Nissan 370Z Forum - View Single Post - OBD readiness

Jhill · 12-26-2021, 08:13 PM

Like posters said before your tuner likely turned it off because of the cats. I’m a little confused by this though as the rear 02 ran and passed and those are the ones that would/should likely fail without cats. The rear o2’s with a good cat should have slow low amplitude switching voltage and hover around 1/2 a volt, without the cats it should be switching rapidly between about .1-.9 volts. You can make sure the fronts and enabled and then runs the extend j bend bungs for the rear o2’s if you don’t have to pass a visual. This will give you full functionality of the fronts and dilute the exhaust that the rear 02’s see.

12-26-2021, 08:13 PM	#8 (permalink)
Jhill Track Member Join Date: Mar 2016 Location: San jose Posts: 854 Drives: 2013 370z sport Rep Power: 3384	Like posters said before your tuner likely turned it off because of the cats. I’m a little confused by this though as the rear 02 ran and passed and those are the ones that would/should likely fail without cats. The rear o2’s with a good cat should have slow low amplitude switching voltage and hover around 1/2 a volt, without the cats it should be switching rapidly between about .1-.9 volts. You can make sure the fronts and enabled and then runs the extend j bend bungs for the rear o2’s if you don’t have to pass a visual. This will give you full functionality of the fronts and dilute the exhaust that the rear 02’s see. Last edited by Jhill; 12-27-2021 at 08:12 PM.