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Oxygen sensor Where is the downstream o2 sensor located

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  • Hyundai Master
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Normally on the outlet end of the cat converter. The heated o2 sensor is prior to the converter.

Posted on Feb 14, 2014

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Posted on Jan 02, 2017

Brian032472
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SOURCE: will a bad oxygen sensor cause my car not to start?

An o2 sensor won't cause a no start issue. I'm praying your anti-freeze mixture was correct that day though.

Posted on Feb 01, 2009

  • 105 Answers

SOURCE: 2001 elantra replaced cat o2 sensor upstream and

In reading what you've already done, I would suggest a Compression Test along with a vacuum gauge hooked up to the intake manifold. It may be that you're burning oil through your exhaust system in the catalytic converter. I've seen this with leaking or inoperative turbo-chargers. Pull all of your spark plugs, marking them as to what cylinder they went in with a Sharpie and if worn, replace them. Check the distributor cap & rotor button for wear or cross-firing. A Haynes Manual for your vehicle is available through most part stores which is truly effective for your DIYer. Bad plug wires can send unburned gases down through both O2 Sensors and the Catalyst. You may also want to check the plug wires and the coil(s). A fast way of checking plug wires is to grab all of them with your hand with the vehicle running and if you get "zapped"...you need spark plug wires. Remember, the codes you pull are just a general starting point as to where to start your diagnostics, not the exact problem itself. The computer doesn't monitor the mechanical aspect of your engine nor the fuel supply. The computer will take this as a given, so don't forget that when testing that it could be a compression problem or fuel problem, but as I first said...an oil leak fouling your exhaust system such as an inoperative EGR valve or oil leak on the exhaust side of the valve train.

I hope this Helps,

"00 Buck"

Posted on Jul 18, 2010

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1 Answer

Where are o2 sensors location


One would need the year, make, model, and engine size to tell you exactly where they are and how many.

O2 sensors are always in the exhaust stream, either in the exhaust manifold that is attached to the engine, or in the exhaust piping after the exhaust manifold. Some models have one for each bank of the engine, and some have only one sensor to monitor oxygen content. These engine sensors that the computer uses to "fix" or adjust the air/fuel ratio are called the upstream oxygen sensors. If the car is equipped (as most are today) with an oxygen sensor after the catalytic converter, this is called a downstream oxygen sensor. They are the same and do the same thing, but the downstream sensor is only used to monitor the efficiency of the converter. The upstream sensor(s) are what the computer reads to adjust or "trim" the fuel delivery.

So some older cars have only one o2 sensor. Not far from the engine in the exhaust stream. Some newer cars with dual exhaust (2 converters) may have four o2 sensors. 1 for each bank of the engine and 1 behind each catalytic converter. A 2005 Buick Century with a 3.1L engine, for instance, has only two o2 sensors: one (upstream) in the exhaust down pipe, and one (downstream) just behind the catalytic converter.

Aug 16, 2014 | Cars & Trucks

1 Answer

Downstream oxygen sensor H02 Bank 1 & Bank 2


Bank 1 o2 sensor is located in the exhaust manifold up by the motor bank 2 is located downstream futher in front of the cat.converter mounted in the exhaust pipe.

Aug 12, 2013 | 2002 Mercury Sable

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


--------
These will help.
Thanks.

Dec 06, 2012 | 2005 Kia Sportage

2 Answers

I have research around and found that the Bank 1 sensor 3 O2 sensor is post Cat. But when I got under there I dont see anything that could resemble a sensor. Where is it. Please help. Marc


try this
ALLDATA Editor's Note: Always verify #1 cylinder location prior to diagnosis and repair.

- Cylinder bank number one is the bank that contains number one cylinder.


See: Firing Order


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Cylinder #1 on left side.

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Cylinder #1 on right side.

- The first oxygen sensor in cylinder bank # 1 is numbered O2 Sensor 1/1.
- The second oxygen sensor in cylinder bank # 1 is numbered O2 Sensor 1/2.
- A third oxygen sensor in cylinder bank # 1 would be numbered O2 Sensor 1/3.
- The first oxygen sensor in cylinder bank # 2 is numbered O2 Sensor 2/1.
- The second oxygen sensor in cylinder bank # 2 is numbered O2 Sensor 1/1.



- If a V-6 or V-8 vehicle only uses one downstream Heated Oxygen Sensor (HO2S) it is numbered O2 Sensor 1/2, even if it uses two upstream HO2S.
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Jun 03, 2011 | 2001 Dodge Stratus

2 Answers

Bank 1 sensor 2 location on a 1996 chevy suburban


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Fig. Fig. 3: Oxygen sensor-4.3L engines


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Fig. Fig. 4: Oxygen sensor-5.0L and 5.7L engines





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Fig. Fig. 5: Oxygen sensor-7.4L engines




Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2

Some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2

Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.

Sensor 1 is always the upstream sensor (the one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.

Hope helps (remember to rate this).



Dec 12, 2010 | Chevrolet Suburban Cars & Trucks

1 Answer

Need to know where O2 sensor is located on a 2005 Dodge Grand Caravan.


There are two oxygen sensors: one is upstream of the catalytic converter and one downstream of the catalytic converter. The oxygen sensor, or O2 sensor is usually located near the catalytic converter.Oxygen sensor downstream of the catalytic converter in the exhaust system on the back of the engine. ------- Thanks.Helpmech

Nov 15, 2010 | 2005 Dodge Grand Caravan

1 Answer

Location of downstream oxygen sensors


The downstream o2 sensor is located behind the catalytic converter.

Feb 02, 2010 | 2002 Chrysler Sebring

1 Answer

Where is the oxygen sensor located?


WHICH ENGINE YOU GOT?... V6 OR 4 CYLINDER?
On the V6 there are four (4) oxygen sensors (O2 Snsr), and on the 4 cylinder there are two (2) O2 Snsrs. The Upstream O2 sensors are in the exhaust manifolds at the top, and the downstream O2 sensors are at the bottom of it or in the exhaust pipe.

Oct 06, 2009 | 2003 Hyundai Tiburon

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

2 Answers

How many oxygen sensors in a 2001 chrysler sebring 3.0


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Fig. Heated Oxygen (HO2S) location (sensor 1)-2.4L engine

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Fig. Heated Oxygen (HO2S) location (sensor 2)-2.4L engine

99e413c.jpg

Fig. Heated Oxygen (HO2S) location (bank 1, sensor 2) (bank 2, sensor 2)-2.7L engine

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Fig. Heated Oxygen (HO2S) location (bank 2, sensor 1)-2.7L engine

I hope help you with this (rated this help). Good luck.

Sep 09, 2009 | 2001 Chrysler Sebring

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