Thread: P0420 pops up after Header kit install
View Single Post
  #5  
Old Thu, September 30th, 2010, 05:52 PM
jmt0645 jmt0645 is offline
semper fi
  
Join Date: Dec 2009
Location: mobile ,Al
Posts: 45
jmt0645 is on a distinguished road
Default
are they original or aftermarket cats? some aftermarket cat aren't as efficient as OE. (fyi: i have no cats at all and periodically have the same code even with my rear HO2S turned off by bill)
Reply With Quote