Engine error lite code PO430 catalyst effency, Bank 2 - Ford Forums

01-16-2006, 12:01

1998 SOHC 4.0 Explorer. I would like some help determining
whether PO430 is up flow or down flow sensor. I think it must be the
up flow as I replaced the down flow sensor about 6 months ago.
Your help would be much appreciated.

Thanks in advance

Everett

01-21-2006, 16:01

the cat failed, if u replaced the downstream o2 u shot the
messanger,,,need a cat

01-22-2006, 12:01

I think you are correct, I hate to bite the bullet and purchase one
but the history of this is pointing that way. Thanks for the reply.

Sincerely

Everett Cotton

On Sat, 21 Jan 2006 17:56:04 -0500, bh--@webtv.net wrote:

>the cat failed, if u replaced the downstream o2 u shot the
>messanger,,,need a cat