2nd o2 sensor(cat)

[mitsuclipsegsx]

I ordered buschur 3" exhaust NO cat 3" DP and o2 dump now will i use that end o2 sensor by cat or just remove it, what do u guys do?

 

[L2RTSiAWD]

The o2 sensor screws in after the cat so if the exhaust has a place for it you can still screw it in.

 

[David15151]

I am actually about to install the same exact set up and was wondering the same thing. Can I just remove that second 02 sensor? How much of an effect does it have? Does using a S-AFC II have any effect on if i need it?

 

[David15151]

The only thing I have really heard is that the Check Engine light will stay on.. and frankly I think every car I have owned has that light on . Will the ECU get confused and make the car run bad if it is not getting a reading from that Second 02 sensor by the Cat.. that is the question I am wondering. I know all of you guys cant have that o2 sensor in there running test pipes.. even if it is installed won't having no cat at all confuse it?

 

[dave99gst]

most people remove it from the exhaust stream but leave it plug'd in.

 

[David15151]

most people remove it from the exhaust stream but leave it plug'd in.

so.. you attatch it to the underbody? or something?

 

[c5chris]

You can just have it attached under the car using duct tape - only if your catback does not have a bung for it. It is only used for emissions and measures the efficiency of your Cat.

 

[David15151]

nice.. so basically.. its not a big deal. good to know.

 

[tom1995tsi]

RNR put a flange on my 3" SS for me i was happy when i saw that