DTC P0171 System Too Lean (Bank 1); DTC P0174 System Too Lean (Bank 2): DTC Detecting Condition

DTC DETECTING CONDITION

Item	Detecting Condition	Possible Cause
DTC Strategy	Monitoring deviation of fuel control	Air leakage Leaking EVAP system Low fuel pressure Faulty sensor signals
Enable Conditions	Estimated canister loading > -11% Estimated altitude < 8000ft Coolant temp. > 60°C (140°C) Fueling adaptation > 23% or < -23%
Threshold Value	Lambda controller+Trim value > 22% more than 60sec within 400sec.
Diagnostic Time	400 sec.
MIL On Condition	2 Driving Cycles