Catalytic converters parts for a 2000 TJ 4.0L

[ikeldsen]

I’m trying to find the catalytic converters for my 2000 4.0L Jeep. I bought my Jeep many years ago and it didn’t have the cats in it so looking to finally put them back on. I’d really like to get rid of the permanent check engine light.

My Jeep throws codes for bank two sensor 2 not reading which makes sense. It means I have 4 o2 sensors. But when looking for catalytic converters with the downstream o2 ports I can’t find any for a 2000 TJ. Most are for 2004+. Will a 2004 cat system work on my 2000? Or can someone point me to one that will fit my Jeep that doesn’t cost $800?

I see a lot like this: https://www.4wd.com/p/flowmaster-di...MIjPa4tdqK7gIVxZyGCh353gzREAQYAyABEgJOe_D_BwE

I would love to find a reasonably priced part like that one.

 

[ikeldsen]

Another potential problem I have. I saw the 02 thread that lists out the part numbers for the o2 sensors. It was a very good and helpful thread.

My Jeep was originally a 4 cylinder and the previous owner converted it to a 6 cylinder. I was told the motor was from a 2001 Jeep. I noticed in that thread that there are different o2 sensors for a 2000 vs 2001. How am I supposed to figure out which I need? I’m not even sure if the type of o2 sensor is dependent on the year of the motor or the year of the computer.

 

[CharlesHS]

The O2 sensors have the same number and color of wires; I am sure the operating voltages are the same.
The major difference that I see between the '00 and '01 O2 sensors; the harness connectors are different.