My car is going in for its turbo install on tuesday. Right now I have a cel. The cel was read by an obd2 scanner its catalist efficeny below threashhold. So I assume thats the secondary right?.

When my setup is complete im going to be running a chipped p-28 with hondata s200 w/ boost option. So im only going to need one o2 sensor. So would I use the primary or the secondary?.

Also if I wanted to go wideband would I still use a narrow band o2 sensor?.

Thanks if someone could help me out.

 

there is a faq at the top of the forum. it will help you with your goals.

 

I know my goals. I have all my parts. I know what they do. Im asking about o2 sensors.

I have a check engine light on as of now. Im getting my parts installed on tuesday. Right now im obd2. Im going from obd2 to obd1.

My check light is for catalist effiency below threash hold. Is that for the secondary o2 sensor or the primary.

Also When I switch from obd2 to obd1 do I use the secondary sensor or the primary sensor.


Thanks

 

i would have to say its for the 2nd one, being that is the one that mesures the air after the cat.

i hope you're ditching the cat

 

Yeah the cat is going to the junkyard. Im going to be using a 3inch downpipe with 3inch piping all the way back to a 3inch inlet muffler.

So if it is secondary I wouldnt have to worry about right. So I could just clip the wires on it and make it a dummy o2 sensor.