Oxygen Sensor Bank 1 Sensor 2
WARNING: This page is about a different car, the 2008 Suzuki Reno, 2008 Suzuki Forenza, 2007 Suzuki Reno, and 2007 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
The Heated Oxygen Sensor 2 (HO2S2) represents the exhaust oxygen output voltage past the catalytic converter.
This voltage remains inactive, or the voltage will appear lazy within a range of 100 mV (lean exhaust) and 900 mV (rich exhaust) when operating in a Closed Loop.