o2 wiring on sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Options13 · 04-23-2010, 01:59 PM

ok so i noticed im not exactly getting the best gas mileage, and my car idles at about 13-14 on the wideband, i unplugged the O2 to see if it would effect anything, plugged it in, still continued to idle in the 13's

i have searched, i can't find a straight forward answer

i think i may have a blacktop wiring harness which is for the FAT o2 sensor, and i have a skinny o2, i heard the wiring is pinned out differently..

on the the sensor side there is a white, black and red wire.

-white is going to the black wire on the harness
-red is going to brown wire on harness
-black is going to what i believe is the white signal wire on the harness

everything check out?

i tested to see if any of the wires were getting power, and the red wire on the o2 is hot

OutlawLui · 03-05-2013, 09:19 AM

Hey bro sorry to bump this up, but did you ever figure this out?

This is exactly my problem

i also think i have a blacktop harness..but i have a redtop engine 62

-I installed a skinny o2 like im suppose to but the harness might be wired different

Harness ............... 02 sensor
brown wire-----------Red wire
white wire----------black wire
black wire----------white wire.

i Think since it might be a blacktop harness; the black and white wires are reversed...so i might have to
re-pin the o2 to match. that's if its wired wrong..

04-23-2010, 01:59 PM	#1
Options13 Nissanaholic! Join Date: May 2007 Location: OR Posts: 1,825 Trader Rating: (43) Feedback Score: 43 reviews	o2 wiring on sr20det ok so i noticed im not exactly getting the best gas mileage, and my car idles at about 13-14 on the wideband, i unplugged the O2 to see if it would effect anything, plugged it in, still continued to idle in the 13's i have searched, i can't find a straight forward answer i think i may have a blacktop wiring harness which is for the FAT o2 sensor, and i have a skinny o2, i heard the wiring is pinned out differently.. on the the sensor side there is a white, black and red wire. -white is going to the black wire on the harness -red is going to brown wire on harness -black is going to what i believe is the white signal wire on the harness everything check out? i tested to see if any of the wires were getting power, and the red wire on the o2 is hot Last edited by Options13; 04-23-2010 at 06:49 PM..

03-05-2013, 09:19 AM	#2
OutlawLui Zilvia FREAK! Join Date: Apr 2011 Location: Anaheim CA Age: 38 Posts: 1,491 Trader Rating: (19) Feedback Score: 19 reviews	Hey bro sorry to bump this up, but did you ever figure this out? This is exactly my problem i also think i have a blacktop harness..but i have a redtop engine 62 -I installed a skinny o2 like im suppose to but the harness might be wired different Harness ............... 02 sensor brown wire-----------Red wire white wire----------black wire black wire----------white wire. i Think since it might be a blacktop harness; the black and white wires are reversed...so i might have to re-pin the o2 to match. that's if its wired wrong.. __________________ .