Thread: P0420 code
View Single Post
Old 01-26-2013, 12:46 PM   #2
greenformula92
 
greenformula92's Avatar
 
Join Date: May 2010
Location: Brick, NJ
Posts: 1,868
iTrader: (1)
Sounds like the O2 is bad. I believe you will want to change the one in the header. The coating on the headers may have ruined them.
__________________
Formerly known as blk95formula
86t/a_ram_air on TGO

2018 Silverado 1500
greenformula92 is offline   Reply With Quote