Toyota AFR / 02 Sensor Problems

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  • Опубліковано 20 січ 2015
  • This video is a little different that the normal ones I do. In this one I have a '02 Rav4 brought in that has already had a lot of fingers in it and the primary problem is the fact that it won't run a drive cycle. I do a live diagnostic test to see what is wrong. I test an AFR Sensor that I suspected was bad during an earlier test drive. Watch the video for the rest of the details! Thanks for watching and subscribing!
    Buy your AFR From here. There are many different ones so fill out the form and they will get back to you trust me. Greta place to get Yota parts :)
    Get AFR's Here: www.toyotapart.com/mm5/merchan...
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КОМЕНТАРІ • 440

  • @upallnight888
    @upallnight888 5 років тому +8

    A bad teacher is one who can't impart knowledge to his or her students. A good teacher is one that can explain a problem and a solution to the problem. In this video, I would rate you as a GREAT teacher.

  • @faustogonzalez8397
    @faustogonzalez8397 2 роки тому +14

    Eric, my understating is that when you're reading an AFR signal in OBD II mode, you get 1/5 the value of the AFR reading in Enhanced MODE. Therefore, if the Enhance mode reading of the AFR sensor is 3.3 Volts, in OBD II mode you will read the AFR Voltage as 0.666 V which equals 3.3v/5v = 0.66 Volts, in addition during acceleration in OBD II mode, the AFR signal in OBD II value will display about 0.5 V, which equals a AFR Voltage (enhanced mode) of 2.5 V (equals rich mixture); therefore 2.5 V/5V = 0.5 Volts. Also, as you mentioned, further testing and confirming the AFR sensor is operating correctly, you could remove the harness side connector of the AFR sensor, put the probes of a VOM or a Scope between the two signal wires of the AFR sensor (while AFR sensor is still in exhaust pipe) , jump the two heater wires from the disconnected Harness connector to the heater wires on the AFR sensor heater wires ( helps keep the AFR sensor at optimum Temp while conducting this test) , you will get an Analog signal ranging from about 0.8 V to about 0.2 V just like a Narrow Band O2 sensor. This confirms the correct operation of the AFR sensor if you do not have the ability to Read Enhanced mode data. Thanks for the great video!!! What Amazes me is how is it an ASE Certified Toyota Dealership Tech could not identify and confirm a faulty operation of this AFR sensor, Amazing !!!!!!!!!!

  • @ComicalCowboy1911
    @ComicalCowboy1911 5 років тому +9

    Finally I found a video showing what these stupid widebands should look like and read on a scan tool! I swear this is the only video on UA-cam that actually shows it! Thank you so much! I'm in the middle of diagnosing a 5 wire sensor on a buddy's car and now I can be confident that it's faulty and needs replacing! Thanks a lot again sir! Great video!

  • @mikemuzzell5167
    @mikemuzzell5167 5 років тому +9

    As a apprentice I’ve learned the ppl that say they cant teach are usually the brightest teachers 👨‍🏫 I enjoyed the diag. Thanks Eric.

  • @corvettebob96
    @corvettebob96 2 роки тому +2

    Just found this gem after watching 100s of newer videos. I understood everything you were explaining and enjoy your in depth analysis. I have no clue if I will ever use it in my lifetime....

  • @michaelstoltz58
    @michaelstoltz58 3 роки тому +2

    I've been watching these videos for years. Sometimes they are too in depth, and sometimes off the point. Since I've postponed buying for a 2003 Toyota with the 2.4 engine until I was sure I needed a sensor. Your video came at the right time. Since you stayed on topic it was easier to understand. Thank you.

  • @baxrok2.
    @baxrok2. 7 років тому +4

    I watched this two years ago and just watched it again after viewing the Wells presentation. Well done sir!

  • @yhird
    @yhird 4 роки тому +4

    You're not a good teacher?!?! Nothing could be farther from the truth. You are hands down the best diagnostician/technician/mechanic I've seen, and I have seen quite a few. You do a great job transferring knowledge to those of us out here who are interested in learning. Thank you Eric.

  • @steadyeddie7453
    @steadyeddie7453 4 роки тому +3

    Wow, you nailed it. Your voice even perked up when you figured it out. I commend you on your methodical troubleshooting. Finding an incorrect part installed by someone else can be a troubleshooting nightmare.
    Also, you can use a 1lb propane cylinder with a std torch head to richen up the engine. Squeeze a length of hose on the torch end and put the free end in the air intake. Just crack the valve open and dont ignite the torch. You can fine tune how much added "fuel" you want to send into the engine. Great video, thanks.

  • @caiobabe
    @caiobabe 4 роки тому +2

    I learned so much from your video. Most importantly...The front sensor is NOT an O2 sensor but a air/fuel ratio sensor!!! I was about to change this sensor on my buddy's 03 Tundra as my scan tool gave me flat line readings and not a sine wave. Turns out, this is normal. You saved my friend $180 because that is what the Denso part cost. Took me half dozen YT vids to find the one that gave me the right answer and that was this video. Thank you!

  • @adamtrombino106
    @adamtrombino106 6 років тому

    I know this is an old vid, BUT, thx for posting this! I had a 98 Corolla 1.8 that would not do a complete drive cycle as well, with everything but the 02 monitor and cat monitor not run.. It did run an evap monitor and passed that. Now, I could've sneaked it through with 2 monitors not being set, but I was looking at the customer's past 3 yrs of emissions tests, and found that each time, neither the o2 nor the cat monitor had passed. Based off of what I learned from your posting, I found the car had 2 bad AFR sensors. The pre cat was bouncing around like an O2 sensor, and the post cat was flat lined at 0v, no matter what. No codes, no pending codes. Heater tests passed. After installing the proper AFRs, their monitors ran right away. Before this, the car was running long term fuels of +6%, short term 0. After the repair, the car was -6 and +6, so 0%. Miraculously, the cat passed! Thx to your vid, I got the O2 sensor logic out of my head, and the AFR sensors' proper function in my skull instead! 2 other shops had fixed various evap related problems, but missed the AFR problems. So thanks again! You da man! :) ( Note, I got the car because the customer was also complaining of decreased fuel mileage. We shall see if that problem is fixed )

  • @teresarodriguez8145
    @teresarodriguez8145 9 років тому +2

    This guy does good work man. Attention to detail is always the key.

  • @kellyr9388
    @kellyr9388 5 років тому +2

    Great share Eric, great fix and keep up the techie vids. I love sharing opinions and testing methods with other bright individuals.

  • @kendogz161
    @kendogz161 Рік тому +1

    These early videos man 😂. Good to see how you have grown as a content maker. How much I love the “Welcome to South Main Auto” on the newer videos.

  • @mk88200
    @mk88200 3 роки тому +32

    I'm currently working through your videos in order. This is the first "if I can do it you can do it" (albeit a slightly different variation) it is so cool to see your progression from stiff (and slightly awkward, I mean professional 😂) to a relaxed, funny, showing your true talent as a professional. Great work Eric, love your videos.

    • @aussiebloke609
      @aussiebloke609 Рік тому

      I'm just glad the "Doctor O" moniker was dropped quickly. I'm sure it seemed like a good idea in the beginning, but that would have quickly become cringy. 🙂

  • @grizzlydan8
    @grizzlydan8 9 років тому +10

    This is the stuff I need to see the most. I have one foot in the present and the other in 1969 (when I first got a job at a Chevy dealership). I would like to keep up enough to be able to continue doing most of my own work. Chevys from the '50 s and '60 s were a dream to work on and had a ton of interchangeable parts between small blocks. A starter would fit all the small blocks and the 6 cyl.

    • @SouthMainAuto
      @SouthMainAuto  9 років тому +4

      dan andy Oh man those days are long gone, seems if you need a starter for a late model GM there is 10 options for each engine haha

  • @jorgey6801
    @jorgey6801 4 роки тому +5

    If you were local to my area, you would be my preferred premium mechanic...just this one video you demonstrated your aptitude & attitude and pride you take in knowing how to diagnose, troubleshoot and resolve issues. You’re one in a few worth their weight in gold. Thank you for sharing.

    • @erollricketts47
      @erollricketts47 3 місяці тому

      You are so right about that teacher Erick

  • @cornwasher
    @cornwasher 3 роки тому +2

    Really enjoy the analytics Eric. Makes the gray matter work a little harder to stay with you. Good job on this video.....

  • @thomasstreetman8066
    @thomasstreetman8066 2 роки тому +3

    Well, you did it again! You seem to have found the problem. It's maddening how many shops throw parts at the problem and you end up paying for not repairing an issue properly. You are a rare thing Eric.

  • @carriethompson84
    @carriethompson84 5 років тому +3

    I agree with the last comment, you did a great job on this video and you're not a bad teacher at all! Sometimes I can be a bad listener especially when I'm listening to these videos in my car over Bluetooth but other than that, you're actually a better teacher than you think. I don't know anything about the computer in the scan tool that you were using because I think that's something automotive shops mostly invest in but overall, great video! I'm looking how to not only locate but how to repair a bank 2 sensor, O2 sensor on a 2005 Lexus ES330 I'm having trouble finding one for what specific year, make and model. I don't think the catalytic converter has gone bad yet because it doesn't stop at a certain speed, it's not overheating but it is idling rough at this point, the check engine light came on after I ran out of gas on the highway so the test at AutoZone came back as Bank 1, bank 2, O2 sensor or code P 0420, 0430 which is the bank 1 and bank 2, O2 sensor and they said it was most likely the downstream or bank 2 sensor so I'd like to try to do it myself so that I can save money. The part at AutoZone is around $50 and I have a good family mechanic and now I'm thinking, I should probably just take it to him because you've got me wondering if it could be the air fuel ratio sensor, the one that looks exactly like the O2 sensor but is in fact different which I've heard in several videos and they all say, don't let the auto parts store argue with you, just let them look stupid because they are two different parts and they have two totally different functions. If you do know anything about a 2005 Lexus ES330 and where the bank 2 sensor is located, please please let me know, I will be forever grateful. I watched one video and the guy had to take out his center console and his driver seat in order to get to his bank 2 sensor and if I have to do all that, that's fine if it will save me some money. Common Sense goes a long way and I'm very blessed to have a lot of that LOL, not so many people have that anymore these days LOL. Thanks again for the great video, I've been learning so much from watching these videos, I think it's important to know as much as you can about your vehicle

  • @denverbevins4052
    @denverbevins4052 3 роки тому +2

    I have an 02 Camry & you just taught me where I screwed up. Thanks. Had no idea there was any difference between the up & downstream sensors.

  • @tankabbot22
    @tankabbot22 7 років тому +3

    Awesome video Eric! Find the evidence and fix the problem. We're constantly learning in this field.

  • @dennisjones1961able
    @dennisjones1961able 5 років тому +2

    informative video Eric i didn't realise there were many types of o2 sensors.
    love watching your videos ,
    keep them coming mate

  • @frugalprepper
    @frugalprepper 2 роки тому

    Great video Eric, 3 years later I am reviewing it because I have to go diag a Yota AFR tonight!

  • @jimandnena4
    @jimandnena4 6 днів тому

    I watched this looking for O2 answers. I watch the channel every day and learn something new. Thank you for all the solutions. jim

  • @jamesdelb6885
    @jamesdelb6885 2 роки тому

    2006 Toyota Camry. Drive cycle wouldn't complete 3 months. Changed the Air Fuel Regulator in the CAT. bingo, one code cleared on the drive home. You're brilliant, and don't sell yourself short; you're a great teacher..

  • @lawsonthursfield6950
    @lawsonthursfield6950 5 років тому +2

    Awesome video...
    Great conclusion at the end . Also very informative regarding test and measurements with lean and rich testing sensors in data pids 👍

  • @DependableAutoTruck
    @DependableAutoTruck Рік тому +1

    i have been struggling with those just found this video helps a lot

  • @johnschuler3269
    @johnschuler3269 3 роки тому +2

    Well Done! Love it. As a EE, I am most impressed with your knowledge and actions. Plus you do a fine job of SHOWING and EXPLAINING things! On my own 2003 Lexus RX300, I had a code for B2 S1 AFR. $125 for a Denso. Change other one, Plus O2 $50 for Denso for preventive maint.

  • @gregcobert1614
    @gregcobert1614 4 роки тому +3

    Thank you Eric you really helped me to understand these sensors. You rock!

  • @jasonbiers
    @jasonbiers Рік тому +1

    Thanks for this video. After watching this video, I understood how the sensors worked and was able to fix my problem.

  • @MrBinmonkeys
    @MrBinmonkeys 5 років тому +2

    Just watching this one for the first time today and yes you are a good teacher! Also pretty crazy that this 4 cylinder engine has 4 AFR/O2 sensors.

  • @richardg9719
    @richardg9719 Рік тому

    2001 or 2002 Honda Insight CVT
    CHECK ENGINE LIGHT ON
    Scan tool list bank 1 O2 heater circuit
    quick look at connector, looks ok.
    Next look at heater signal from ECU and it's delivering voltage to the sensor.
    Next check at sensor for complete heater circuit ...ahh open circuit.
    The sensor was an A/F ratio sensor, and oh Momma ! the price was many times more than an O2 sensor...and they do look alike.
    I'm lucky that I only had a burnt out heater in the sensor ,it was a quick diagnosis.
    The new A/F Ratio sensor was the fix, and has been going steady ever since !
    I want to Thank You for all the time and effort you dedicate to the videos you make. It's sharing the information that makes you the best kind of teacher !
    I've worked next to folk who won't share info for fear that I might be a threat to their position or job. That's a tough row to hoe !!
    I believe we are,. our brothers keepers and to pass on knowledge and educate those new upcoming co workers.
    I send good thoughts to you and your family !! I hope you have a great Holiday Family Gathering !

  • @TIMINGBELTS
    @TIMINGBELTS 3 роки тому +1

    You are a great teacher . i learn more from you than others. Thanks!!!!

  • @mike-yp1uk
    @mike-yp1uk Рік тому +2

    Second view on this video and on a snap throttle the new one has much better numbers. The min- max can be cleared to capture the test results by clearing them before the snap. I love this video because it shows the difference that half of a volt makes and why learning the characteristic views of a known good af is so important. These differences stand out but if you only have a one bank engine you wouldn't know. Capture a min- max on different cars and you will learn different manufacturers known goods. Great video.

  • @tedm9865
    @tedm9865 5 років тому +1

    I really enjoyed that! Thanks for sharing. Currently chasing down an AFR sensor on my 4Runner.

  • @JohnDoe-ck3pr
    @JohnDoe-ck3pr 5 років тому +1

    Slick! Definitely food for thought next time I've got wacky crap happening. Thanks for the video I love your channel!

  • @tgarcia1961
    @tgarcia1961 4 роки тому +2

    Great job troubleshooting...
    Enjoyed the whole process, logical thinking. Thank you.

  • @time-capsule7
    @time-capsule7 5 років тому +2

    Sometimes I feel good at diagnosing issues, but I hope one day I can get this good at doing so. Great Video!

  • @Roboticdoughbull3k
    @Roboticdoughbull3k 4 роки тому

    5year ago info but was all learning for me today, lol. Very helpful thank you!

  • @tedenderpalmer6550
    @tedenderpalmer6550 6 років тому +3

    Great lesson Eric O, I have a much better understanding how an AFR works. Thanks much!

  • @juanpendon7482
    @juanpendon7482 8 років тому +2

    Great!!! I'm very thankful for everything you had done which was very helpful to us learning more on this educational and tutorial aspect . I'm one of your admirer watching the vedios. God bless and take care.

  • @faustogonzalez8397
    @faustogonzalez8397 2 роки тому +2

    Great video Eric, amazing how toyota factory trained technicians replaced computers and other parts and didn't think to monitor the AF sensors. In addition during check mode you can confirm the sequence of sensors checked and that need to pass to complete the drive cycle. Amazes me Toyota techs aren't aware to perform this procedure. Eric what is it you think lacks in training their Techs ? Some dealerships go the extra effort for more tech training and some do not ?? Really, unbelievable. Thanks again great video.

  • @ChristinaK1024
    @ChristinaK1024 9 років тому +18

    I am enamored by your videos. I hung around my dad fixing just our family's cars growing up and am not afraid to get my hands dirty. I do my own brakes when needed but your videos have definitely shown me I shouldn't attempt my corollas wheel bearings if I ever have to do that. You're a great teacher, contrary to what you say. Your customers must love you and if wasn't 1000 miles away I'd totally bring my cars to you. Keep on doing the great work. What did auto shops work on before emissions controls? It seems like half if your jobs are emissions related.

    • @SouthMainAuto
      @SouthMainAuto  9 років тому +3

      Christina Kendrick Hey that's pretty cool! Glad you enjoy the videos :) Well the emissions is a love hate really. It is a about a 50 / 50 as far as mechanical vs emission related repairs. NY is tough on the whole check engine light deal so people are forced by the state to fix their cars.

    • @ChristinaK1024
      @ChristinaK1024 9 років тому +5

      South Main Auto Repair In Illinois only the populated counties have emissions tests (calling it a test is stupid because if the check engine light isn't on, YOU PASS) and only after the car is like 5 years old and then every other year I think. No vehicle inspections here, although we could definitely use them, I see people riding around in literal pieces of garbage all the time. One girl sticks in my head - she was in a RSX and one of the 5 spoke aluminum wheels had significant damage where one of the spokes was even broke and you could see the car wobbling down the road. That's totally safe I'm sure!

    • @SouthMainAuto
      @SouthMainAuto  9 років тому +4

      Christina Kendrick Lol that sounds scary. We have pretty stick laws here on safety and emissions inspections (once a year) but like anything, give people rule and they will find ways around it. There are plenty of lickem and stickem shops around so we see our fair deal of garbage driving up and down the road too.

  • @harylie
    @harylie 4 роки тому +1

    You the man!!!
    Love your channel.
    I've learned soo much from you.
    Thank you soo much.

  • @ericcorse
    @ericcorse 8 років тому +17

    Great info and I'm sure much appreciated. BTW You are not a bad teacher.

  • @djwilson48625
    @djwilson48625 10 місяців тому

    I didnt know my 2013 f150 5.0l used AFR on the upstreams.
    Very thankful for this video, as with all your videos.

  • @scottmcintosh2988
    @scottmcintosh2988 2 роки тому

    Really learned a lot liked the video give me more please Professor Eric O. !!!! Great video !!!!

  • @stanwardoshiro
    @stanwardoshiro 3 роки тому +2

    That’s an awesome repair! Thank you for teaching us.

  • @saugattripathisite
    @saugattripathisite Рік тому

    I have been having P0138 code meaning high voltage on bank 1 sensor 2 on my toyota corolla. I have literally checked everything I could on the electrical signals ( i have masters in elecrical and computer engineering so I do know what I am doing). Finally changed my o2 sensor but i have been having the same code back and again. And I also checked the graphical reading of the afr sensor and it is showing the exact curve as yours and I think I have found the actual culprit. As the afr sensor is responsible for the actual air fuel mixture and being faulty it has caused the system to run lean. This in turn is causing the error code. I will replace my afr sensor and hopefully it works. Thanks for the actual diagnostic video.

  • @Younggs11
    @Younggs11 8 років тому +4

    Thanks, Eric! Have an 08 Tacoma that sets CEL on acceleration over 3k rpm only. Takes several drive cycles to clear it. Went after O2 sensor then Toyota dealer was asked why only on heavy acceleration and they said AFR. If there are two as it seems this RAV did, I need to determine which one as you did. Thanks, again!

  • @hardluck7769
    @hardluck7769 4 місяці тому

    NICE Info !!
    I Learned Valuable Info.
    I appreciate your time and knowledge.
    Thank You !! 👍💯

  • @coycarlson4979
    @coycarlson4979 2 роки тому +4

    So - after watching this awesome demonstration of your diagnostic abilities - one has to ask why the engineers would not engineer a completely different connector so there is no mistake made as to installing an O2 sensor in place of a AFR sensor. GREAT DEMONSTRATION 👍👍. We know that at least one reason engineers design for an AFR sensor - instead do an O2 sensor - IT MAKES THEM MORE MONEY - a better mouse trap ?

  • @RadialPen6262
    @RadialPen6262 4 роки тому +1

    awesome video.... never occurred to me until you mentioned was to consider in what order the monitors set. gives a direction as far as a diagnosis when no codes are present and monitors not setting

  • @philipd7749
    @philipd7749 6 років тому

    Thank you friend this was a lot of good information. Helped me diagnose a voltage problem. SENSEI LEVEL: MASTER

  • @steveguest8028
    @steveguest8028 3 роки тому +1

    Great video Eric very well explained thank you 👍

  • @mbarry9737
    @mbarry9737 7 років тому

    That's a good one, thanks for the detail, Eric.

  • @ecwurban
    @ecwurban 6 років тому +32

    Hey. I know it's an old video. I'm sure you've heard this by now or many people have commented on it but in the video you said you weren't really sure why they went with widebands over standard narrowbands.
    Basically a narrowband only knows if it's above or below stoich. It doesn't know by how much. That's why it's switching from rich to lean. It doesn't know where stoich is. It has to guess. If it becomes far outside of stoich then it'll ratchet up the short term fuel trims in increments until it gets on the other side of stoich. Then keep switching back and forth to keep as close to stoich as possible.
    A wideband, on the other hand, KNOWS how far out of stoich it is. So instead of switching back and forth to keep as close to stoich as possible it can do near immediate fuel corrections to keep it at stoich. That's why a wideband data signal will stay flat. Likewise, if it's far outside of stoich it won't have to ratchet the fuel trims to figure out where stoich is. They can do a one shot adjustment.
    All this means less emissions and less the manufactures have to pay in emission taxes. The number one thing driving vehicle complexity!
    Great video as always!

    • @WCSPete1
      @WCSPete1 5 років тому +3

      Great explanation.

    • @hustlerforgita7538
      @hustlerforgita7538 4 роки тому +1

      Now I know why 😜

    • @hustlerforgita7538
      @hustlerforgita7538 4 роки тому +1

      There always a logic to this madness

    • @derekdlick2516
      @derekdlick2516 4 роки тому +1

      Pretty much true. In my honda training they basically said they don't do anything. It was about basically snake oil like air injection. Afr sensors are accurate.

    • @steadyeddie7453
      @steadyeddie7453 4 роки тому +3

      So please correct me if my analogy is wrong. Wideband vs narrowband is like a camera lens. The narrow lens sees a narrow viewing angle, while the wide lens sees a wide viewing angle. So the wideband AFR sensor can "see" the ratio getting out of range and then makes tiny adjustments. The narrowband has to wait until the ratio is way off, then has to make bigger adjustments. Correct? What I am wondering is if bank 1 and bank 2 sensors are interchangable? Could be a good way to diagnose one going bad.

  • @Geekdiymechanic
    @Geekdiymechanic 9 років тому +3

    For me, if I only had one a/f, I might not have known there was an issue with the a/r sensor. It did change state but not as much as the working a/r. So that sort of concerns me in that how would a DIY know it was bad.
    In addition, when we were looking at the two sensors side by side, it wasn't super apparent to me that they were different since the scales did not match. But, I did notice what you observed in that the bad sensor wasn't as stable.
    Thanks for the video.

  • @lobilobi11
    @lobilobi11 5 місяців тому

    This was a very useful teaching moment. Thanks

  • @vanislandsteve
    @vanislandsteve 8 місяців тому

    Great video Eric

  • @contagiousFX
    @contagiousFX 9 років тому +2

    Glad I'd found this channel! Please post more videos :)

    • @SouthMainAuto
      @SouthMainAuto  9 років тому +2

      They'll be heading your way each week and sometimes daily!

  • @dustingreen6210
    @dustingreen6210 2 роки тому

    Great video!!!! Excellent teacher👍

  • @marcocruz6462
    @marcocruz6462 Рік тому

    One of your best videos ❤❤❤

  • @danielerevia6225
    @danielerevia6225 5 років тому

    Old video but had one these come in today! This video helped alot

  • @drvnucrzy
    @drvnucrzy 8 років тому +4

    I know I watched a video of the 3 steps to fixing something on Ave's channel and one of them is don't trust the last mechanics word. I couldn't tell you how true that is! great vid eric!

    • @SouthMainAuto
      @SouthMainAuto  8 років тому +1

      +drvnucrzy Haha so true!

    • @tracyyang1
      @tracyyang1 7 років тому

      01 Toyota Tacoma p1135 code

    • @johnathancommodore9642
      @johnathancommodore9642 6 років тому +1

      Good day mr i have a 4x4 2000 toyota tundra v6 5vz-fe.The mileage is high but woked fine until one morning it started idling low puffs black smoke all plugs keep fouling bad smell in exhaust jurking when mild accelerating and cut off twice one time different days.No check engine light and no hard starting.Please help i live in the caribbean thanks and take care.

  • @watajob
    @watajob 7 років тому +1

    Hot tip, (pun intended): An "ove glove" is very useful in these situations. And, as usual, an amazing bit of investigatory prowess. Bravo! :)

  • @ricardiagnostics
    @ricardiagnostics 4 роки тому

    I know is old the video Eric but mam, jaw dropping with it well done 👍 mate

  • @acrittendoncrittendon4143
    @acrittendoncrittendon4143 8 років тому +6

    It's ok to get out of the comfort zone you did good very good of explaining o2 an AFR sensor I'll use this when I come across one thanks SMA

    • @SouthMainAuto
      @SouthMainAuto  8 років тому +4

      +Acrittendon Crittendon Thanks, I try my best :)

  • @jakevalera1339
    @jakevalera1339 5 років тому +1

    The use of AFR was Toyota's attempt to bring the points up of the Smog rating on the EPA's green vehicle list. It's wider range provides a more instantaneous corrective response to the load changes on the engine. They started to use it back in 1997 on the California released models.

  • @mike-yp1uk
    @mike-yp1uk Рік тому

    Great video. The humble hero saves the day. What ever happened to Mrs O fixing cars? Lmao. I remember Eric taking us on a field trip once to the junkyard and to Ivan's garage. Lol just another great video

  • @aaronsanchez2646
    @aaronsanchez2646 3 роки тому

    Love the video thanks for the advice....i just ordered the correct air fuel ratio o2 sensors they are pricey but im getting the right ones hopefully my 01 rav will act right now

  • @leroykubacki1
    @leroykubacki1 7 років тому +4

    You have a future in the classroom. You should go teach at a trade school. I have learned a lot just by watch you. There a lot of stuff they don't teach in tech school or just give you the basic. You have help me learn the rest. Thanks

  • @meccanic
    @meccanic 7 років тому +3

    Awesome Video!! One test you could also do is a key on engine off and see if both AFR sensors voltages on scan tool are the same. Just because nothing is going through exhaust and should be at 3.3 or very very close.. Also just note that scan data is the only way to see that voltage change. If you lab scope voltage at connector connected to AFR sensor that the voltage will not change like it does on scanner. Scanner gets its information from the pcm which looks at the amperage and changes that to a voltage on the scan tool. Some even changed it to a normal looking O2 voltage to be easier for the tech.. Thank you for the video I think you're an awesome teacher.

    • @Franklinveterinarycenter1of4
      @Franklinveterinarycenter1of4 10 місяців тому

      the sensor has to reach operating temperature 1200 to 1500 F before you can start the rich / lean test to assess the performance of the A/F R sensor.

  • @stevenfuchs2548
    @stevenfuchs2548 5 років тому

    Woow Eric, fanfreaking tastic!!! I have a friends 02 rav and its showing the drivability code blinking so i would surmise that it is the same sensor. There are two right there the one on the left you pulled and then there is one on the right. are they both A/fs? great videos, and from a street smart, or should I say garage smart man. Love watching and listening to you, you are hands down #1!!!!!

  • @Sandbag1300
    @Sandbag1300 6 років тому +1

    Thank you for this video. Going to perform these lean/rich tests on my 96,000 mile 2005 V6 Toyota Camry a/f sensors tomorrow. I suspect one of my a/f sensors is lazy since my idle is slightly bouncing.

  • @bob2906
    @bob2906 3 роки тому +1

    I liked to learn about problems and you explained in perfectly nice video..

  • @andrewwilson8317
    @andrewwilson8317 6 років тому +1

    Great video. I think Pico has got some information about air fuel ratio sensors in database and some sample specimen traces? Good to upload traces of good and bad components for the information and learning database. Never ceases to amaze me they do this for free. I know their kit ain't cheap but so worth it for what buying in to.

  • @sinegra30
    @sinegra30 6 років тому +4

    This Rav 4 did not set up a DTC code because for the ECU to generate a code it on the AFR system it needs a steady rich or lean condtion failure present for at least 5 seconds but because you had a O2 sensor oscilating between rich and lean in less than that the PCM never set it up. Thank you for your videos.

  • @johnzore
    @johnzore 7 років тому +1

    great teacher.. thanks af sensors are my enigma.. learning though thanks again

  • @franciscovargas8396
    @franciscovargas8396 3 роки тому

    i ve heard about lambda sensors wide band narrow band you never mentioned any of that
    easy to understand i loved your video
    greetings from Mexico.

  • @leonardodavinci303
    @leonardodavinci303 4 роки тому

    Excellent, clear teaching.

  • @stationaryenginesworldwide
    @stationaryenginesworldwide 7 років тому +1

    Well done like it when you actually teach the process thank you

  • @ganeshnarayan5505
    @ganeshnarayan5505 Рік тому

    Mr o you Rock i was looking for this information on a 2000 Camry thanks a lot.

  • @paulfiebke3909
    @paulfiebke3909 Рік тому

    Loved it keep up the good work

  • @lawrencehalpin6611
    @lawrencehalpin6611 22 дні тому

    Thank you for the great lesson.

  • @tomthatcher3444
    @tomthatcher3444 5 місяців тому

    Excellent video, thanks

  • @stevieboi61
    @stevieboi61 2 роки тому

    thankyou for sharing your expertise.

  • @lazlaz8586
    @lazlaz8586 2 місяці тому

    Did the vehicle complete the drive cycle after this???
    You've been a wealth of knowledge. Thanks for the videos

  • @chevyo
    @chevyo 3 роки тому

    Thank you, excellent teaching. 👍

  • @TheSpicerider125
    @TheSpicerider125 9 років тому

    Great Work man. Thanks for the video was very educational. I have a Toyota Ipsum which basically the same as the Rav 4 3sfe.

  • @sjn7220
    @sjn7220 9 років тому +2

    Nice video. I noticed the y-axis' were different on your scanner for the two sensors especially before you replaced the sensor. B2-S1 was in a very narrow range (3.03 - 3.47) which would magnify any changes while B1-S1 was in a broad range (2 - 4.15) - this would compress the peaks and valleys and make it look more steady. It would be easier to compare them if they were in the same range, not sure if the software can do that.
    Very informative. When my 02 Camry was throwing an O2/AFR code it took me quite a while to figure out the difference between the two and if there really was one. Replaced the upstream AFR sensor and it still threw a code, replaced the downstream O2 and so far so go 2 years later.

    • @SouthMainAuto
      @SouthMainAuto  9 років тому +2

      That's a good observation. Most people would not have picked up on that. If I was watching that on the lab scope as opposed to just scan tool data I could have set my min and max Vdc on the y-axis. However when you graph data on the scan tool it sets its own min and max based on what it captures, so all I can do is force it rich then lean and it is what it is at that point as far as low and peak values, but this could trick some one for sure. That is one reason I tell people to look at the numbers not just the picture ;) As I mentioned in the video this is the best way to test AFR's. I would have loved to show the data on a lab scope but they are tricky to do like that. I really just wanted to fix it lol. Going to see if it will run a drive cycle today, got my fingers crossed!

  • @embreesmith7613
    @embreesmith7613 7 років тому

    great video..!!
    thanks, Eric

  • @mrk_u1352
    @mrk_u1352 6 років тому

    Great info and great job.

  • @michaelstoltz58
    @michaelstoltz58 3 роки тому +2

    You taught me. I did all this to my car today, and the AF sensor failed. Had a 1.0 on the ohms for the heater circuit. Did some research and discovered that someone installed a narrow band sensor. Close but no cigar. Explains a lot of issues and the Engine OFF volts jumping up and down. California cars require a Wideband sensor.

  • @carlodonnell146
    @carlodonnell146 Рік тому +1

    A regular o2S indicates only rich or lean, but an AFR sens. indicates HOW RICH or HOW LEAN, that's why the AFR sensor is more accurate, that's what I ahve been learning about them, Eric O

  • @issjoe3
    @issjoe3 7 років тому

    Another great video. Best video on AFR and old style O2 senor on the web.

    • @warrenaldridge1511
      @warrenaldridge1511 7 років тому

      Steve S I've got a 96 Subaru, the check engine light stays on all the time. what can I do about it. please help if you possibly can, thank you

    • @issjoe3
      @issjoe3 7 років тому

      A 1996 Subaru should have obd2 port. You need to read the codes to see what triggered the check engine light. What triggers the code might not mean a certain component is bad.

    • @warrenaldridge1511
      @warrenaldridge1511 7 років тому +1

      Well first of all thanks for getting back to me.but I have been able to turn out my check engine light output,by connecting my down stream 02sensor back up.some one stole both converts off my car of which isn't good for now.but again thank you very much for your email.your friend Warren Aldridge

  • @Freetheworldnow
    @Freetheworldnow 6 років тому +4

    Great lesson! I hope the Toyota dealer in question has watched your video. They must feel cheep now! And they must be ashamed of themselves for not fixing correctly one of their own...
    God Bless.
    Thanks for posting.

    • @chriscorts3337
      @chriscorts3337 4 роки тому +1

      The worst techs I worked with were at dealers. Flat rate makes them even worse.

  • @jaykent6645
    @jaykent6645 3 роки тому +1

    Hi Erico, love your videos and am a massive fan, im a bit confused regarding the A/F Sensor heater test you did, when you probed the circuit it showed zero Ohm's shouldn't the heater circuit on the sensor show resistance if the heater is good?
    Thanks in advance regards Jay🤗

  • @lp.670
    @lp.670 5 років тому

    Sir you are king you have help me so much just watching your 27 minutes video were I have spend hours watching other video's 👍and a subscribers ty sir