The oxygen sensor on a 1999 Oldsmobile Intrigue 3.3 liter is in the exhaust manifold/pipes
The O2 sensors are screwed into the exhaust system. Follow the exhaust backward from the engine and you will find the sensors.
Two but the upper would be the one to cause problems
The 4.0 liter OHV engine has ( 3 ) The 4.0 liter SOHC engine has ( 4 ) The front ( 2 ) oxygen sensors are used in the adjustment of the engine air / fuel ratio
Two. One before, and one after catalytic converter.
The TCM is the transmission control module and it has nothing to do with oxygen sensors!
I have a 1999 Oldsmobile Intrigue 3.5 liter, I will like to know were the Timing chain marks.
That Vehicle has 2 oxygen sensors.
Four
Four
2
Exhaust system.
There are two.