LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2019 >> Forte FE, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 6) >> DTC P0171-00: System Too Lean (Bank 1) >> DTC Information >> DTC Detecting Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Fuel trim value monitoring
  • Air leakage
  • Improper fuel pressure
  • PCV valve stuck
  • Clogging of injector
  • Fuel system
Enable Conditions
  • No Failure detection for DTCs
  • Closed loop fuel control
  • ECTS > 60°C (140°F)
Threshold Value
  • STFT value at MAX limit for more than 40 seconds of total monitoring time
  • SFTF >50%
Diagnostic Time
  • 90s
MIL ON Condition
  • 2 driving cycles
scientia non olet · About LEMON Manuals