I'm also interested in finding out as well. I'm located in NY and to pass the yearly inspection we must have at least 1 monitor ready to pass (MAF or o2). Since I'm on a SD tune my only option would be o2 monitors but after doing downpipes those sensors won't be ready anymore.

 

The weird thing is my catalytic monitor is read which means its already using the O2 sensors before and after the cats and that has ran and is completed without throwing a code.

 

Okay so just for reference of others

Maryland does not allow any OBD monitors to not be ready (based on google, I know for a fact they failed me with an O2 Sensor Monitor incomplete). To get all of my OBD II monitors to go ready I did the following:

1) Tried to use a map on my COBB with all codes turned on .... this did not work, all monitors were ready except O2 Monitor was incomplete. Drove for multiple days, no changes.

2) I uninstalled the COBB Access Port completely, went back to the factory map. I have ANSU 1050 injectors 3 in intakes etc, and I was hoping that the GT-R without any tune would be able to run and get me through emissions. I drove it around for about an hour watching the long and short term fuel trim which was -15 or so. All OBD II monitors went to ready except O2. Drove it to work today after sitting over night and 02 Sensor monitor went to ready!

So if you can uninstall your COBB AP and limp around and not go into boost this may work for others.

 

I passed emissions testing here in Oregon the very first time I tried. I'm FBO with 1050cc injectors, make sure you have an O2 extender, have your tuner enable the ( rear O2 enabled), go through a drive cycle before being tested and it should pass. One thing to remember to do is, disconnect the battery for an extended period of time after loading the O2 enabled map so the ECU does a full reset.

 

It took me over 1 week of driving to get my secondary O2 sensors ready.

 

How were you verifying them?

 

It took me over 1 week of driving to get my secondary O2 sensors ready.

Are you on cobb or ecutek?
I'm having trouble with 3 systems going ready o2, cat and evap.
I'm on ecutek ended up disconnecting 12 injector harness and E85 sensor. Have done about 4 drive cycles from cold to warm drove 140 miles and they will not go ready.
How many drive cycles should the monitors take to be ready??

 

Is there any way to tell if o2 is disabled in ecutek? I'm also having trouble getting the o2 monitor to complete. It's the only one that's "not ready". I'm assuming if it's disabled in the tune, it will never be ready.