Check Engine Light P0420 on a 98 Accord 4 cyl.

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Apr 28, 2004 | 03:56 PM

Vt3cTun3r

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Joined: Apr 2004

Posts: 10

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From: Chesapeake, VA

Check Engine Light P0420 on a 98 Accord 4 cyl.

Hey everyone! I just got my first Check Engine Light today at 119,347 Miles. Autozone gave me the code but not much else. I searched the net for the Code and found the code is for a Catalyst system efficiency below threshold. Does this mean I need a new O2 Sensor?

Thanks!

Apr 28, 2004 | 04:50 PM

trustme

Joined: Feb 2004

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From: Beverly, ma, usa

Re: Check Engine Light P0420 on a 98 Accord 4 cyl. (Vt3cTun3r)

p0420 is catalyst deterioration

if it came to my shop i would replace the cat and the o2 sensor

Apr 28, 2004 | 04:56 PM

Chiovnidca

Honda-Tech Member

Joined: Apr 2002

Posts: 7,574

Likes: 6

From: Cincinnati,, Oh

Re: Check Engine Light P0420 on a 98 Accord 4 cyl. (trustme)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by trustme »</TD></TR><TR><TD CLASS="quote">p0420 is catalyst deterioration

if it came to my shop i would replace the cat and the o2 sensor</TD></TR></TABLE>
I would only replace the o2 sensor if I couldn't get it out of the old cat.

Apr 28, 2004 | 05:01 PM

superchin

Joined: Apr 2004

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From: elgin, il, usa

Apr 28, 2004 | 06:30 PM

under advisement

Joined: Oct 2003

Posts: 151

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From: Probably my, desk

Re: Check Engine Light P0420 on a 98 Accord 4 cyl. (Chiovnidca)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca »</TD></TR><TR><TD CLASS="quote">
I would only replace the o2 sensor if I couldn't get it out of the old cat.</TD></TR></TABLE>
Same thing at my shop.

Apr 28, 2004 | 07:18 PM

Vt3cTun3r

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Joined: Apr 2004

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From: Chesapeake, VA

Re: Check Engine Light P0420 on a 98 Accord 4 cyl. (under advisement)

Thanks for the tips guys... What would be the cons of not replacing the cat other than the car not running as clean as it should?

Apr 29, 2004 | 03:01 AM

Chiovnidca

Honda-Tech Member

Joined: Apr 2002

Posts: 7,574

Likes: 6

From: Cincinnati,, Oh

Re: Check Engine Light P0420 on a 98 Accord 4 cyl. (Vt3cTun3r)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vt3cTun3r »</TD></TR><TR><TD CLASS="quote">Thanks for the tips guys... What would be the cons of not replacing the cat other than the car not running as clean as it should?</TD></TR></TABLE>
The CEL wil stay on. That's about it.