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Board index » OBD Troubleshooting Help » OBD-II P0XXX Powertrain Codes All times are UTC - 7 hours [ DST ]

99 gmc suburban codes p0420 and p0430

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jramirezz	Post subject: 99 gmc suburban codes p0420 and p0430 Posted: Wed Jun 03, 2009 11:29 am
Joined: Tue Feb 24, 2009 8:19 pm Posts: 11	i got these to codes p0420 and p0430 does this mean i have 2 bad catalytic converters, or do i have something else wrong making these codes come up
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Sponsored Links	Post subject: 99 gmc suburban codes p0420 and p0430  Posted: Today
Joined: 29 Jun 2004 08:12 pm Posts: N/A
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Skydrol	Post subject: Re: 99 gmc suburban codes p0420 and p0430 Posted: Wed Jun 03, 2009 11:58 am
Joined: Wed Oct 08, 2008 11:32 am Posts: 165	Check the O Sensor, the very last one passed the Catalytic converter. Trace the wires and see if they are broken. _________________ I can fix pretty much anything but 2 things... Ugly and Stupid.
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