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Downstream Bank 1 O2 Sensor Harness Wiring Colors HELP

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Old Jan 19, 2012 | 03:39 PM
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williamwells59
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From: Kentucky
Default Downstream Bank 1 O2 Sensor Harness Wiring Colors HELP

2003 Nissan 350Z Touring
My downstream bank 1 (sensor 2) O2 Sensor connector is missing and the wires are not hooked up. Throwing a p0037. I would like to hook it back up and see if the O2 is ok. I believe it is the stock sensor currently in there. 80k miles.

From the O2 sensor I have 4 wires:
Black = Signal
Grey = Ground
White = Heater
White = Heater

From the harness I have what colors I believe are:
Pink/Black Stripe
Red/Black Stripe
Yellow/Black Stripe
Orange

I would like to know which of these for is the SIGNAL and GROUND and the other 2 should be the HEATER.

Thanks guys this is driving me crazy.
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Old Jan 20, 2012 | 01:22 PM
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williamwells59
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Could someone look under the 350z for me? If it was possible to crawl under one of these and find out I would on the next one I see parked. haha.
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Old Jun 23, 2013 | 08:30 PM
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bealljk
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Searched…this is what I came up with...

O2 sensor help…

I cut my o2 sensor so that I could splice in a heat sheathing to prevent melting from when the headers/turbine heat up. For some reason I thought they were 4 different colors so I didnt bother marking them - but (as above) there is a black, a grey and two whites…

my question is does it matter which white is connected to the other which white? can white #1 be connected to white #2 and/or vice-versa? does the 'heating' function like a light bulb where there is no polarity or are the whites specific to the grey, black or white wires?

Thanks in advance
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