Rear O2 sensor question/ header installation
Thread Starter
Instructor
Joined: Sep 2012
Posts: 204
Likes: 2
From: Jacksonville NC
Rear O2 sensor question/ header installation
So Im installing my LG headers w/hi flo cats. I am Not going to use the rear o2 sensors, just connecting the front ones. I was able to disconnect the drivers side rear o2 sensor but cant get to/reach the passenger o2 connector to unhook it. does this sensor need to be physically disconnected or can the TUNER just disable the rears alltogether? Was thinking of maybe cutting it off to avoid it clanging around if possible?
Drifting
Joined: Dec 2012
Posts: 1,717
Likes: 28
From: O'Fallon IL
They can be turned off but they still require to be physically connected. I just installed headers on mine and even when they werw turned off in the tune I got codes because I didn't have extensions to connect the rear sensors.
Pro
Joined: Jul 2006
Posts: 552
Likes: 28
From: North Las Vegas Nevada
Rear O 2's
The tuners can do either: 1. O 2's connected and turned off. 2. O 2's disconnected and removed (requires more ECM programing and a smarter tuner). I have had both things done on various Corvettes.
Thread Starter
Instructor
Joined: Sep 2012
Posts: 204
Likes: 2
From: Jacksonville NC
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Jan 2001
Posts: 6,449
Likes: 371
From: Maryville TN
St. Jude Donor '06-13,'16-'17, '19
SUBVETTE
Joined: Jul 2006
Posts: 3,841
Likes: 93
From: San Diego CA
The connection can be reached after removing the exhaust manifold and cat on the passenger side before you install the passenger side header. I removed the rear O2 sensor before removing the cat, let it dangle, took out the manifold and cat and then disconnected it from the harness. Install the extension to the harness before you install the header.
Last edited by SUB VETTE; Apr 16, 2013 at 02:34 PM. Reason: addl info