P0420 : 2000-2005 (other than GXP)

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P0420

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DASHAWN1234

Post subject: P0420

Posted: Sat Feb 09, 2013 1:37 pm

SLE Member

Joined: Fri Sep 30, 2011 11:43 am
Posts: 59
Year and Trim: 2005 PONTIAC BONNEVILLE SLE

When the engine is cold the car jerks and misfires, but once it warms up it drives fine anyone familiar with this symptom? I was thinking plugs and wires but It wouldnt only do it when the car is cold it would do it all the time. Since the code is P0420 I was thinking the cat but it wouldnt do it only when the engine is cold right?

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Portal » Board index » Mechanical and Maintenance (no chat or performance) » 2000-2005 (other than GXP)

All times are UTC - 5 hours [ DST ]

Topics		Author	Replies	Views	Last post
Related topics
	P0420 out of nowhere...	SSEiMan01	12	3053	Wed Nov 16, 2011 5:04 pm SSEiMan01
	P0420	EWC88	4	2785	Mon Oct 19, 2009 7:31 pm EWC88
	P0420	irish91983	4	2074	Mon Jul 09, 2012 11:17 pm irish91983
	P0420 code ??? Help	cvcman	4	1372	Mon Dec 18, 2017 9:00 pm cvcman
	CODE P0420	bonnieandclyde	3	2220	Sat Dec 10, 2011 5:25 pm bonnieandclyde

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