Codak

I keep getting a p0432 code which is bank 2 o2 sensor. I have a 2001 so 4 o2 sensors. Which o2 sensor is bank 2? Id assume it is one of the rear ones but pre or post cat? I also looked up that everyone uses NTK o2 sensors but they seem to be out of stock everywhere and no longer available. Which other brand would work? Thanks

exasemech

If I recall P0432 is a catalyst efficiency code rather than a 02 sensor code. The O2 sensor codes do generally tell you if it's the upstream or downstream sensor

Ralph77

Are you saying that the code is for Bank 2 Sensor 2?
Cause if it is that is the rear downstream
Now don't get all nervous but betting you need a new dual cat.
Had a P0432 myself a few years back.
There are all sorts of things it could be.
IIRC everything from O2 sensor to fuel trims to exhaust leaks etc.
Jeep ran fine but spent quite some time ruling out everything best I could.
Finally broke down and bought a new front cat.
Needed a muffler and a tail pipe anyway so said screw it and bought a whole new exhaust.
Used all Walker parts.
Been fine ever since.
My store, Napa, has all of them except the 23506. Which is Bank 2 Sensor 1.
2 of the remaining 3 could be had today which means our local warehouse has them.
One tomorrow which means one of the closer out of state warehouses has that one.
I would give them a call if you are having that much trouble finding them.
Oh and the O2 sensor for Bank 2 Sensor 2 is 23099.

Codak

The code is for “main catalyst efficiency below threshold bank 2”. It probably is the pre cat but i would like to see if it would be one of the o2 sensors first before dropping all the money. Jeep runs perfectly fine, just annoying to see the check engine light on all the time. Everything is original so I’m sure it’s time to do all the o2 sensors and cat. I would like to narrow it down 1 by 1 first. I’ll look into napa online, i know rockauto, amazon, everywhere is out of stock for NTK

Ralph77

Well unfortunately the upstream for Bank 2 is out of stock at my store according to the website.
But I don't know if that means they are out of stock at all Napa's.
But since it is measuring the threshold I have assume that is the job of the downstream.
Which looks to be available.

Codak

i used the part number and ordered 1 off amazon the last one they had in stock. Thank you!

Ralph77

Well don't thank me yet. LOL.
Pretty sure I know what I am talking about but......
And whether that is going to fix this is debatable IMO so...
But hopefully all goes well.

Codak

We will see, if not i will back here to ask more questions haha. Thanks again!

bluejeep2001

Main catalyst efficiency can only be after the cat in the exh manifold...therefore bank 2 sensor 2