Thread: 2002 Pontiac Montana Error code P0420
View Single Post
Old 06-26-2012, 11:09 AM   #14
Tech II
AF Fanatic
 
Join Date: Jul 2011
Location: Worcester, Massachusetts
Posts: 5,017
Thanks: 70
Thanked 618 Times in 610 Posts
Re: 2002 Pontiac Montana Error code P0420
Not sure what you mean? Are you thinking the exhaust is blocked after the cat, after replacing the cat?
Tech II is offline   Reply With Quote