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Replace upstream oxygen sensor

Where is the upstream 02 sensor bank 1 and how do you change it?

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  • Kia Master
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Ok, up stream means close to the engine, down stream would be close to the catalytic converter. Bank one is with no 1 cylinder bank 2 is opposite side of engine. If you stand directly to the side of the engine and look across you will see that one of your cylinder heads protrudes more than the other, this will be bank one and the one staggered back is bank two.

Posted on Apr 28, 2013

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Posted on Jan 02, 2017

ewashmidas
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SOURCE: ned to replace oxygen sensor bank 1 upstream need to know where it is in the car

Up stream O2 sensors are always before the convertor. Check the exhaust manifold, if you have a V6 you may have two, make sure you know which one is bad.

Posted on Jan 25, 2009

emissionwiz
  • 75235 Answers

SOURCE: Replacing bank 1 sensor 2 and bank 2 sensor 1 oxygen sensors

BANK ONE IS THE REAR BANK OF CYLINDERS AND TWO THE FRONT BANK

Posted on Jun 24, 2009

  • 323 Answers

SOURCE: oxygen sensor confusion

1/1 is upstream sensor on the number 1 cylinder side, 1/2 is the downstream of the number 1 cylinder side, 2/1 is the upstream of the number 2 cylinder side, 2/2 is the downstream of the number 2 cylinder side. Hope this helps.

Posted on Aug 10, 2009

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SOURCE: 420 code catalyst system efficiency below

You could have an enefficient converter. Question is what caused it to go bad? I have attended seminars on code 420, Possible causes are lack of spark or clogged fuel injectors. there have been times where the spark plug wire lays on the engine and over time it wears a weak spot in the side of the wire, its not enough to throw a miss fire code but it keeps the full amount of spark from getting to the plug and not burning the all the fuel in the cyl. A leaky injector would also cause to much fuel to be deliverd into the cyl and not get burned.

Hope this helps.

Posted on Jan 20, 2010

  • 4369 Answers

SOURCE: Have a code on my Mercury Mountaineer 2003. 02

I would agree with that diagnosis. What was the code number?
P0xxx

Posted on Jul 10, 2010

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How much would it cost if i take my 2001 impala to a mechanic with codes p0135 and p0141?


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How to Change Upstream Oxygen Sensor on 2005 Impala
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2003 honda civic o2 how to replace And how do i fin out which once is it


Hi Jesus, Im AL the owner of Big As Auto Repair.

If you have a 4 cylinder engine then you will only have two 02 sensors 1/1 is upstream and 1/2 is downstream. Upstream is the one closet to the engine and downstream is the one farther away from the engine.

If you have a six OR eight cylinder engine you will have four 02 Sensors. 1/1 means Bank One Sensor One. 1/1 and Bank one means right bank and right bank means the side with the number 1 spark plug. SO, 1/1 means, "Right Bank" Upstream 02 sensor. 1/2 means, "Right Bank" Downstream 02 sensor.

2/1 means, "Left Bank" Upstream 02 sensor and 2/2 means, "Left Bank" Downstream 02 sensor. Hope this helps and please visit my auto-repair-website at: http://www.bigasautorepair.com/

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The upstream on bank 2, which is the opposite of bank 1. Bank 1 is the side with the number 1 cylinder. Downstream oxygen sensors (after the cat converter) are always sensor 2, as in Bank 2, sensor 2.

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Can an O2 oxygen sensor effect another sensor and give a false reading?


Check which side of your engine has cylinder #1. That side is bank 1. Bank 2 is the side opposite of bank 1. So bank 2 is not always passenger side. And since you seem to have extra O2 sensors, I would replace the other upstream and see what happens. Also the mass air sensor can give a trouble code issue to the upstream 02 sensors. Good luck. I've struggled thru this myself.

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OEM Part Number(s): 19178928, 25161131, 25312197 replacements: (1A AUTO)1AEOS00163 or Walker WKEOS00092-02

Bank 1 Sensor 3 ,Sensor number #3 is downstream (after) the Catalytic Converter. There are also 2 upstream sensors Left or Front
#1 and Right or Rear #2 upstream sensors.

Jul 03, 2014 | 2001 Cadillac DeVille

1 Answer

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code p0154 refers to heated oxygen sensor (HO2S) 1 bank 2 -- no activity detected===causes --wiring---HO2S---= ECM
it also refers to oxygen sensor (O2S) --no activity detected--===causes --- wiring---O2S sensor---ECM. May be you did not replace the sensors causing the fault.

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1 Answer

Where is bank 1 sensor 1 02 pyhisicaly located


The bank 1, sensor 1 O2 sensor is the upstream sensor on the rear bank of cyls.(assuming it's a V6). It may be difficult to access.

Feb 16, 2013 | 2002 Ford Taurus

1 Answer

P0133 error code what 02 sensor is it


This involves the front oxygen sensor on bank 1 sensor 1. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use. --------- There are two 02 sensors.That are before and after catalytic converter. Bank 1 sensor 1 (upstream/precatalytic converter) and bank 1 sensor 2 (downstream/post catalytic converter).
------------
But if possible replace both.The bank 1 as well as bank 2. Replacing both at a time is always advisable.--------- This should help.Thanks.Helpmech.

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1 Answer

How many oxygen sensor on a 02 chevy blazer


Hi, there are 4 sensors on your truck--two upstream and 2 downstream. The upstream sensors are mounted in the exhaust manifolds and the downstream sensors are mounted just behind the catalytic converters. The upstream and downstream sensors are different. Bank 1 is on the driver's side and bank 2 is on the passenger's side. Please let me know if you have more questions, and thanks for using FixYa.

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1 Answer

Where is the upstream oxygen sensor located


upstream oxygen sensor or bank 1 as its called is the closest to the exhaust manifold. now for the question back there are usually 4 o2 sensors on a car bank(front)1 sensor 1, bank 1 sensor 2 and (rear) bank 2 sensor 1, bank 2 sensor 2

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