How to Check and Replace an Oxygen Sensor (Air Fuel Ratio Sensor)
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- čas přidán 4. 02. 2015
- Oxygen sensors (Air fuel ratio sensors) are a common problem on many vehicles. A P1155 or P1135 code indicates you have a bad sensor. This is common in Toyota and Lexus cars and trucks. Learn how to test the air fuel ratio sensor to see if it is bad, and then learn how to replace the bad sensor.
Nice O2 Sensor Socket Kit: www.amazon.com/gp/product/B005...
OBD2 Scanner to get the codes: www.amazon.com/gp/product/B006...
Multimeter I used: www.amazon.com/gp/product/B001...
Here is where to get inexpensive A/F Ratio Sensors: www.amazon.com/s/?_encoding=UT...
Some background info on difference of Oxygen Sensors and Air/Fuel Ratio Sensors. What distinguishes Air Fuel Ratio Sensors from regular O2 sensors is that the AFR Sensor is what is known as a wide range O2 sensor whereas the basic O2 sensor is a narrow range sensor. It can detect a wider range of air/fuel ratios than the basic O2 sensor. Also, the AFR Sensor has a little bit more circuity to enable it to detect more minute variations in the exhaust system air content (more sensitive than the O2 sensor). Therefore, it is able to make better adjustments through the ECM to add or subtract fuel to produce a better mix of air/fuel to maximize efficiency and minimize emissions.
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Disclaimer:
Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix. - Auta a dopravní prostředky
The only clear and concise CZcams mechanic that doesn't try to flex how much he knows for 15 minutes
ironically chris is the best flexer here
Instablaster
So you don't like actually learning in depth of what you're doing? What a shocker
Cap
It was before longer videos make more money so that's how it goes.
Google search brought me here... As soon as I heard "hey guys, Chris fix here"... That's when I knew I'd learn how to fix this!! Thank you!!
Hello my friend 👍
Out of all the oxygen sensor videos out there, this is by fair the best one. I kept slipping it as it isn't even 5 minutes longs where as others are 20 minutes long so kept thinking there wouldn't be much info in there. You gave more info in those 5 minutes than all the other videos out there put together. Thank-you.
You're the BEST Chris! Thanks for your consistent, high quality videos. Never lets ya down! Thank YOU!
One of the better channels as regards camera techniques and presentation.Very clear diction and makes the
viewer feel that he is part of the action.Plenty of resources supplied and a willing attitude to share wisdom.12 out of 10.
Tom OConnor Thanks a lot Tom! I am glad my videos have been helpful! I really appreciate the feedback!
ChrisFix
Hey Chris.
Great video as always.
Congrats on 2 million subscribers.
Keep up the good work. 👍😆👍
We are manufacturer of oxygen sensor, nitrogen-oxygen sensor, if you have a product demand, you can contact us + 8615957779261.email: 772379228@qq.com
We are manufacturer of oxygen sensor, nitrogen-oxygen sensor, if you have a product demand, you can contact us + 8615957779261.email: 772379228@qq.com
Totally agree! And he has such a pleasant, happy demeanor.
+1 for showing how to test the old sensor!
Austin Gilbert Thanks!
@@chrisfix sir, my i20 O2 bank1 sensor reading is out of the recommended readings as shown on OBD2 SCANNER.
I don't have any troubles codes in the scanner. What's the problem with that reading out of limit?? Thanks.
@@chrisfix so if sensor has continuity... what would we need to do to get rid of the code?
@@juliusmondejar246 Your OBD2 scanner should learn you instructions to reset the code. Try to find a manual online and follow the procedure.
@@juliusmondejar246 This is P.Dub from Fresno on my lady's Sonya's tablet ...I too had this same situation.. Mine showed continuity, but the red sensor code still remained..the thing is, just because there is continuity doesn't mean the o2 sensor is good!.. What I ended up having to do is replace the o2 sensor with a new one and the o2 red code was repaired...
Hope this helps you out...
Thanks, Chris!! My RAV threw a P1135 and I spent 6 hours today reading articles, trying to figure out the air/fuel vs. heater config in the sensor wiring and diagnose the whole circuit... and it took me less than 10 mins to watch this vid AND diagnose the faulty sensor. Really appreciate it!!
Was it the one in the far back? My p1155 is showing but I checked it and it works but there is also a p1135 b1s1.
You've got some awesome videos, Chris. Great camera work, makes it easy to see everything. You've inspired me to do a lot more of my own work on my car, and I've saved a ton of money doing it. THANK YOU!
Mitch J for real
So far he's cost me money by inspiring a tool addiction.
Jay Ti to
@@annieworroll4373 haha me too females and tools 🛠
Amazing videos chris even though my car dosent have any of these problems yet i still watch them, thanks for making these videos.
Thank you Chris! Your video saved me a ton of money by knowing how easy it is to replace this sensor. You are so great at explaining everything in a relaxed and knowledgeable way. I just had to personally say thank you.
Great camera work. Clear and concise instructions. Thank you!
Chris is genius indeed. Great explanations. I have been able to repair several parts my Toyota in Kenya by watching your videos. Especially changing parts. Thank you Thank you. Keep up with the good work and God bless.
This guy really knows how to make a video and explain things. A big fan.
Thank you I learned how to trouble shoot the 02 sensor thanks to your video keep up the good work 😎👍🏼
Chris....you do excellent work. Videos are clear, concise, and extremely accurate. Thanks for information that don't come with a "catch" at the end of the video.
Thank you Chris for all the great videos you put out. I have learned so much from your videos .
Thanks, Chris! Great video as usual...concise and clear. I'll be doing this repair on a 120K mi 2az-fe Toyota 4-cyl this week. It's throwing a P1135 code.
SharpShootist No problem! Let me know how it goes!
Excellent instructions. Much clearer than others I have watched. Just need to get one of those sockets now.
Hi
Thanks for good sound, steady video, good lighting and clear directions. So rare!
Thanks for the video. I'm now confident that I can fix my P1135, and I appreciate you telling us how to check if the part is bad.
Short and sweet.....straight to the point
Mashud Ahmed Thanks! I try to keep it simple yet informative!
Yea.
very helpful Chris. I have to change mine this week. CEL comes on and Porsche 911 diagnosed the oxygen sensor ahead of cat 46. Plus a knock sensor and a below par fuel filler shut off valve. I was quoted $1200. I bought the gear which I needed for all 3 jobs plus tools for $400. A saving of $800 as I am a DIY guy. Porsche have special very costly durametric testers for their vehicles.
Awesome man! Good luck and let me know how it goes!
followed the steps in this video for my 2001 RAV4 and was very easy to do. Thanks!
Cheers buddy, thanks for sharing the knowledge in such a brief way, specially the testing of the old sensor. Greets from the Netherlands
man that was an amazing video, thanks for helping me out i just did mine n it work's just fine
0:59 Pull out game is strong!
I replaced lambda sensor which also had heat circuit failure, as one of the wires broke, yesterday on my Nissan Almera 2003. Did it while the engine was still pretty warm, but got it easily off and did not burn mysef. The old lambda itself was quite hot, but no so hot it would burn my bare hands.
Keep up the good work with your videos! There's been plenty of helpful and money saving tips and tricks. Also as I'm going to school now to be a car mechanic here in Finland, yout tips and tricks have been very useful there too.
You make everything look so easy chris. Good work
Thank you so much Chris! I followed your clear and simple instructions and replaced the sensors my self, and saved a couple of hundreds of dollars.
Awesome! I am glad to hear it!
Many times you can tell that an O2 sensor is going bad even before your check engine light illuminates. Your gas mileage will start to get worse and worse because the sensor says that things are running lean so the ECU will add more fuel to richens up the mixture. I have a car with approximately 75K miles on it and I used to get about 300 miles +/- per tank but now it is in the low 200s. I still do not have a check engine light but should be showing up soon. I understand that you are trying to make your videos as clear as possible and try not to get into guessing games but this might be worth mentioning.
I have spent days and hours watching vids on how to test the o2 sensors and you nailed it for me buddy. And yea, my 1994 toyota sensor is a being put in the bin! Thanks a bunch.
Still the best on CZcams! You just can't beat a ChrisFix video.
Great video! I'd recommend to spray some WD-40 or PB Blaster to where the sensor threads with the engine off but still hot. It will loosen more the sensor. I had to replace this "Air/Fuel Ratio" sensor on my '05 Hyundai Elantra 3 years ago. It was around $165. I checked online on Advance Auto Parts, and found a promo code that took off $50. It was still expensive paying $115 for a air/fuel sensor, but cheaper than paying $165 + tax.
Man, can't say enough how much I love this guy..(not in a romantic way) ..He is just awesome
Exactly what I was looking for. Thank you!
Thank you so much Chris , your videos help us a lot.
Hey Chris, my name is Romario, I live in Brazil and I love to keep up their good work in the engineering and mechanics in relation to cars and other. I would ask you, if possible, for you enable subtitles in Portuguese in their videos as they do not fully understand English, for better understanding, I wish you enabled the legend in Portuguese! Thank you very much, I'll be happy to get a return to my message! God bless!
+Romario Matias You can put on Portuguese subtitles. It is enabled. The problem is the closed captions are not accurate.
ChrisFix Okay, God Bless! Thank you for answering me.
Wow, clear and to the point, great camera shot and the testing of the O2 sensor, was very clear and the selection on the amp meter to where the right setting 👌🏾👌🏾👌🏾👏🏾, must video they just tease you. thank you, sir,
You might also check the elbow grease and test the blinker fluid 😳😂😂😂😭😱😁😁😄😃😀😆🇯🇲🇨🇦👨🏾🔧.
lol thanks!
Your videos help me all the time. Thank you ChrisFix!
This helped me; thanks Chris! I was able to "bench test" an O2 sensor that I got in a second hand aftermarket exhaust header.
It helps to have the engine a little warm, the exhaust will be hot enough to make it easier to break the sensor loose. If the sensor is confirmed to be bad/dead, don't bother with the special socket to remove the bad sensor, just cut the wires and use a regular socket to remove it. But, a socket with the slot is needed to put the new sensor in. Never use dielectric grease in the connector, the O2 sensor gets reference air thru the wiring, the grease will block the air from wicking down the wires to the sensor, effectively rendering the sensor bad. The sensors have an air cavity in the body to sample outside air to use as a reference of oxygen content. The sensor uses the reference to send a signal to the pcm of the oxygen content of the exhaust. For those interested, Wells Vehicle Electronics has a video on their youtube channel that explains all about the narrow band O2 sensors. It's a long video, but it is very interesting and educational. Btw, i'm a Chrysler dealer tech.
Not only grease (i suppose we're talking about dielectric grease). Also avoid spraying electronics cleaner (or, even worse, brake cleaner, throttle body cleaner, carb cleaner...) on the connector, even the no residue one (the MAF cleaner is basically fast drying no residue electronics cleaner). It apparently gets inside the wiring and then it can't evaporate from inside there. This will make a good O2 sensor turn into a bad one too (for some reason regarding electrochemistry, it will start sending an always lean reading to the ECU) and you'll immediately need a new one... another good tip, if there are leaks/issues with pressure switches and anything in close contact with a pressurized fluid supply, replace the faulty switch or sensor soon, because the fluid leaking through the sensor/switch, be it motor oil, PS fluid, coolant, can over time travel through the engine wiring harness and foul both the ECU and the O2 sensors...
David B. Fishburn why do you think y’alls car don’t last long
Wow....is that true about the dielectric grease?!?
I was thinking about using it!!!
The wave of the 02 seems secondary to another issue in many cases. Like an EKG reveals an irregular heartbeat, the O2 sensor waveform will also reveal any underlying problems such as vacuum leaks, ignition misfire, injector imbalance and even compression losses. Each of these conditions will produce a characteristic type of hash in the sensor waveform. Anytime a cylinder misfires or leaks compression, unburned oxygen enters the exhaust. This shows up as a momentary dip in the O2 sensor's output voltage. So if the O2 sensor's waveform contains lots of little inverted spikes, it tells you the engine is misfiring or leaking compression. You can then use your other diagnostic equipment to nail down what is causing the problem. A "digital storage oscilloscope" (DSO), also known as a "dual trace scope," is unquestionably one of the most useful pieces of diagnostic equipment that is available today and prices for under 100 dollars for a basic bare bones model. This could help answer "is it cause or effect" type of questions underlying this and many other theories in the field.
I’m erratically gettin a p0171 code and it only happens in cold weather. Goes out by itself. No outward symptoms and the manifold gasket is Not leaking. Can u suggest a coarse?!
I wish I could hold you one day because you're very excellent at analyzing the problems. I love you man 🧡
Always following, Thanks Chris for all your time and effort putting all of these videos!
Thanks for the support! Glad the videos are helpful!
ChrisFix I can't wait till you post the seafoam for a car test!
Solidgoldshows 2 I cant wait either. I want to see the results!
ChrisFix Meeee tewwwww..
And i looooove your videos they are veru helpful
Glad the videos are helpful!
Chirs definitely you are the best. 👏👏
I always look Chris fix videos when I need to work on my Toyota. Videos are very helpful and easy to understand. thanks for sharing. Awesome
OH SNAP CRIS IS STILL REPLYING TO VIDEOS 5 YEARS LATER
P.s. I’m not even old enough to drive legally😏 and I just love watching your videos
This job is ridiculously easier on transverse engines! I need to replace the oxygen sensor on my Camaro but it’s behind the engine right next to the damn firewall! Can barely see any of it from above the hood! 😭
We LOVE you man.
Hats lift up.
an OSCAR should be honored to you.
God bless you.
Hey man you helped me through college during my mechanical engineering course.
Thank you
hey Chris thank you for the video gona get at in morning let u know the outcome.
Good luck!
some say Juan can still be found in his driveway changing his o2 sensor
Any updates yet?
@@chrisfix Thanks for this video.
Do you have the video for Oxygen Sensor (Bank 1 Sensor 1) that gives off the code P2238 replacement too?
it's always a freaking sensor.
Missy Ginsberg yeah whenever your buying a car on craigslist and u ask them why the check engine light is on. Theyre number #1 response is its the o2 sensor... Bullshit
Chris where is the upstream A/F sensor on my Lexus RX 300
It's not always the sensor.
We are manufacturer of oxygen sensor, nitrogen-oxygen sensor, if you have a product demand, you can contact us + 8615957779261.email: 772379228@qq.com
Good sales pitch, tianshui. Sold!
Awesome job CF.
Changing these are easy. Harder ones are the back ones, where you have to be under the car and try to figure out how to get to the sensor
Always fantastic videos, cheers CF
Hello Chris, Do you have any video how to clean catalytic converter?
Transmission fluid in brake vacuums a little at a time this will burn carb off of valves to
One tip I read is that you should do this kind of work on a cold engine (spark plugs or sensors) because metal contracts and shifts when hot. (Not saying you over tightened, just wanted to share that, also I am sure the anti-seize will prevent any issues).
Metal expands when hot!
Chris thank you most of all your time and knowledge god bless you
Great video. Easy to follow and understand. Thanks!
0:58 Good thing my pull-out game is strong.
Golden days, when you were able to work on your own car
You mean like now.
@Little Reptilian yea, that's why i keep my 96 mazda close to my heart:)
How could any one give this kris video a thumbs down ? Look how helpful that was ..
Thumb up b4 I watch the video, because i knew the ending will be awesome. Thanks chrisfix
Hello Chris, thanks for your videos..i have a question, do you need to disconnect the battery to do this job?
I would go play it safe since you’re replacing sensors. Technically you don’t have to though.
Yea
I heard you should reset the ECU by removing the fuses or battery disconnect
a trick you could use if your in a tight situation and don't have a braker or cheater bar is getting a deep socket that fits around you ratchet and extention
jovanni Gonzalez yes or you can use a large box wrench also
One of the best mechanics on youtube ❤ very informative
thanks man, best regards even from Croatia!
I changed the O2 sensor of a Suzuki Alto k10, I had to remove the exhaust manifold, it was very tight so we had to heat that sensor, then it came off
Nice work!
How much bro per sensor is it costly maintenance
I tested my o2 sensor and it reads 5.1 ohms is that a good reading
You’ve come a long way bro keep it up 👍
As always a great video with full explanation
Lol 5 years old but when my guy said “when you pull out” the slight pause was funny idk if you meant that but it’s funny
D......
Where is the heater sensor wire go to the fuse
Hey Chris I just replaced the O2 sensor in my 07 Infiniti m35 and went to start it up and the code came back with some misfires any ideas on what I can do? Thank you
You probably have a clogged catalytic converter
@@sleepyskaterzzz turned out the new o2 sensor I got was bad and caused a coil to give out, so replaced the o2 sensor and the coil now it’s all good
Thanks a lot! You have just saved my car ( and I have learned how to replace the o2 sensor) thanks to this video i knew exactly what was wrong when the car started running worse than it used to👍
good work chris i like your videos bro your very thorough detail is always best
What is the recommended range in Ohms resistance for an oxygen sensor?
Usually the resistance is quite low, given that it is an heating resistance, so usually < 15 ohm, but I guess it depends on your model. In any case the most important is not to have an open circuit.
👍🏾
Hi Chris, thank you, really good clear presentation.
as always, very well presented and easily to understand with a very likeable voice. i liked and subscribed. thanks, Chris. you are helping us ordinary people saving a lot of $$.
Should the engine be cold or hot when trying to remove the oxygen sensor? I am confused because you said make sure the exhaust manifold is cold at 0:34, but then ended up using a welder's glove because it was hot at 2:34. Thanks.
It should be cold but this was a friends car and they just got to my house and needed me to fix it fast.
+ChrisFix gotcha. thanks.
They are so lucky to be your friends. Dependable and trustworthy repair for sure! Awesome video btw
It is better to be hot is easy to take it out I know that for a fact.i tried both ways.
Marian Luc yeah easy to damage aluminum too.
When tightening an o2 sensor, do not tighten it too hard, because they expand and contract from the heat. It should come off with less effort than that. That one was a bit too tight and it could have broken making it harder to get it off
Rust, snow, or general time makes any part remover harder
Finally I found someone that knows what he is talking about. You just made my day. Thank you so much, keep the great job!
Glad the video was helpful!
THANK YOU!! This video helped me get rid of my check engine light and helped me pass the smog check!! And I saved big MULaHs!!! I even got the same multimeter and same O2 brand as yours. The only thing missing here are more details on how to complete the driving cycle so the OBD2 can read the catalictic monitor after replacing the O2 sensor. It took me a while but I found out that Toyotas require a very specific driving cycle:
first, drive at 45-55 mph for 7 minutes, then, drive at 35-45 for another 7 min. Speeds must be consistent and non-stop.
For those of us who do not pass the smog check due to Catalytic monitor "not ready" or "incomplete", this driving cycle would do the trick. It did it for my Toyota Camry CE 2000. THANK YOU AGAIN!!
How about a single wire O2 sensor.
@O R look for 0.5 volts average reading but will range from 0.1 to 0.9 volts and vary alot very quickly with time
+ChrisFix 0:58 that's what she said! LOL!!
+michael martinez What?
michael martinez no joke there what so ever
Shane Kneeshaw lmao, maybe you didn't hear him say "pull out" but that's a word alot of men mostly know lol!
michael martinez الل
Thanks for your video on this Chris. I tried cleaning my sensor in different ways & tested it but it was toast. Yesterday I got my new 02 sensor (Bank 2 Sensor 1) from Amazon for $67.39 Cdn. for my 2007 Honda Pilot. Installed it, disconnected the battery to clear the code, drove for over an hour = No Engine or VTM-4 codes. Very happy. Here's the part for anyone who needs it: Amrxuts 234-5010 5 wire wideband upstream.
Hey Chris, great job. You got almost 9 mil subscribers . Wow !! Congratulations !!
when are you going to change a bad catalytic converter?
When I get a bad cat to change.
. ....................
This thing costs maybe thousand $..You could just get it the heck out of the exhaust system and solder in a regular muffler.But you'll need to install a special thing called non fouler or check engine light will come..Without cat. the power is increased and no boiled eggs smell no more.
Matthew Livingston a
Petar st Saw in the news some dude purchased a van that had the catalytic conv removed. His son died in the back seat due to carbon monoxide. Does that special muffler you're speaking of get rid of that issue?
Chris: A special socket is used to remove oxygen sensors
Me: What if I take a socket of same size and make a slot in it?
You could do that, but a special socket exists so you don't have to do that. Pretty simple really.
Thanks for posting. This is a good informative video. A thumbs up. cheers !
Watching ur videos...im from the phillipines!! I love ur videos! There so helpful...godbless!
I never pull out. hahahahaha
+Tj Semeniuk shut up bitch
That's because you never get it in. (ha ha ha)
I was always told that the downstream sensor does not affect fuel trims or mileage and that is Not true! The first purpose of the downstream 02 sensor is to measure cat efficiency. The second function is downstream fuel control. This function adjusts the upstream 02 goal voltage within the range of operation of the upstream sensor. The upstream goal voltage is used to ensure long cat life by allowing the PCM to control the amount of air and fuel that is supplied to the cat. If the downstream 02 sensor switch point is at a low voltage the PCM will adjust the upstream 02 goal voltage to reduce high 02 content by . If the downstream 02 sensor switch points stays high, the upstream 02 sensor goal voltage will change and allow a low 02 content.
My fuel trims were in the negative 25 percent until I change my fixed rich downstream sensor.
Metal Maniac Thanks for sharing!
This was my first car repair EVER, back in 1988 on a 1982 Chevy Citation. I had to borrow ALL the tools and such, but being broke is a powerful motivator.
This man is a father figure to many. Chris is the man🤙
Q. How do you know that is "bank2/sensor1".
My same question
This man 10 mins of driving and your gas stays the Same place ??
its a toyota, not a v8 american muscle car where the gas needle dips every time you hit the gas.
Good advice on testing the sensor.
Because of expansion with hot metal I would definitely let the engine cool completely.
Chris, I'm now addicted to you videos. I have a 99 Ranger. It's in need of quite a bit of work including oxygen sensors. Will you make a video of this on your Ford 95 Windstar, please? THANKS!