How Oxygen Sensor Works

Watch the animated video showing how an oxygen sensor in the exhaust system of a car works.

[@tanveernaeem1157]

A 100 page book couldn't have explained the functioning of O2 sensor as clearly as does this 4 minute video. Thanks for sharing.

[@cereal-killer4455]

The ONLY video on youtube that explains the actual principle and working behind the O2 sensor

[@georgetempest2469]

Superb video - many thanks! Made a non- car mechanic understand the way it works. I am an electrical engineer and this is a totally different world to me ;o)

[@ChinaMo]

OMG YES! Thank you for providing exactly what I need to understand what's going on under the hood!

[@DeeRuss]

I make these at Denso the process is very unique from start to finish

[@DeepakYadav-xo6by]

Sir...I m watching this for preparing interview in denso

[@georgeh1352]

Excellent, a picture is worth a thousand words. I can now understand why the Sensor votage is oscillating and not a steady DC.

[@jamesstuart8559]

Great video explanation on how and what an oxygen sensor actually does! I understood the purpose of the sensors but the science of how and what they actually do was a bit of a mystery to me, this video was both interesting and very informative. Nice job! Thank you for posting.

[@mbarizia]

Hi Sir, this is one of the greatest tutorials ever seen! it's amazing to know that there's an outside air in the process! that's just amazing, thank you for your effort. great video +1

[@TT-vs2ti]

This video helped me understand the function of oxygen sensors x100 better. Thank you!

[@33338899]

thanks - this is brilliantly informative and brings the subject to life so well

[@randalusa]

These are excellent videos. I have been drinking them up for the last hour, the entire batch except two of them thus far. Wow, I am just pondering how much work went into each one and where the cool graphics came from to begin with.

[@billbright1755]

Very clever these scientists/engineers. Air is life.

[@KrzysiekWawrytko]

This is really wonderful and amazing presentation. It has a tremendous educational and also simply aesthetic value. I can watch such videos on hours. Thank you for your time and commitment to produce this animation. It is not so easy as some could have thought.

[@HerrDagerman]

James Buttery: I agree! The steady beat of the music also made me concentrate better

[@atomicdmt8763]

outstanding! I finally understand.........and I enjoy the format: visual and reading/ while I have another video Im listening to

[@douglepera391]

great explanation on the operation of an o2 sensor

[@MrWhiltetail]

Very interesting. I wondered how those things worked. The layers were a little confusing as to where they were. The Platinum wasn't labeled until after it was talked about and it showed two different colors for the platinum once the meter was shown.

[@Oopsie223]

chemistry, physics, and gear heads. my favorite combination. excellent video. now i know why my o2 sensors are throwing a code.

[@tvtvvtvt8017]

Why are they throwing a code?

[@ksukutube]

Terrific graphic motion...and nice background music..Thanks.

[@rediamondk]

I wish I had seen this video a year ago. Would of saved me thousands of dollars. Been to 2 garages and told they could not figure it out! I am no mechanic by any stretch of your wildest imagine, but have figured out my problem. Exhaust leak from exhaust manifold connection to exhaust pipe before o2 sensor on drivers side. 93 ford ranger xlt 4x44.0L

[@Imrankhan-ve2cm]

Very Very Clear one..... Thanks a lot for sharing....,

[@Bill97070]

Thanks so much for a well illustrated introduction.

[@dirkZigander]

EXCELLENT THOROUGH, CONCISE, GRAPHICAL /TEXT Presentation ... Tom Jones, DDS... New Orleans

[@kantaprasadkodihal7136]

great video

[@allanlombola2130]

Thank you your student is gaining more knowledge

[@sans1497]

Easily understood the video...expecting more videos from you ..

[@thealvaco]

Thank you for making me less stupid.

[@erikthered7422]

Was it just on my side or did the music only start at the end of the video? Other than that, this video is very informative.

[@irvinrodriguez7172]

Thanks that's how video b make to understand better ..I didn't get low voltage work now I do thanks again

[@AutoDiagnosticsPK]

Bravo, great explanation through superb animation....first video and here you earn a new subscriber

[@huntertodd7915]

Could you explain ware it gets the air from? Like a signal reference from the intake or ambient air temp sensor? Or how or ware does it get the air to the sensors

[@wardaddy1411]

very helpfull video i like it. try to upload more videos like that related to EFI system

[@user-tk9sy5yz4u]

Thank you 👍. Very informative and clear 👍

[@martajajackson1836]

At 2:45 when it said " The difference in concentration of oxygen molecules in the exhaust gas and the ambient air drives the oxygen ions from higher to lower concentration." Is outside air the higher concentration? Thanks! This video is very well done by the way. It really helped my understanding.

[@ryan_from_tmg]

I know this is 7 years later, but yes the higher concentration of oxygen molecules would be in the ambient air, since the oxygen inside the exhaust was mostly used up during combustion.

[@vg23air]

so, the heater circuit, is it on the entire time, not just used at startup to warm up the sensor ?

[@endurofan9854]

wow nice old but Gold 😎 thank you for sharing

[@TheHeatingEngineer]

A very informative video; thank you. You might go the next step and show how to test the sensor with pros and cons of different methods eg DIY and professional methods.

[@davidhall3747]

The easiest way to test an Oxygen Sensor is to send either Positive or Negative voltage through the Signal Wire Utilizing the Cars Battery. Just use your body as a Resistor when testing using Positive Voltage. Real Fixes Real fast, shows how to test the Oxygen Sensor utilizing this Methodology.

[@AbuDujana692]

Great work....Crystal clear

[@kledomuc1713]

Thanks, perfect explanation, thanks.

[@Mahigeer1]

Thank you for posting.

[@Frayicz21]

just got a check engine light yesterday on my 98 prelude, gotta change the the o2 sensor asap

[@JamesPond-cd3tp]

Bloody el that's complicated but I understand now thanks!! I have a P0299 turbo underboost code due to a split intercooler hose to the throttle body and I have an O2 low voltage DTC....wonder if the two are correlated? Any ideas clever mechanics out there??

[@dynamn]

Does this require to be cleaned at regular interval as the mass air flow sensor please?

[@patrickgarrett2786]

love your videos

[@juandaledingle3183]

how does oxygen flow electrons at a different rate depending on the concentration of oxygen in the exhaust gas?

[@lalbiakdikachongthu9204]

O2 sensor in my bullet bs6 bike is defected due to hit by other bike so the sensor light is lit but sometimes not lit will it be ok without changing it? how will it effect to my bike?

[@Bigboinkies]

I think this is Electrochemistry of an Galvanic cell and it uses the Nernst equation.

[@epi42O]

this was great, thanks!

[@ak540i2]

Excellent video. Very clear and detailed. Just one question: What exactly does rich or lean mean? Rich=high voltage=low ratio of outside O2 to exhaust O2=not full combustion of gas in cylinders? Is this correct?

[@enoxosr1]

Rich means that the fuel to air mixture has more fuel than the specified operating value and lean means the air is more than the specified value.

[@anshulkumarsingh3802]

wonderful video ... hats off !

[@docgaurino589]

Is it posible to bypass the connection of sensor temporarily until there is a replacement. Old cars has no sensors and last for decades.

[@ngoctranminh7159]

Great video. Thank you.

[@PinkBunnyEragon]

excellent, Love it, thanks!!

[@AmharicMusicLyricsVideo]

best explanation please can u make for other sensors how they work mechanism

[@pauldarrigo4395]

On the down stream O2 Sensor, I am not getting any trim... The voltage varies but the trim is steady. I have changed the sensor twice. Id on get knock senor activity at over 4,000 RPM's 2005 Mazda 3 any thoughts?

[@israelmacotela6817]

Good video! Thanks so much 😊

[@da8ish1]

nice video. you show the current flowing from positive to negative in the external circuit. wouldn't it be the opposite? thanks

[@econoko]

Very good video. Thank you.

[@automajstorijediy]

so if second o2 sensor monitors work of catalytic converter,he dont afect on fuel-air mixture ? he s hhere just to signal a bad catalytic converter ?

[@jctyoga]

Excellent ASE A1, L1 study material.

[@stevepham2631]

great video, i don't know why all the criticism not like these people making any video themselves.

[@HaiderKhan-ri4sj]

very nice its easy to understand how the engine works thanks.

[@parnamsaini4751]

Keep watching. Most welcome

[@applesteven6436]

Can it be repaired if it's failure. Mine is S2 for Honda accord SDA20. The price is too high here.

[@midwestriders1]

One thing It didn't say but its pretty much common sense is when the PCM receives a lean signal around .1 volt it grounds the injectors to stay on longer. When it receives a rich signal around .9 volts it shortens the time the injectors come on.

[@gitahimugo1714]

Great content ! I expected something about post cat sensor though

[@allgoo1964]

Great visual explanation!! Which sensor should be the first to be checked for cleaning, or replacement?

[@oldgeordiegeezer3086]

Basic fact - people who want to learn stuff don't want to read it, they want it explained to them. And here's another basic fact - it's not possible to properly absorb information while listening to music.

[@darren9819]

Super video very educational!!

[@roomsongs.1st]

i am every clear with your Video guide . could u make more video about vehicle ? i hope u can share your video to help improve about knowledge? thanks

[@nojandethgore7061]

Im glad to see this

[@user-nc4mv2fh8k]

thank for your information

[@LarryPeteet]

AWESOME Graphics! Thank you.

[@cagr4249]

Description/explanation for the sensor before the catalytic converter is not correct; nowadays in this position a measuring sensor is used.

[@davidgruen7423]

I still don’t understand it, how does it know the difference between rich and Stoich? I mean since both stoich and rich use up all the oxygen in the exhaust, then essentially there is no difference in the makeup of the exhaust for these two conditions, unless stoich is defined as still having some percentage of oxygen in the exhaust.

[@sujithrao7974]

Brilliantly effective!!

[@zanevigoren1519]

More like defective, o2 sensors fuck everything up

[@PresCalvinCoolidge]

Nice video but could you explain why the signal from the O2 sensor oscillates between 100mV and 900mV?

[@rubencruces8444]

I have the same doubt, did you find the answer? There are many engine revolutions for the ECU to control the change with injection pulses.

[@henkmoesker1313]

If your airflow in the exhaust would go up, there would be a relatively large amount of oxygen passing through the sensor. The outside conditions would not change. The increasing airflow would have nothing to do with the lean/rich condition in considering the air (oxygen) / fuel ratio?

[@mraltex]

I understand what your point is, but what you are missing out on is that both the oxygen molecules and the rest of the exhaust gasses is moving at a given rate... This means that the oxygen molecules will just be within the sensors housing for a short time, then they will pass through to let the next molecules to take place within the sensor "housing". There is nothing with the sensor that makes only the oxygen molecules "stick" to the sensor. There are just as many oxygen molecules within a given space, for example inside the sensor range, aswell as in the rest of the exhaust, depending on oxygen percentage in the whole of the exhaust gasses.

[@nivyao]

Then the temperature will tell if it is rich or lean because the heat can trigger the voltage then pass to the ecm/ecu

[@bennymor5421]

love it very easy to learn like that

[@sierrapoyf]

good video!

[@m50halifax5]

thank you good disruption of upper and down 02 sensor , do you have any more helpful videos

[@laprepper]

Great video! Now if I could only find out why my RX300 hates knock off brands like Kwiksen...

[@justynbumpus1070]

cool video!

[@affan5759]

best video tht i have ever seen

[@sc-mh3jj]

awesome channel

[@allgoo1964]

Replacing the faulty O2 sensor does nothing to improve the quality of the exhaust. Am I wrong? What was wrong with the tail pipe test then?

[@breakernoah]

great videos keep up the good work.

[@gsparks77]

Excellente video ,,,, !!!

[@CHENNAICARTECH]

excellent

[@neoneo7816]

Good Explaination

[@kthwkr]

From other sources on the internet I have found that the temperature to which the sensor has to be heated to operate is 600F. Wow! That's hot. Don't park over a pile of leaves.

[@timothynelson3063]

just need to know if an on sensor has anything to do with I motor bogging out when at a stop light if the air conditioner on

[@CProgrammer3088]

You ever fix that issue?

[@CanadienFrancais22]

So what happens if you put it straight pipe, will the engine work as it is supposed to ?

[@70corwin]

CanadienFrancais22 NO

[@minbannister3625]

Great video, now I know why used cars are worthless and why manufacturers are going bankrupt.

[@alvinlawanto]

What is the normal range? How much percents?

[@SP330Y]

EXCELLENT VIDEO EXPALINED VERY CLEARLY AND VERY INFORMATIVE - The mixture on your car could be made to run very lean if a resistor was placed inline with one of the leads coming from it, this would reduce the voltage and the ecu would run the car lean :) great for high emission engines that fail at the dreaded mot

[@PepeRoldan1961]

Wouldn't the ECU detect a lean condition and make the mixture rich?

[@jrdn.lauren]

not when its on idle (like when testing). And if it is running rich, the resistor would only drop it slightly to make it look like its juuust right. ecu tells the testing equipment everything it peachy and you get the green light.

[@vladisavkuzmanovic66]

SP330Y gde je na motporu citroen c5 1,8 i 16v lambada sonda

[@theravedaddy]

Didnt those bullshit plug in power chips from back in the day do the opposite? By fooling the ecu that it was lean n making the car run richer..... for £125?

[@marknorth1221]

theravedaddy i think you need to increase the voltage to fool the system into thinking its ritch so the injectors run a bit leaner, that should give better economy, but be carefull not to go too lean or its bye bye pistons and plugs, there are some aftermarket products that should do the trick. If its a single wire o2 sensor then you could probably DIY with a voltage reg, a trimpot and AA battery

[@kimamaral3015]

No sound? The audio cuts off at the beginning and only comes back by the end of the video

[@mandapallisivakumar197]

How to calculate Dissolved oxygen in mg/L using Galvanic DO probe sensor (mV output)?

[@terminajuju2662]

All I needed to know, let's straight pipe that bad-boy right now

[@alexteixeiradeoliveira3181]

I like this video 👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻

[@nisbas]

Great videos... Thnks for sharing