There isn't one.
Yes. It has an O2 sensor on the exhaust y-pipe.
check by the exhaust pipe or catalyst
There isn't one.
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
on the v6 there are 4. bank one and bank two are the o2 sensors on your exhaust manifolds with bank one being the driver side. there is also one before and one after the catalytic converter
yes
don't have the foggiest
it is the rear sensor bank 1 (the one after the converter)
It is right on top of the Catalytic Converter.
I had the same problem on my 98 Mazda 626 and the O2 sensor was faulty.....
o2 sensor maybe