Just run one. Putting two in the same circuit may confuse the PCM. Put a plug in the port you don't use.

GM only monitored one side with an O2 for years. Worked pretty good for them.

 

+1, exactly what I would do, run only one and plug the other side.

 

Sounds good to me and I read on another thread that someone can bring in a pipe and have it fitted for an O2 port. Did I under stand this correctly? If so ill run an exaust pipe to the muffler put the 2nd O2 in the pipe behind the cat than put muffler and tail pipe and thats that

 

Wiring two in parallel would screw the pooch...

I gotta wonder if there might be misfire detections galore running fully isolated duals like that.

 

I am not sure what criteria it uses to determine a misfire.... not like it has a knock sensor or anything......

 

On this I'm uncertain, but it makes sense that it would be watching for pulses from the oxygen sensor(s). I can't think of anywhere else it might get a relevant indication, anyway. So if that's how the PCM does that magic trick it's going to go bananas setting misfire codes for the bank it can no longer see.

I absolutely hate this big chunk o' ignorance I'm experiencing. We needs us a PCM guru.

 

Good theory. Guess we will find out huh?

I have heard rumors of folks getting codes only having the O2 reading one bank, but, I don't know WHAT codes they were getting.....