DTC P2270 O2 Sensor Signal Stuck Lean (Bank 1 / Sensor 2): DTC Detecting Condition

WARNING: This page is about a different car, the 2007 Kia Spectra5 and 2007 Kia Spectra. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION AND POSSIBLE CAUSE

Item	Detecting Condition	Possible Cause
DTC Strategy	Plausibility check during shift of lambda set point to rich or lean	Three Way Catalytic Converter (TWC) Air leakage in exhaust system Rear HO2S
Enable Conditions	No fuel cut-off No full load phase No fuel trim error detected Delay time to start diagnosis : 13 ~ 30 sec., depending on operation point 11V < Battery voltage < 16V No relevant failure
Threshold Value	Rear HO2S signal < 0.75V when lambda set point = 0.80
Diagnostic Time	30 sec.
Mil On Condition	2 Driving Cycles