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Home >> Suzuki >> 2006 >> XL-7 Base, RWD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0171 / P0174: System Too Lean >> DTC Detecting Condition and Trouble Area
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DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION AND TROUBLE AREA CHART

DTC detecting condition Trouble area
When running after engine warmed (2 driving cycle detection logic).
  • Short term fuel trim exceeding 15% or long term fuel trim exceeding 20% and total trim exceeding 43% is detected.
    • Fuel system too lean
  • Vacuum leaks (air inhaling)
  • Exhaust gas leakage
  • Heated oxygen sensor malfunction
  • Fuel pressure out of specification
  • MAF sensor poor performance
  • ECT sensor poor performance
  • Fuel level sensor.
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