Trouble code P0420?

[punchit]

I cant find out what it is? can someone inform me please? thanks!

[Special Ed's R/T - Yaaaay]

Bad cat, bank one. Do you have gutted cats, or a high flow one ? Where are all of your O2 sensors mounted ?

[punchit]

Hey man, you are fast thanks, I actually found the answer on dakota-durango.com I just bought the truck so i dont know if its gutted or high flow. When i do replace it, should i go wiht a stock one or a high flow?Also should i replace the o2 sensors while swapping the cat out?

[1hotkadota]

I would go with a high flow. How many cats do you have?
As far as the O2's go, how old are they and are there any codes being thrown? If not I wouldn't worry about them.

[Special Ed's R/T - Yaaaay]

Hey man, you are fast thanks, I actually found the answer on dakota-durango.com I just bought the truck so i dont know if its gutted or high flow. When i do replace it, should i go wiht a stock one or a high flow?Also should i replace the o2 sensors while swapping the cat out?

What year truck is it and do you have to go through a sniffer test @ inspection. Do they do a visual, what are the state requirements ?

[mtlcafan79]

Ironic that Don is the first to reply to a P0420 question. Where's Grady?

[Special Ed's R/T - Yaaaay]

Ironic....hardly
Typical......certainly :woot: