2000 Chrysler 300 Trouble Code P0140

Usually with a v6 there is 4 two upstream one for each bank and one for each after the cat down stream. Where were the sensors you changed?facing the engine right left side?In the exhaust manifold down by the cat?

Just checked there is four like I said.

Hi,

I had purchased 4 sensors to replace all 4. However my mechanic
Told me that the car has 2 oxygen sensors only. So the two sensors which are each on either side of the engine visible from top view were changed.

I kept insisting that there are 2 more sensors to be changed
but couldn't indicate the location myself as neither my mechanic nor me knows the location.

So the 2 remaining oxygen sensors are still with me. We just don't know where the downstream sensors are located as we looked and looked but couldn't find the location of the downstream sensors.

I have seen a diagram view online that pertains to show
2 downstream sensors but my car doesn't seem to show them.

P0140 is bank 1 sensor 2 thats the down stream one says its the right hand side passenger side located right behind the catalytic convertor. It should be there.

Do u on have a diagram to indicate the location of both downstream sensors
I will print and show it to the mechanic as he keeps insisting the car has 2 sensors total

I posted the only diagram my online repair info shows its not a good diagram of where the sensor is.i would get another person to work on your car there has to be a down stream sensor.you just follow the pipe down its by your cat.If they work on cars for a living they should be able to find it.