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Need help wiring up the left downstream O2 sensor on an 04 Unlimited...

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If you have to wire it up then you are probably installing a universal O2 sensor, if so return it- they are junk, the higher price of the direct fit is for a reason- they are that much better. ----- if you are joing ahead with what you have, **** conectors and heat-shrink tubing are recomended

Posted on Sep 03, 2008

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Found out I'm missing drivers side upstream o2 downstream was there some help to find the missing wire be awesome


So what kind of help are you looking for?
Year make and model would be helpful for any information.
Some vehicles only have one upstream and one downstream O2 sensor. Older vehicles only have upstream O2 sensors

Apr 19, 2015 | Cars & Trucks

1 Answer

O2 sensor wiring diagram 2005 ford expedition


http://www.bbbind.com/technical.html
Free wiring diagrams & TSB's-all makes and models. Your 4 O2 sensors are shown under System: engine, Subsystem: fuel controls.

Dec 23, 2013 | Ford Expedition Cars & Trucks

1 Answer

Where is downstream left o2 sensor located in 2005 kia sportage?


For oxygen sensor location diagram on kia sportage, click the link below:---

http://technoanswers.blogspot.com/2012/12/o2-sensor-located-in-2005-kia-sportage.html


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These will help.
Thanks.

Dec 06, 2012 | 2005 Kia Sportage

2 Answers

I have 4 oxygen sensors 1 is bad code po431 bank 2 is the upper or lower sensor


DESCRIPTION The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the engine or emission package, the vehicle may use a total of either 2 or 4 sensors.

On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Left and right are distinguished by sitting in the vehicle, not looking at the vehicle from the front

Aug 17, 2011 | Jeep Wrangler Cars & Trucks

1 Answer

Universal o2 censor has 2 white 1gray 1black existing wires areblack/tan dkgreen/orng blk/ltbl blk/pink


First what do you mean by a universal o2 sensor? You must make sure that you have the right o2 sensor, most newer vehicles have four o2 sensors 2 upstream and 2 downstream, upstream and downstream are meant to show where the sensors are in relation to the catalatic converter,some o2 sensors have 1 wire or up to 4 wires most with four wires are heated o2 sensors so you need to be sure you ve gotten the right o2 sensor for you vehicle as well as the right replacement for the proper location! My experience is that most after market o2 sensors have the same colored wires as the vehicle. Also most o2 sensors have electrical plugs? If you need help finding the right o2 sensor for your vehicle then please dont be affraid to ask!

Feb 12, 2010 | 1996 Jeep Grand Cherokee

1 Answer

2001 dodge durango 4.7liter 4x4 i replaced front o2 sensor,rear 02 sensor,ground wire to exhaust and the engine light keeping coding saying (o2 sensor heater curcuit malfunction bank 1 sensor 2). car runs...


bank 1 sensor 2 is the left downstream sensor (1/2) is located in the exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. Now the meaning of this is that your not getting any 12+/12- heating on sensor, which means voltage is supplied to heat sensor up. You have a O2 sensor heater relay, but not getting problem with 2/2 sensor tells me you need to check/inspect the wiring for 1/2 sensor, open wiring for 1/2 sensor and inspect

Feb 07, 2010 | 2001 Dodge Durango

2 Answers

Exact location of downstream O2 sensor.


Downstream O2 sensor is after (downstream) the catalitic converter on the exhaust pipe. Upstream O2 sensor is after (downstream) the engine exhaust manifold - before (upstream) the catalitic converter. Upstream O2 sensor controls air-to-fuel ratio to yield a small excess oxygen. Downstream O2 sensor assesses the catalitic converter performance.

Sep 22, 2009 | 2003 Pontiac Vibe

3 Answers

Where are they!


what kind of car? irregardless, you can pick up a detailed chiltons or haynes repair manual for your model at a local auto parts store.

Dec 29, 2008 | 1999 Mercury Cougar

1 Answer

O2 Sensor


Well, Bank 1 is the passenger side of the vehicle. Are you replacing upstream or downstream 02 sensor?

The upstream is in the exhaust manifold. The downstream is further down in the exhaust pipe. Upstream would be designated by the code HO2S1- B1 and the downstream would be indicated HO2S2-B1.

In either case, you basically unplug the wiring connector, use a 7/8 wrench (or an O2 sensor socket which has a groove cut in the side to allow the wiring to not be pinched) and loosen the sensor and install the new one (with anti-seize on the threads) and plug the connector in.

The upstream sensor is pretty easy- the downstream can be a little more difficult, but is not too bad.

Hope this is helpful!!

Nissan Scope Technician- 10+ years experience in Nissan dealership.

Oct 28, 2008 | 2002 Nissan Xterra

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