Engine error lite code PO430 catalyst effency, Bank 2

Jan 16, 2006 2 Replies
C
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


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B

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

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C

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 Cott>the cat failed, if u replaced the downstream o2 u shot the

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