P0158, O2 sensor High Voltage. Wont go away.

[Rebelord]

I am throwing the code a lot. I have replaced the Bank 2 Sensor 2 twice now. NTK brand (NGK). When I pulled the original out, it was OEM Nissan Bosch. But I still keep throwing this code. Cant figure it out why.

I check real time voltages of my O2's and that was is still always high.

 

Any ideas?

 

William

[redneck_apache]

mine is also doing that, but its a 97... but idk if there is a fix for it because ive brought it into a professional mechanuc and all he did was reset the code and told me im fine. but i keep gettin the code

[Towncivilian]

There is a TSB about ECM reprogramming if rear oxygen sensor codes pop back up after replacement. See here.

[Rebelord]

So, I made a ground harness. 2 wire, 14 awg. Goes from the original ground points on the center of the intake to the passenger side head. Used all new SS bolts with a touch of anti-seize. Since the heads and intake are aluminum. I'll see how this works out.