Brand new sensors that check out with voltage polarity and continuity. Replaced wiring from o2 to ecu and even swapped ecus and still the same issue. Anything else that i could possibly be missing or am i better off getting an open loop tune and just ignoring the o2 sensors. Would prefer to run them.

 

What vehicle?

Hell any information would help.

 

In a 2006 Nissan D22 Navara (frontier). Using a standalone harness purchased from a customs shop in Australia. Ls1 and 4l60e run entirely seperate apart from the alternator, starter and aircon which run on the factory ecu and barrel.

 

Have the rear 02 sensors been deleted in the harness?

I've seen several people mistaking plug the 02 sensors into the rear sensor connector by mistake. On F bodies it's really easy to do because where long tube's place the 02 sensors, is right next to the rear 02 sensor connectors.

I actually swapped the front/rear 02 sensor wires at the PCM so i didn't have to use 02 extensions

 

loom is bare minimum required to operate so no rear o2s. Tried probing ecu into rear o2s and read the same

 

Are you using the correct 02's for the PCM? Some ground differently than others.