DTC Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
Case 1	DTC Strategy	Characteristic line strong shift to rich	Poor connection or damaged harness Front HO2S
	Enable Conditions	Upstream O2 sensor operative readiness is detected. Downstream O2 sensor operative readiness is detected. Active test is not activated. Catalyst purge after fuel cut-off is not activated. Engine speed is faster than 6000 RPM. Mass air flow is less than 83 g/sec. Exhaust gas temperature (model) is between 300°C (572°F) and 800°C (1, 472°F). Stable driving condition: Difference between actual RPM and filtered RPM is less than 500 RPM. Difference between actual air mass and filtered air mass is less than 0.4 g/rev. Difference between actual lambda and filtered lambda is less than 15%.
	Threshold Value	Upstream lambda (rich) is lower than 0.9, downstream O2 signal (lean) is lower than 0.2V When above conditions are fulfilled, mass air flow is integrated. Malfunction is detected when the accumulated mass air flow reaches 300 g.
	Diagnosis Time	5 ~ 100 seconds. (depends on intake air mass)
Case 2	DTC Strategy	Characteristic line middle shift to lean
	Enable Conditions	No fuel cut-off No full load No catalyst overheating protection Battery voltage is between 11V and 16V.
	Threshold Value	Active test symptom during shift of lambda set point to lean (after P2096 detection) Lambda value is lower than 1.05 when lambda set point is 1.15.
	Diagnosis Time	10 seconds after lambda set point shift to corresponding side.
MIL On Condition		2 Driving Cycles