ok guys anyone tell me what the secondary o2 sensor is?

 

Emisions- it basicly tells the comp. if the cat is working and cleaning the exhaust up.

 

does it have an effect on fuel mixture?

 

Yes, not directly, but if you take it out you will have a CEL on all the time which will make your car run rich.

 

ok so mine is out, and i have nowhere to coonect it to so do i wire direct to ecu or what do i do?

 

go to a muffler shop or a mechanic that does welding and have them put in an O2 bung after the cat.

 

i have the sensor in the cat problem i have is that i dont have a plug on my harness for a second o2 sensor, the ex second sensor plug is located under the center concole goes in the dash. i dont have that so. what do i do! do i run teh sensor direct to the ecu or what my car runs like sh&t!

 

anybody have an answer for me?

 

why, what swap did you do> into what car?

 

speaking of this, what size wrench do i need for a d16y8 o2 sensor?