How to Replace an Oxygen (O2) Sensor

[@flavioanguiano6812]

Firestone charged me like 370 to do this (4 years ago) and i had seen a video similar to this AFTER. Ever since then i have been able to do all my repairs on my vehicle thanks to youtubers like you! U guys are the real heroes out here, an o2 sensor for my car brand new is only 40 bucks. I could have saved 330 dollars had i been smarter at that age.

[@trevorgriffith8994]

Damn garages rip u off blind.

[@erich2770]

Okay for whoever reads my comment, this is important when replacing an O2 sensor. You HAVE to make sure the wires are as straight as possible and not twisted like this guy left them, the 02 sensor will probably still be "bad" if they are. And after hand tightening it then turn it a couple times with a socket to make sure it's tight but don't over tighten and make sure not to bend the 02 sensor or dent it or anything because they are very delicate and won't work properly if you do.

[@erich2770]

Also if you have enough room under the car by the sensor that you can fit a wrench, it's 7/8 is the universal 02 sensor size. But in a lot of cases the specialty tools are needed.

[@noureddineelaroussi7680]

Good instruction and good lighting, God bless you my friend...

[@dorothysfriend]

One of the best instruction video's I've seen. Very clear. Thanks, I now know what to expect with labour costs.

[@00100000station]

Best Tutorial Video Intro Award! - This is the best, most concise and accurate tutorial video INTRO I have EVER seen on youtube. And in 2012 - you were so far ahead of the curve. Damn!

[@mymoneychannel]

Good video! You are so right about the hardest part of this job being getting the sensor out...In 2011 on a 2000 Toyota Tundra I needed to replace the exhaust manifold on the passenger side because neither myself nor a couple different muffler shops could get the o2 sensor out! It was a real pain! I'm doing the other side in the tomorrow.

[@andrewrovello3973]

I've been looking at O2 sensor videos and yours is the most helpful by far! Thanks so much!

[@broadcastyoselffool]

I used a thread chaser on my bunghole, and now it hurts really bad. Should I put some penetrating oil in there?

[@hulkhatepunybanner]

I'm not an expert on those but you probably should do that.

[@SomaliDibJir]

lool Beavis and Butt-Head. That's old school.

[@sharon8022]

yeah, lube it up well..

[@iamshango3005]

You'll be ok. You probably won't answer just like everyone else. So I get what I get. You get what you get. I'll make it alone. When I called nobody I mean nobody answered call text mail email. It is what it is. I wish nothing but love towards you guys. I'll be where you left me. Live lol can barely survive think I haven't been in this position.

[@iamshango3005]

That's what she said

[@Eggwich]

Straightforward instruction with good production. Well done. Only thing I would change is I would mention what model car it is you are working on, because I liek cars. I'll check out the other vids in this series for sure.

[@antguy-superheroextraordin7835]

If I keep having problems with my car, eventually I'm going to be a master mechanic. Thank you Chevy for the opportunity to get to constantly fix shit and thank you KZbin for allowing random people to show me how to fix it.

[@eddielorenzana2320]

Eric Cartman man I feel the same way with my H3 hummer. Lol

[@tucoramirez6678]

Thanks for your contribution Ben. I would only add this: Since the "O2 Sensor is one of the most misdiagnosed problems in a car;" and "there are lots of (other) parts that can go bad and cause..." the scan tool to throw an "O2 Sensor" problem Code, it sure would have helped the average "Do It Yourselfer" to know what those other problems could be. That way the DIY-fer watching your video can first test for those other problems to try and eliminate them, before going out and buying an O2 sensor which can be very expensive if you want to stick to OEM parts. For example: My gangster VW Dealership in Bethesda, Maryland, gave me a written price quote of $268.95 just for the O2 Sensor for my 2008 VW Jetta! Their "Labor" cost for the installation will probably be about another $300. Highway robbery! Some of the possible problems should include: a Vacuum hose check. An old, brittle, porous or cracked Vacuum hose (line) will cause extra O2 to be pulled into the exhaust manifold, thereby causing the Sensor to throw out a correct reading of "O2 Sensor problem." But, the problem in this example IS NOT the sensor! The problem is the high oxygen to Fuel ratio. The sensor is just doing it's job telling you there's too much O2 coming into the system causing it to run "lean." But, unfortunately reported as "O2 Sensor problem," when in fact the actual problem IS the Vacuum hose/line which needs to be changed. Other problems which will cause an "O2 Sensor problem reading include a defective heater wire (Check the resistance on the heater wire with an Ohm Tester (a.k.a. Digital Volto-meter). A low resistance reading on the heater wire means it's defective). Also, a loose or missing gas cap can also allow extra oxygen into the gas tank which will mix with the gas and will throw off the sensor which is also pulling in oxygen from the ambient air at the neck of the sensor. That ambient air intake, combined with the extra oxygen already mixed in with the gas, will cause a much higher O2 reading by the sensor and will trigger the check engine light. Upon scanning, a good scan tool will throw an O2 sensor problem code. But, the true problem is the loose or missing gas cap.

[@StackXBT]

I have a downstream o2 sensor code..says the heater to the 02 sensor isn't working..I looked under the car at the sensor and the wires looked exposed..question is would replacing the 02 sensor resolve the problem? Checked the fuse..its good

[@lynchknot]

I believe 99% of auto repair shops will rip you off. One time I checked a few shops and they wanted a couple hundred dollars to replace an O2 sensor. I did it myself in just a few minutes. After driving around for a while the check engine light reset. This is how much a repair estimate is for my 2010 4runner: $493.63 or repair pal estimate: $372 to $673 with parts included. For labor only: $127 per hour X 2.2 hours. What? two hours to unbolt one sensor and bolt on a new one? RIPOFF!!

[@tbone9246]

I got all 4 replaced for $160.00 labor. I bought the sensors myself. I was also quoted 2.2 hours for the 2 bank 2 sensors. 1.9 hours for one and .3 for the other. 1 shop quoted me almost 200.00 labor for just the 2 sensors. I have a Jeep Grand Cherokee 5.7. Me and my brother both got under the Jeep, no way to reach the 1 for sure. They must have to drop the exhaust and such for the 1 to be quoted as a 2 hour job. The owner of the shop even sarcastically said his mechanic had a fun time replacing all of them. 2 were 55.00, 2 were 30.00. Autozone has a deal right now on Bosch. I got a 20.00 gift card on each 1. So for about 260.00 I got all 4 replaced, pretty good deal. I figured I'd just do all 4 since I already needed 2. I'd recommend that to everyone. If 2 go the other 2 will probably be on their way out also.

[@tbone9246]

I'm lucky, I just found a great shop by me. Family owned and you can trust them. Fair priced and they do the job in a timely manner. My buddy who owns a collision shop recommended the shop to me. They just did all 4 O2 sensors cheaper than I was quoted for only doing 2 sensors at another shop. It's awesome to have a auto shop you can trust, is fair priced, and has great mechanics.

[@justinwilliams1582]

9

[@metekavruk_Alanya]

​@NPC Same shit happening here. Trying to keep alive A jag x type which is very common Ford engine but guess what? They refuse to fix the car or ruin it. Some other friends told me they can not even repair VW Golf cars here so people drive 250 km away. Here is 300k + population but mechanics did not educate themselves for more complex work. Only car they can fix here is from 1980's Fiat and renault tx 12 cars :) That is their knowledge base still. :) So i also think to invest on repair tools - maybe will cost less for long term.

[@mymjctube]

thanks! this was the easiest one to understand, plus you explained the anti-seise & penetrating oil. MUCH appreciated!

[@drehsanshinwari]

Hi Boss I like this video I would like to know the location of Bank1 and Bank2 O2 Sensor for my Ford Taurus 2006. waiting for your answer thanks.

[@henryreyes9395]

You splain that,so clear.Im so happy with you way to show us to do this job.God bless you,my friend.Thanks so much.

[@SomaliDibJir]

An O2 sensor is also most reasons why "Your favorite mechanic" would have you replace an innocent Catalyst, then have you buy O2 Sensors (Up and Downstream). Why, well according to him, if a Catalyst is bad most likely an O2 Sensor is bad too, even though the Catalyst was never the problem; the O2 sensor/s were. So you're down, 3, 4, 5 hundred dollars with a smile. OBD2 Code P0420 is where the money is. Catalysts don't die easily but lots of crooks would have you believe it so, most of the time a downstream O2 sensor behind the Catalyst is what creates this OBD2 code, along with bad gas, bad air filter, leaking gases, and many other things. So be aware, always have a second opinion. Thanks for the video.

[@GiotheGhreat]

you are right about the crooks, I always look for a third opinions after checking several KZbin videos, etc, some mechanics are just fucked up

[@SomaliDibJir]

***** I believe most mechanics are crooks, that's how they'd make money, the same reason I became a devoted DIY. Online you can find a Bluetooth based OBD2 reader for less than $50, which you can use with a phone app called Torque, search the fault code online, watch it replaced on KZbin and find how relatively easy most of the things are all the while feeling good about yourself. Hehe

[@lastuberman]

3, 4, 5 hundred? The cat for my car costs over a thousand dollars. I changed out my O2 sensors for $50 each and no more P0420 code!

[@SomaliDibJir]

lastuberman Yes absolutely. Some cats cost you over a K, specially in California, and common sense is gonna dictate to replace sensors (Specially upstream) after cat has been replaced, so replacing sensors first and see if you get lucky is a wise move for DIYs.

[@tommydtomdecrescenzo8851]

Thanks Ben! That was super helpful. Mine is just hanging off. Because of all the potholes in my county, the underside of my car is taking a beating. Like you said, O2 sensors live in a horrible environment. I wonder if I can just clip it back on so it's not hanging? Anyway, thanks again.

[@iamrico2099]

You did an excellent video. Thank you very much. But should all sensors be replaced when one goes out?

[@opticsrus9981]

TY. The vidoe was 100% spot on. The disconnect was the hardest part because we are blind to the upper part of te the trans. Thank you so much for making this youtube vid. I t eased my frustration a little. lol ^-^

[@Saberdudy]

Worked great for my 2004 Ford Explorer. Thanks for the help!

[@bobarnold4435]

Lovely video - anticipates problems such as non-OEM wiring. I am assuming that bank 2 O2 sensor is on the drivers side. Tkx

[@MrMschoose]

Good concise, instructional video. Thanks. I'd like to know what the recommended installation torque values would be for most O2 sensors.

[@ponchatoularoux2373]

hey, thanks. very short and informative videos are always appreciated. i bought an 02 f150 xlt with 160k miles. im replacing the boots and plugs and also the fuel filter tomorrow. should i also just replace the O2 sensor while im at it ?

[@mrmikesabo]

Liked the video. Thanks. I didn't understand what you meant by soaking sensor in penetrating oil and how it's done. Can you explain a bit more please? Thank you.

[@JVaughnDavis]

Thanks man, that will save me a ton of cash. Very thankful for this thread.

[@shirleyanngilbreath4353]

Thanks a lot, you would not believe what the mechanic put me through. OMG 📎⛓️⚙️🔩🗜️🔧

[@jokson1000]

thank you, for your supporting. actually it work for me, I have kia Sedona 2005. the check light engine is one. and I just do it myself. and now it perfect, everything is good.

[@Star-dz3ei]

This was an excellent video on how to replace an o2 sensor, thank you!!

[@reggiehowze1891]

Thanks. I bought the second socket to change the front one. But didn't know there was a second one. Thanks. I have correct tools so it's time to git'er done

[@garygrella1723]

Why would an O2 Sensor be installed in the exhaust pipe ? Isn't all the oxygen consumed in the engine ? Very clear and understandable video. Thanks, Gary

[@444lancer]

great video it was worth the look and makes it ease for me. There's nothing like saving 200.00 dollars. Thanks

[@peterscozzafava1253]

you make this look easy,i have problem with stripped nut,any idea of how to tackle this?

[@Nacturnal702]

Good advice i changed 2- on a 95 Cadillac Concours/Northstar Engine,I have researched that Buicks and Olsmobile also have these engine's and man the ones by the firewall are crazy,,I had to use 2- 10 inch extender adapters with a woble drive end and a 7/8 crowsfoot,wow! never thouhjt a car could have so many specialty tools to fix it ,so much for that thanks again for your tips and advice.

[@americancopcar]

Very informative. Would love to know how you worked out it was the O2 Sensor. We have a 2006 Ford CVPI and would love to see how you would change all four of them.

[@suzannehutchins8326]

Great video. What is the cost for a 02 Honda oxygen sensor? Thanks, Suzanne

[@markclaytonhair1040]

Thank you for the video, - Does the truck need to be serviced or re configured after replacing the sensor?

[@unclematt3]

Bang up video! Thank you for taking the time and helping us out!

[@cantorianovm91]

Sup man grate video and wanted to know what would happened if I take out the catalytic converter and replace it with a extended pipe with the rear 02 senior plugged in and with the muffler on as well

[@jaycoba7274]

Thanks for the video it’s really helping me , don’t know anything about Mechanics but I want get into it because recently bought my Second car and i don’t want mess anything up with the car (1991 Pontiac firebird formula) so I’ve been doing my research :)

[@antoniot3770]

Great video, al i would add is the prep for disconnecting the sensors; like disconnecting the negative terminal on your battery before you start ( and writing down your radio stations if you dont have them memorized lol. And what you do after it is all done to test your work out.

[@MrMschoose]

Gut und tight -- lol -- I like that. Thanks Ben. Wow, the auto parts store -- O'Reilly -- looked it up on their computer and told me that it was 60 lb-ft. which sounded kind of high to me. It's a '96 Ford Crown Victoria.

[@richyscameracaptures276]

Man, I bet you love that Crown Vic now. These new cars are crap.

[@ibanezjorge771]

Hi thanks for posting this video my question is in a dodge ram 03 1500 is the same process?

[@pedrocisneros5370]

replacing an o2 requires basic knowledge as far as proper removal. if an o2 is commonly misdiagnosed, then a video showing what you guys did to determine a faulty o2 would make more sense

[@firaz9090]

Pedro Cisneros he has used an obd-II scan tool and it had shown the problems to be diagnosed, there is a video in his playlist I lf you want I'll give the link

[@randallkennedy7414]

I was told by one garage that I needed to replace both O2 sensors when my check engine lite appeared. It was not the O2 sensor. It was the air flow sensor to the air filter. Glad I went to a garage that had a qualified technician to go thru the codes and pin point the real problem. The air flow sensor cost more than the O2 sensors, but I could have easily been stuck having both if I had not found the right garage and tech.

[@tbone9246]

@@randallkennedy7414 , I think that's what I replaced awhile back. When that air flow sensor is bad it will also show a code saying an 0-2 sensor is bad sometimes. That's what I was told at least. So as you did, replace that first and see if that takes the code away saying an O2 sensor is bad.

[@Maidendg]

Exactly why I learned to work on my own vehicles. You would not believe some of the diagnosis and cost of repairs I hear, being a female they think I'm mechanically inept and stupid. Even when I bought MAF cleaner I had to be instructed not to put it back together until its dry. Do car parts store people say that stuff to you guys? I'm waiting for my O2 sensors to arrive from Amazon today, I bought 2 upstream to replace both though my code only shows one not sending signal to PCM.

[@rdominick1968]

So I watched your video and enjoyed it. I bought a generic sensor for a 2007 Chevy Impala upstream sensor and it doesn't come with a wiring diagram. Any Chance you could help me identify which wires connect to which? Any help is appreciated.

[@cameronthorburn9171]

Thanks! I owe you $200!! BTW a 7/8" open end wrench worked fine for me.

[@codyq0987]

Hello, Thank you for this great tutorial. Q> May you recommend a good anti-seize compound that I can buy locally in store in case my new O2 sensor has no anti-seize compound on it? Thank you

[@MonnoPark]

thank you, this video helped a lot. life saver and money saver.

[@esbliss]

CC is so easy to turn on during the production of these videos. We the hearing impaired cannot enough these that are not CCed. Maybe in the future you will be so kind as to turn it on thank you

[@windypup8845]

I have an 02 sensor problem but I was told to check it's fuse first. Also using a multi meter to see if it's getting power BEFORE you start on the sensor.

[@brimonee224]

Extreme difficulty accessing the electrical connecter on top of the transmission, any tips?

[@LifeWorthHealing]

Any one know?

[@Mike-hn9iy]

Good video 👍 Quick question if I need to replace 02 sensors downstream, is it a necessary to replace upstream too?

[@angryamerican5426]

All in all you made it look so easy. I changed the same one with NO issues as well as the 2nd one on the down stream side. Why don't you show how to change the up & down stream o2 sensors on the right side (passenger side) that would be useful information.

[@tristantobar140]

It really would

[@iamshango3005]

I'd be an angry American too. I know I am

[@americancopcar]

Also what chaser set did you use? I’m struggling to find the correct ones for a 2006 Ford CVPI

[@iamshango3005]

I have 06 Marquis. It is a cope car

[@iamshango3005]

Mines barely moving

[@robmarshallofficial]

WOW, to see KZbinrs NOT responding to messages and leaving people wondering for x2 years. Obviously they care for their fans and followers

[@Gsxforsale]

Is “catalyst emissions below threshold” a bad o2 sensor?

[@brandonfoxworth1769]

Hey awesome video! I'm afraid but I have an 2005 Chevy cobalt that needs an o2 bank 1 sensor 1! You think it would be difficult?

[@kanoo3285]

Thanks for the very informative video. I have 2013 Accord sports, got a check engine light on one day ago, got it checked Auto Zone and it turns out to be O2 sensor. Don't know if it's upper or lower. Kindly let me know how to find out which one and if I should buy the aftermarket or the factory part. Also, where can I find this part on my car. Thanks a bunch in advance.

[@rgruenhaus]

AutoZone's error code readout says if it is an upstream or downstream

[@zmaninpgh]

Great video, just wish you would show how there is an upstream and downstream sensor and which goes where....

[@jeremyargiro8254]

Nice video bro, short and to the point! thanks!

[@bobbofly]

A very important step omitted in this otherwise excellent video: start & run the vehicle for several minutes to heat the sensor and the threaded fitting containing it. this will also help avoid galling on removal. be sure to wipe away any excess penetrating oil from the area before starting engine. Also bear in mind that the sensor/manifold/pipe will be extremely hot, so use caution.

[@4letternameproductio]

Very useful tip! Thanks for sharing your expertise. I have one question... Is it alright to replace the oxygen sensor for the purpose of increasing miles per gallon? My '05 Camry's mileage consumption dropped from 32 mpg to 25 mpg. There is no hesitation when starting the engine, no engine warning sign of anything. Thank you in advance for your input.

[@farukatasever2933]

Sensors are Wear,tear item.If replaced, gas consumption gets better technically.

[@RoadandTrack]

We agree. Good stuff Ben!

[@Dubov1933]

So you put the penetrating oil on the 02 sensor that is already installed to make it easier to remove?

[@RobbbNY]

Correct

[@junoskinner3718]

Dumbest question of the year.

[@brandonreal916]

not a dumb question if you don't know stuff about vehicles :p

[@husq48]

Then the anti-seize on the threads of the new one...

[@oneofthemodels]

Yes you something like PB Blaster soak it at least 24 hours before if not 48 hours with multiple sprays

[@kennydixson7851]

Looks simple enough, but like you said you did a lot of work to find out it WAS the O2 sensor. My 2013 Explorer using the obd says two codes P013C and P013Cpd so it could be a number of things. Would like to know how you determined that it WAS the 02 sensor.

[@sharon8022]

thank you. you made it look simple and not complicated. =)

[@michellacasse9250]

Great video info will a Crow's feet socket will do the same job?

[@inerfyr]

Yes

[@michellacasse9250]

@@inerfyr Great Thanx for the Info Brotha

[@inerfyr]

@@michellacasse9250 u betcha. As long as its the correct size, you're good. 22mm was the size on my vehicle.

[@Citizens794]

Was the sensor at the front or the back? Can you plz show where can we find it. Thanks

[@antoniot3770]

yes it can, i own a mazda tribute and have changed 2 of my 4 sensor and with no jack at all. However i'm not sure about the last 2 sensors, i just may need a jack for those 2?

[@robertwalker7633]

great video. is there more than one O2 sensor

[@boloylokombo6102]

+Robert Walker on some car there is 2. upstream and downstream, I have a Lincoln LS 2000 and it has 2. after watching this im going to change them both just to be on safe side

[@tyquan61]

Yes usually there are 4

[@JStyle1616]

Thanks! I appreciate your advice.

[@terrycoe1602]

How did you diagnose the O2 sensor versus the Catalytic converter failure?

[@chrisgeary5597]

is the code for an 02 sensor pretty straight forward? Could it be confused with a catalytic converter? The mechanic I went to says its the converter yet a trusted source in my family read the code for me and said its an o2 sensor. 2 jobs with a huge price difference. any advice?

[@ninobrown3323]

Have u ever done a oxygen sensor on a 2001 Lincoln Ls? Any advice for a first time?

[@Dblade981]

When should you change your 02 sensor usually?

[@RedRedDaDon]

I think I need this done. My DTS Cadillac doesn't seem to read the right gas level, unless I fill the tank and keep it over half full.

[@tedrodriguez8912]

Thanks brother for the tip.😎👍

[@luisamedina1]

Hey Ben, great video! I've received my "O sensor" without the plastic protector that goes around the metal end, and there's grease all over that end. Do you just wipe it put clean with a piece of cloth, or do you use something else, since that is the part you'll screw in? Thanks in advance for your details, Ben!

[@juanguevara7219]

Thanks for the video.. need to change mine in my firebird 1999..

[@trevorwatson5047]

Which side of the vehicle do you replace with the P1148. is it the driver side or passenger or both?

[@cellgame100]

Is this more or less the same on a buick rendezvous and could I also use a line wrench assuming I could get one in there.

[@ThecardoctorTV]

you might be able to get it with a 7/8" open end wrench but the special socket is probably your best bet. Good luck

[@cellgame100]

Thank you.

[@clevelandwilliamsjr6863]

Hi. I'm cleve. Thanks i seen your video for oxygen sensor. A BIG HELP!!! I appreciate what you do.. Saving all of us money. I have a 02 Chevy Silverado. With no catalytic converter. Just a muffler, and this truck sounds high performance. Only purchased it 90 days ago. I would like to take care of it because it runs great until now. Wish I could send you some photos of what my diagnostic tool is reading Mind if i ask for help ? I have a diagnosis tool. Gave six different codes. Some minor. But says a fuel injector is faulty, and malfunctioning. Code po200. / and po300.. For multiple cylinder misfire. The diagnostic tool I used is INNOVA tool. How can i get more info. Thanks again for the awesome videos you post. Be safe

[@KoRnmorgan]

Really nice video,just one question thou, s dat a truck? Or a car ? D one ur workin on? Thanks 4 posting d video.

[@dorycetrangolo7223]

Wonderful Job!!!

[@richards6168]

so a shop said $250 for them to replace i found a new one for under $50 this video is great

[@michellew786]

so if 02 sensor code is reading check engine light is on changed front sensor and coil pack is it the back sensor then? car is missing some not bad just in idle

[@davidle7063]

Hello, thanks for the video. One of my car had CEL code for "too lean" condition, OBD2 scanner found really high LTFT (15%). I troubled shoot and found out it was caused by a bad O2 sensor. Replaced it and fixed the problem. I have another car (2001 BMW 330I at 160K mileage). LTFT and STFT of both banks are ~ 0%. My question is that if 0% LTFT is a clear indication of good O2 sensor? Thanks much.

[@trishalozano8463]

Can you tell us about the downline 02 Sensor on a 1998 Lincoln Continental? Thanks

[@adolphuslast1731]

You ate the man, thanks

[@cubicalcraps]

Can you show a easy way to change O2 sensors for infinity fx35, there are 4 different sensors and two camshaft sensors. Do you suggest to have a car fully maintained after over 200.000 miles to replace all of them at once? !?

[@dimatadore]

I'm getting that problem right now it seems, and my car has different sensors for front and back. I'll have to do more research on which goes in the front and which go in the back. Probably will be easy peasy to find the information though I'm not worried. I just want to get the right ones for my car.

[@RobbbNY]

Stop by your local autozone or advance auto and they will give you a code. Punch the code into google and you will see which sensor is bad.

[@dimatadore]

You're awesome, thanks! I actually have that code but I didn't know it worked that way until you told me.

[@doctorj2111]

it took me about a month to get mines off cause I thought it was impossible I broke it in half drilled it soaked it with liquid wrench blow torch it finally l use the socket wrench what size I forgot twisted back and forth and the little piece that was left finally came off now I have to replace my downstream 02 sensor I don't think I can do this again

[@ladycastille73]

Do u have a video that shows how to splice those wires and put them back in that plug??

[@louielugo3705]

Thanks man. Appreciate the video help honestly.

[@willosborne9958]

I have an OBD code P0135. on my 97 Bonneville. Is this sensor underneath the car as well? Was told I would just have to replace O2 sensor.

[@khoharo]

I like how you explain

[@idsoftware7]

hi Ben whats the difference between Air/Fuel Ratio and O2 Sensor ??

[@martinrobert6688]

That sensor makes sure there's a perfect amount of air and fuel mixture in the engine.

[@Captleemo]

Is it necessary to unhook the battery? I have a 2002 Tacoma that the code reader said the check engine light was the front sensor which is a heated sensor.

[@superkwame1904]

Lee Mullen I would alway unplug the battery at at any time you are working on electronics in a vehicle. I think is the safest thing to do, wear glasses no loose clothes.

[@danielcouture4126]

Hi, thanks for the video. I have an 01 Infinity G20. My check engine light came on after a long 7 hour drive. It also has a constant reving to the engine...up and then down over and over again. The overall idle is really high too. I have pulled the mass air flow sensor and cleaned it, it did not help. We've been told it might be the idle air control but that seems like it is for idles that cause the car to stall. I am really hoping you can help. It looks like the o2 sensor is on the top of the engine. Is there a second one on my car? Thanks!

[@kdinh9991]

Hi Ben, I have a check engine light on my 2000 Lexus RX300, and my ODB II shows I got P1130, P1150 and P0141, would you let me know where are these locate it and how can I fix it? thanks

[@vincentleeadams]

Clean and to the point!

[@brucelayman525]

Ben, I have a 1994 Plymouth Acclaim. The engine light started coming on and the car began surging when getting up to speed. I turned the key on and off 3 times and read out the following codes 12, 21, 34, 55. The 21 is an oxygen sensor (too rich or too lean). The 55 is end of codes, the 34 is cruse control servo failure, the 12 is battery disconnect/computer reset. Thinking of having the oxygen sensor replaced - best estimate is $160 so far. Car has 180k+ miles. What do you think? Could the oxygen sensor be causing the surging?