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12-19-2012, 03:11 PM
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#1
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12 Second Club
Join Date: Aug 2004
Location: Oradell
Posts: 8,369
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P0420
97 lt1 m6
i am stuck here, i replaced the o2 sensor and the problem didnt go away, nothing rattling in the cat, no funny smells or anything that would indicate a bad cat, short of getting it tuned and the rear o2's tuned out, whats left to check?
and just to confirm p0420 is for the driver side correct?
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12-19-2012, 05:09 PM
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#2
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Join Date: Sep 2008
Location: Hackettstown, NJ
Posts: 1,643
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Look here: P0420
Fairly sure that bank 1 is the driver's side.
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1998 Z-28 - SLP lid - Ported TB - LS6 Intake - Dynatech SS headers/Catted Y - Magnaflow Exh - 3.42 - Yank SS3600 - UMI weld-in subframe connectors, Adj LCA, Adj PHB, Q1A TA - Bolt-in Relocation Brackets - Strano springs - Koni shocks - 17" C6Z06 wheels - 326HP/335ft-lbs - 12.35 @ 110.41
Quote:
Originally Posted by Blackbirdws6
I can appreciate a dream but this person needed some real friends.
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Last edited by The_Bishop; 12-19-2012 at 05:10 PM.
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12-19-2012, 06:21 PM
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#3
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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The code is the indication of the cat being bad.. If the Rear O2 sensor was not functioning, the PCM could not have set the P0420..
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12-19-2012, 09:02 PM
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#4
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Yup, you aren't experiencing total failure yet but the cat isn't doing its job. Driver cat is correct.
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12-19-2012, 10:48 PM
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#5
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Join Date: Apr 2009
Location: Andover, NJ
Posts: 777
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This code is the bane of my existence.... Not on an F body though, I've had it on my Subaru. Replaced the whole exhaust system 3 going on 4 years ago. The muffler rotted already, and that damn code is on. How the hell can a cat go bad in 3 years I don't know. But yeah, I've read in my case its the cat or the O2 sensors, some replaced one or the other and it went away. Some replaced it all and still have the light. Thing that bugs me is, it does go away for a short time (once it did so to get it through emissions) then it comes back. Hope you have better luck with your light than I did with mine. I'm due for emissions this year and the daily has a whole rap sheet of other problems so I'm trading in before I have to get it through.
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12-20-2012, 12:15 AM
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#6
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12 Second Club
Join Date: Aug 2004
Location: Oradell
Posts: 8,369
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oooooo fine i guess ill replace the cat
magnaflow factory replacements any good? best price i saw so far
http://www.summitracing.com/parts/mp...model/firebird
__________________
88 Camaro
95 Impala SS
97 Trans Am WS6
98 Blazer ZR2
00 Corvette
04 CTS-V
04 Grand Cherokee
07 Sublime Charger Daytona
09 Grand Cherokee Limited HEMI
12 Tahoe LT
17 Malibu LT
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12-20-2012, 07:15 AM
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#7
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Quote:
Originally Posted by L695speed
This code is the bane of my existence.... Not on an F body though, I've had it on my Subaru. Replaced the whole exhaust system 3 going on 4 years ago. The muffler rotted already, and that damn code is on. How the hell can a cat go bad in 3 years I don't know. But yeah, I've read in my case its the cat or the O2 sensors, some replaced one or the other and it went away. Some replaced it all and still have the light. Thing that bugs me is, it does go away for a short time (once it did so to get it through emissions) then it comes back. Hope you have better luck with your light than I did with mine. I'm due for emissions this year and the daily has a whole rap sheet of other problems so I'm trading in before I have to get it through.
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That will happen with aftermarket cats.
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