DTC P0171: System Too Lean (Bank 1): 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 Condition	Estimated canister loading < 1 Lambda control active
Threshold Value	Lambda controller+Trim value > 36% The above condition is met for more than 60 sec. within 180 sec.
Diagnostic Time	60 seconds
Fail Safe	EVAP. Emission control function is controlled in minimum operation mode.