
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