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

VOLTAGE SPECIFICATION CHART

Test Condition	HO2S Voltage (Sensor1)	HO2S Voltage (Sensor2)
HO2S Signal at idle after warm-up	Signal is commonly switching from rich to lean more than 3 times in 10 sec.	Signal is commonly above 0.6V.
HO2S signal at open circuit (Pumping current OFF)	Approx. 0.45V
HO2S signal at open circuit (Pumping current ON)	Approx. 3.5V