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Where is bank one oxygen sensor located - 1998 Buick LeSabre

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Bank one will be where cylinder # 1 is at. look at your coil pack and follow # 1 spark plug wire, that's bank 1.

Posted on Jul 14, 2010

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Location of bank 1 sensor 1 o2 sensor 0n a 6 cylinder jeep grand Cherokee laredo


bank one is left side top of engine standing looking at it , O2 sensor is located on exhaust manifold there is one on each manifold (right-left)

Sep 29, 2016 | Jeep Cars & Trucks

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Which Oxygen Sensor Is It?


There are many inquiries online about which oxygen sensor to change. Oxygen sensor failure codes are very common on a lot of vehicles. With all of today's vehicles having at least two oxygen sensors and many having three or four of them, it can be a little confusing as to which one is causing the problem.

Before we get into which sensor is which, we need to have a little discussion about oxygen sensor fault codes. There are several different types of oxygen sensor fault codes. Here are just some of the most common ones:

P0135 "Oxygen Sensor Heater Circuit Bank1 Sensor 1"
P0141 "Oxygen Sensor Heater Circuit Bank 1 Sensor 2"
P0147 "Oxygen Sensor Circuit Bank 1 Sensor 3"
P0152 "Oxygen Sensor Voltage High Bank 2 Sensor 1"
P0159 "Oxygen Sensor Slow Response Bank 2 Sensor 2"
P0171 "Oxygen Sensor Lean Sensor 1 Bank 1"
P0172 "Oxygen Sensor Lean Sensor 1 Bank 2"
P0174 "Oxygen Sensor Rich Sensor 1 Bank 1"
P0175 "Oxygen Sensor Rich Sensor 1 Bank 2"

There are many more possible oxygen sensor codes, but I only listed these to make my point. Many times the oxygen sensor code is NOT caused by the oxygen sensor itself. "Lean" or "Rich" oxygen sensor codes (i.e. P0171, P0174) are usually caused by something other than the oxygen sensor. Something is wrong, causing the engine to run lean (not enough fuel or too much air) or causing the engine to run rich (too much fuel or not enough air). In these cases, replacing the oxygen sensor will not fix a thing. (That is, unless you are trying to fix your bank account from having too high of a balance!) The new oxygen sensor will just set the same code as the original one. This is because the oxygen sensor is not CAUSING the problem, it is only REPORTING the problem.

High voltage codes (like P0152 above) can be caused by the oxygen sensor wires being shorted to another wire inside the wiring harness. Sometimes these codes are caused by bad grounds where some other component is trying to ground through the oxygen sensor circuit. Again, replacing the oxygen sensor will not fix this! In short, the problem needs to be diagnosed before running out and buying an oxygen sensor.

Just because a fault code has "Oxygen Sensor" or "O2 Sensor" or "O2S" in its description does not necessarily mean that an oxygen sensor needs to be replaced. Many do-it-yourselfers believe that all there is to fixing the car is to hook it to the "magic box", collect the fault codes and replace the parts the computer tells you to replace. There is nothing further from the truth.

Fault codes only point you toward which SYSTEM is failing. The system must be diagnosed to find the CAUSE of the failure. If this is not done properly, it will only result in wasting a bunch of your money. This is what you were trying to avoid by doing it yourself!

So, after reading all of the above, if you think you still want to replace an oxygen sensor, but don't know which one; here is how to figure it out:

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 #1 is located and, of course, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only one bank and it is always referred to as Bank 1. The exception to the 4 cylinder rule is on certain 4 cylinder engines (specifically, some Toyotas) there are two catalytic converters used. In this case, Bank 1 sensors will still be in the pipe for the catalyst that is connected to cylinder #1 and Bank 2 sensors will be in the other one.

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).
Sensor 3 refers to the ONLY "downstream" sensor where there are two sensors before the catalyst and only one after the catalyst. On very few vehicles the reference to this reads "Bank 1 Sensor 3".

If you do not know where cylinder #1 is, then you need to get a diagram of the firing order for your engine. Just post a question on FixYa.com and make sure you give the YEAR, MAKE, MODEL, and ENGINE SIZE of your vehicle and one or more of our experts will be happy to tell you how to find cylinder #1.

- DTTECH
ASE Certified Master Automobile Technician


Also check out this article by dttech: What Else Could Be Wrong?

on Apr 29, 2011 | Ford F-150 Cars & Trucks

1 Answer

How many o2 sensors on a 99 Cadillac catera


Four .
Heated Oxygen Sensor (HO2S Bank 1 Position 1)
Located in RH front pipe of the exhaust catalytic converter
--
Engine Controls Connector End Views in Engine Controls
Heated Oxygen Sensor (HO2S Bank 1 Position 2)
Located in RH rear pipe of the exhaust catalytic converter
--
Engine Controls Connector End Views in Engine Controls
Heated Oxygen Sensor (HO2S Bank 2 Position 1)
Located in LH front pipe of the exhaust catalytic converter
--
Engine Controls Connector End Views in Engine Controls
Heated Oxygen Sensor (HO2S Bank 2 Position 2)
Located in LH rear pipe of the exhaust catalytic converter

Sep 21, 2015 | Cadillac Cars & Trucks

1 Answer

PO 134 bank 1 location


Bank 1 is located towards the driver's side. Sensor 1 is located upstream just below the exhaust manifold.
EOBD II Error Code: P0134
Description:
Oxygen Sensor (O2S) 1, Bank 1/Heated Oxygen Sensor (HO2S) 1, Bank 1 - No Activity Detected
Possible Causes:
- Wiring.
- Signal wire between the Heated Oxygen sensor and ECM is disconnected.
- Heated Oxygen Sensor defective.
- ECM.

Jul 04, 2014 | 1999 Hyundai Sonata

4 Answers

Where is bank1 and bank 2 located on a lincoln LS?


Bank #1 passenger side

Bank #2 driver side

Replace the front (2) converter inlet O2 Sensors,
when they get to 100,000 miles

Aug 04, 2011 | 2002 Lincoln LS

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

Where is the bank 1 sensor 1 o2 sensor located in a 2006 hyundai sontata gls v6?


The bank has to do with which side of the engine. The 'Sensor 1' indicates that it is upstream of the catalytic converter.

Heated Oxygen Sensor Removal & Installation Heated Oxygen Sensor (Front) (2.4L) hyundai-04-24-5822.gif

Heated Oxygen Sensor (Rear) (2.4L) hyundai-04-24-5823.gif

Heated Oxygen Sensor (Bank 1/Sensor 1) (3.3L) kia-04-00-5213.gif

Heated Oxygen Sensor (Bank 1/Sensor 2) (3.3L) kia-04-00-5214.gif

Heated Oxygen Sensor (Bank 2/Sensor 1) (3.3L) kia-04-00-5215.gif

Heated Oxygen Sensor (Bank 2/Sensor 2) (3.3L) hyundai-04-33-5855.gif

prev.gif next.gif

Jan 13, 2011 | 2006 Hyundai Sonata

2 Answers

Bank 1 sensor 2 location on a 1996 chevy suburban


zjlimited_210.jpg

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


zjlimited_211.jpg


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





zjlimited_212.jpg



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

2 Answers

2005 gallant with O2 sensor engine light is one...how do I fix it?


have the engine light code scanned, and it'll tell you if it's bank 1 sensor 1, bank 1 sensor 2, bank 2 sensor 1, bank 2 sensor 4.

Bank 1 is on the same side as Cylinder 1
Bank 2 is on the opposite side of Cylinder 1

Sensor 1 is located before the catalytic converter.
Sensor 2 is located after the catalytic converter

Sep 11, 2009 | 2001 Mitsubishi Galant

2 Answers

How many oxygen sensors in a 2001 chrysler sebring 3.0


17c3292.jpg

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

db6f426.jpg

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

e2a250f.jpg

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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