Question about 2006 Hyundai Sonata

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Oxygen sensor bank 2 sensor 1...no reading, needs replacement. question: can I do this without special tools can sensor be purchased besides dealer location and where on exhaust is it located.

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Hi
Its a very easy job and you should be able to do it with one spanner, very easy to find, they are mostly on the exhaust down pipe nowadays, look under the bonnet you will see a wire going into the exhaust with a bolt end screwed into it, simply unhook the wired end from the clip and unscrew the sensor.

The down pipe is the part of exhaust that leads from the engine then down and under the car, sometimes they are on the centre part of the exhaust, But im pretty sure not on this model.

Prices for these go from about £30 to £130ish you dont need a dealer part as they are quite a simple device and it makes no real difference, most parts suppliers will be able to get you this, I recommende Euro car part, you should have a supplier in your area they are a big firm, also have a look on ebay so you have an idea of price.

here is one, please check this is the correct one for your car though, ask the seller. click the text to view http://cgi.ebay.co.uk/BNIB-Hyundai-Exhaust-Manifold-Oxygen-Sensor-3921037140_W0QQitemZ270512235291QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item3efbc9231b

Hope this helps, Also make sure the exhaust is cold, and leave the ignition off.

Regards
Dan

Posted on Feb 04, 2010

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I need to replace bank 1 senor 1 on a 2005 Avalon and bank 1 senor 2.


bank 1 is the front bank closest to the grill
sensor 1 is the heated oxygen sensor and is located in the manifold or before the cat converter
sensor 2 is the oxygen sensor and is located after the cat converter
get a specialist oxygen sensor tool so that the small wires are not damaged during repalcement

Sep 26, 2016 | 2005 Toyota Avalon

Tip

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

ENGINE LIGHT ON CODES P0141 & P0144


code p 0141 refers to heated oxygen sensor (HO2S) 2 bank 1--heater control--circuit malfunction===causes --wiring---HO2S--- ECM
code p 0144 refers to heated oxygen sensor(HO2S) 3 bank 1--high voltage ===causes wiring short to positive ---HO2S---ECM
also refers to oxygen sensor(O2S) 3 bank 1--high voltage ===causes wiring short to positive---O2S-- ECM
HO2S sensors are the units in the exhaust manifolds or before the cat converters
O2 sensors are after the cat converter
two completely different operations
use the special tool for sensors as the wires are easily damaged from the wrong tool use
as for misfiring you will get a P0300 (0300,0301,0302,0303 etc) depending on which cylinders are misfiring
when checking for misfiring the injectors , (blocked or not firing) are as important as plugs and wires
If the misfiring continues after sensor replacement , replace the ECM with a known good one as it is common to all fault codes and misfiring

Jun 06, 2016 | 2005 Hummer H2 SUV

1 Answer

I just replaced both o2 sensors pre-cat converter and can't clear the service engine light on an 01 yukon. I tried pulling the fuse, disconnect battery with no luck. In research I noticed that the dealer...


I think you need Bosch for that vehicle. here is a rundown how it helps


Every automobile manufactured after the 1980s is equipped with an oxygen sensor. This component measures the ratio of air and gasoline in the engine and feeds the data to the vehicle's computer. With an oxygen sensor, your engine runs more efficiently and produces as few emissions as possible. If your car's running with a busted oxygen sensor, you better get a new one before your engine's efficiency takes a nosedive and your gas bills skyrocket. We know that looking for the right replacement oxygen sensor can be very tricky, that's why we've come up with a guide for you to keep in mind when shopping for a new oxygen sensor.
Which oxygen sensor should you buy?
There are a lot of questions about which oxygen sensor to replace. In fact, failures are common among cars especially when the wrong sensor is installed. With today's automobiles equipped with at least two, or even three or four oxygen sensors, it can be very confusing as to which one is not working correctly. There are probably a lot of sensor codes to choose from and here's a tip to help you sense the right oxygen sensor.
Oxygen sensors are always numbered this way:
Bank 1 Sensor 1
Bank 2 Sensor 1
Bank 1 Sensor 2
Bank 2 Sensor 2
Other manufacturers code their oxygen sensors this way, which is why it can sometimes be very confusing. However, they all mean the same:
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
Now here's a detailed list to know which is which:
  • Bank 1 is located at the side of the engine where cylinder #1 is found as well.
  • Bank 2 is on the opposite side of Bank 1.
  • On a 4-cylinder engine, there is only one bank that's called Bank 1.
  • Sensor 1 is the upstream sensor located before the catalytic converter.
  • Sensor 2 is the downstream sensor located after the catalytic converter.
  • Sensor 3 is the only downstream sensor in situations where there are two sensors before the catalytic converter and only one after it. On other cars, this is read as Bank 1 Sensor 3.
With these detailed tips on how to sense the right oxygen sensor, you'd be sure to buy the right replacement part at your store. Be sure to purchase one from a trusted brand to avoid any complications you might experience with ones that are bought from local junkyards BEST OF LUCK

Aug 26, 2013 | Dodge Grand Caravan Cars & Trucks

1 Answer

FOR A 1997 HONDA ACCORD LX WHAT IS THE DIFFERENCE BETWEEN OXYGEN SENSOR BLOCK1 AND BLOCK2, AND HOW CAN I INSTALL THE OXYGEN SENSOR? WHAT WOULD I NEED TO INSTALL IT WITH(ANY SPECIAL TOOL?) AND WHY IS T


The bank 1 is the one before the catalytic converter (that would be in line in the exhaust pipe just after the engine), No 2 is after, in the middle of the car, and if you are lucky a 7/8 wrench would do.

Feb 02, 2013 | Honda Accord Cars & Trucks

1 Answer

Rich fuel mixture banks 1&2


Fuel sensors work in the hottest part of the exhaust and are difficult to remove after a period of time. Many mechanics apply a small amount of never seize to the threads to assist in replacement and future removal. However this affects the grounding of the sensor and can cause fault readings. Ask the mechanic if he did that and follow you idea that the sensors may aftermarket and not suitable for yoyr car

Jan 23, 2013 | 2002 Toyota MR2 Spyder

1 Answer

How to locate the rear oxygen sensor in a 1995 Toyota camry


will try to help, bank one 02 sensor is closest to exhaust manifold, bank 2 is further away, sounds like you need location to bank 2 look in front of catalytac converter. it will have a green wire attached to it leading directly inti the exhaust system.you will need a special socket for removal though,which you can purchase at autozone or advance auto, or a local auto parts dealer. as always, thank you for choosing fixya.com for all your automotive questions. look forward to assisting you in the future.

Nov 24, 2010 | 1995 Toyota Camry

1 Answer

How to replace an oxygen sensor on a 1994 buick lesabre


you have 2 bank one or 2? either one you need a special tool to remove sensor location on exhaust under car under drivers seat unplug sensor apply tool turn counter clock wise until it comes out,make sure you plug new sensor in upon installation

Aug 14, 2010 | 1994 Buick LeSabre

1 Answer

'08 Highlander...VSC & check engine light came on....


Hello/ The P-0158 code realtes to the Oxygen Sensor.

Specifically, it is as follows: Oxygen Sensor Circuit has High Voltage; Bank 2 Sensor 2.

If it under warranty, take it to a dealer to get it replaced free of charge. If not, go tho a dealer and tell them that you want Oxygen Senso Bank 2, Sensor 2, and have them tel you where it is. Please do not buy an "aftermarket" sensor, they have been known to read incorrectly, and you problem will not be solved.

I hope that this helps you, and that you will award me a "FixYa" rating for my assistance. 4 blue diamonds. Thanks.

Feb 05, 2009 | 2003 Toyota Highlander

1 Answer

2000 mitsubishi galant


If you have changed out the parts and still get the codes you probably need to have the ECM reset. The dealer can do that for you or a repair shop that has the scan tool.

Jun 20, 2008 | 2000 Mitsubishi Galant

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