Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - oxygen sensor graph review help. Cat dead?
View Single Post
Old 02-03-2012, 12:37 PM   #15
Focus Enthusiast
Grinder's Avatar
Join Date: May 2011
Fan#: 85627
Location: Minneapolis, MN
What I Drive: 2003 CD silver SVT

Posts: 497
FF Reputation: 10 Grinder Great Standing Member
Buy-Sell-Trade Rating: (0)
Perhaps but the cat monitor isn't really comparing the front to the rear so much as just focusing on the rear during closed loop. Obviously it isn't looking closely in OL drive modes like WOT or extended idle but I've never heard of a bad (or brand new) front 02 erroneously setting cat efficiency codes.

If the light doesn't come back on I wouldn't worry much.
When discussing matters of vex, be prepared to be treated as the vexer.
Grinder is offline  
    Reply With Quote