Help Diagnose P0420 Code
Thread Starter
|
Beginning Member
Joined: Jul 2009
Posts: 19
From: McHenry, IL
Help Diagnose P0420 Code
2000 GMC Jimmy 4x4 - 150k miles
Just recently (last 60 days) I had an exhaust leak fixed... The Cat wasn't welded to the exhaust on the top so my mechanic properly welded it. Otherwise he said the cat was in great shape. About 7 days ago my SES light came on and I'm throwing a P0420 code. Any thoughts on diagnosing to ensure I fix the right thing?
Just recently (last 60 days) I had an exhaust leak fixed... The Cat wasn't welded to the exhaust on the top so my mechanic properly welded it. Otherwise he said the cat was in great shape. About 7 days ago my SES light came on and I'm throwing a P0420 code. Any thoughts on diagnosing to ensure I fix the right thing?
Thread
Thread Starter
Forum
Replies
Last Post
suckerpunch
2nd Generation S-series (1995-2005) Tech
7
Nov 18, 2015 08:51 PM
98blazr
2nd Generation S-series (1995-2005) Tech
44
Aug 21, 2009 01:17 AM
abens
2nd Generation S-series (1995-2005) Tech
1
May 27, 2008 06:00 PM
gio17vani
2nd Generation S-series (1995-2005) Tech
1
Oct 27, 2007 08:43 AM
