Quote:
Originally Posted by TreeSemdyZee
And that quote is only referring to one of the sensors. i.e. "Oxygen sensor 2"
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Oxygen sensor 2 refers to both O2 sensors that plug into the cat (i.e. Oxygen sensor 2 Bank 1 and Oxygen Sensor 2 Bank 2). The ones that measure A/F (prior to the cats and plug into the exhaust manifold I believe) are called A/F sensor 1 Bank 1 and A/F sensor 1 Bank 2.
As for what constitutes normal conditions, not really sure but I would guess that refers to the A/F sensors being operational.