So I shot this video, edited it for a few hours than realized I misspelled signal on the whiteboard hahah wt..

Good stuff, writing this down for future use. Find the sensor heater and ground with an ohmmeter. On the harness find the heater hot with a test light. Find the harness permanent ground with a test light, it is used by the signal output. Then find the harness switched ground by turning on the engine power and a test light. The remaining harness wire is signal.

I love the fact that you explain everything so well , you get to the point in a timely fashion, you don't have horrible music , I can hear you perfectly ... thank you for making quality videos that I can use an don't have to skip thru half of it ... thanks again

Bro you make the most informative and accurate car repair videos on the tube.

As a mechanic myself, I could not of said/shown it any better than that. Great video.

Another perfect, easy listening vid. I wish you had more time to do these, you're the perfect informed moderator.

Excellent description and explanation. Straight to the point without any fluff. Great video

His patience and calm demeanor is awesome

Bro thanks for the info, I’ve learned so much in just 1 video of yours and I got my car to pass smog test that Mercedes tried to charge me an arm and a leg to fix the issue.

Thanks man you are doing a service for society. I've never called b.s. on any of your stuff

OMG! - after me pleading with you to do this for 4 years, you finally got a Patreon account!

Dude, you make such great use of that testing light and multi-meter. I love the way you seem to be able to troubleshoot any electrical problem. You’re very impressive. I don’t have an immediate need for any of this knowledge, but I love watching a wiz at work so I enjoy your videos. You’re expertise is inspiring and you have a real knack for explaining these concepts so they are understandable even to a layman. Keep up the great work.

Thanks for great tutorial on oxygen sensor function and wiring, and identifying those wires.

Who needs Scotty Kilman or Chris fix !!!!! Great video Thanks 😊

Outstanding info...thank you! I just happened to have an on-going oxygen sensor issue.

Man you explain things so concise and with brevity! I love it! Im subscribing and thanks!

Hi. When decelerating, my fuel system is in open loop, but once the speed fall anywhere between 20 to 10 mph, for a second I get OL has not satisfied yet conditions to go to CL, then immediately goes into CL using all oxy sensors, while still decelerating down from 20 to a stop. What would that indicate and does need to be done? No codes, no lights. PS: you’re one of the most knowledgeable mechanics and the videos show it all.

Thanks for this video of teaching, you're a smart guy and a great mechanic I'm learning DIY, 4 years now and still much to learn. Thank you sir.

I love your descriptions the way you explane every thing my noggin (witch now is a mush melon from all the shots to said noggin in 53 yrs) I may get my 98 ram running finally. thanks man appreciate you.

G'day Mate, I always watch your shows on my TV however today I'm using the computer to view your video on how to test 2 02 sensors. Which is why I'm using this opportunity to comment. Fantast work, your shows are easy to follow and always like/love the little side track you take us down usually comedy-type commentary. Cheers, very much appreciated. I'm from Australia. 👍

Thanks bud you’ve simplified hours of online wiring diagram searching for me. ✊

I can believe how easily you explain things that could take days to understand!! Great job brother

Run for president in 24. You got my vote. That explained everything i needed to know about my O2 issues. Thanx.

Excellent video - generalized, precise and informative!

You have outlined the hard way, the easy way is just to go to the pick & pull yard and clip the connector off of another Toyota of similar year range and match the wire colors

My problem is that I really can't understand what you are explaining so I can not learn from you videos .. but I just try to get something from it..Thanks..

Great history, trouble shooting, and explanation of the how and why. Thank you for the knowledge:-)

That's an interesting short hand trick. I've always reached for a diagram before moving forward, which is easy enough if you only work on a few cars. On paper it seems risky to send +12V into the PCM backwards along a signal wire that normally carries only 4.5V of miniscule current forward. However I see that many experienced and respected techs have confidence to do it all the time as a quick test, assuming the protection of resistors and diodes inside the driver. Of course current is limited by the test light resistance. It would be a different story if somebody used a jump wire from the pos side. It takes a little more work to back probe connectors while they are hooked up to measure functional values in a working sensor, especially if confused when the PCM shuts down the heater. Still, it is fun to see waveforms directly if one has the time.

I'd vote for you if u run for President

As always, great information using real life applications. Keep it going!

Very professional experience! You taught me something I didn't know today. Thank you, sir

I like the squeezy sensor at the end 🤣🤣🤣

Very good job of breaking it down for the people , I have a hard time explaining things like this to friends and customers.....great video...

YOU ARE A GREAT GUY WITH FULL OF KNOWLEDGE AND LOVE YOUR PROFEESION AND ALSO AT SAME TIME LIKE PEOPLE TO LEARN FROM YOU I LOVE YOUR VIDEOS AND HAVE LEARN A LOT THANKS FOR EDUCATING US

Great vid as usual. Love that u can simplify something that can be very confusing.

I thought this guy was wearing suspenders, this whole time I've been watching his video... until just now!

Sir, I commend your calm and expert instructions. You remind me of my Auto Tech 1 teacher in college, Mr. Garza.

I am glad that I viewed this video so I know where to look for the oxygen sensor and I know that you should check out the wiring going to the junction box first before checking the sensors to make sure that the wiring is fine too.

Great instructional procedures,of how to determine which wire is which,thanks

Good watch made things simple I am a diagnostic vehicle tech and loved your simplicity

"Easy peesy, boobi squeezy" at the end 🤣🤣

Your like one of the best mechanics on KZfaq you explain things so its easy to understand aslo you have a really nice yard and house looks so nice love California

B1S1 connector - Terminal 1 and 2 are for the heater (HT and B+) and are BLU/BLK and BLK/ORG respectively. Terminals 3 and 4 are for the sensor (OXR2 and E) and are WHT and BRN.

WOWER MAN...that was a perfect comprehensive learn for the DIY GUY. FANTASTICO

Good video my son will be able to do it for me keep videos coming

If this guy is like me, he'll be running this video back and forth a few times. Great explanation. Probably better than the manual. Thanks

Paul had a good question and you got a good idea for a video. We all win!

Nice video dude. Im currently working on why my car feels fast, smooth and quiet one day and lazy, sluggish and grunty another day. It drove me mad. I think my b1 s2 heater element retired early and not allowing ecu to enter closed loop sometimes. I reset the adaptions and feels alot better but goes back to lazy mode again later on.

I love this guy so much lol. I binge watch all his videos so much

Usually sigals fly above the ground close to the ocean

Eazy peezy boobie squeezy!! This has been added to my sayings!! Thank you! Love the videos very engaging and easy to follow!

Thank you I have been dealing with a 05 f150 burned wires that I had hooked up wrong

Great video as always. Will try and wire a 2 wire O2 sensor soon. Will let you know how it goes

What a useful video. My o2 sensor is acting up on my 2001 Olds Intrigue. I wanted to know wth is up and your video is greatly informative.

Maaaannnnnn ! I am subscribed a a number of high level content providers but do not have the new video notification bell on for any of them… except one… :-) …. We if you’re not Italian you should be !!!!

Good vid always good info. Best term to use on DC systems is common not ground. Also when you test for restistence across the signal wire and common, the voltage applied from your meter could damage the o2 sensor. Output voltage on o2 sensors are very small. This is what I learned from watching other vids. Not from my own experience, so I don't know how true that is or not.

Great job explaining about the oxygen sensor..I need to replace the one in my car- 2010 Ford Explorer 6 cylinder..

Very thorough and detailed I thought it was very good..

Perfect hair on the perfect instructor.

Always love watching your videos. This was really easy and a good way to test o2 sensors; as well as giving people a basic idea as far as wire chasing most connectors/sensors. 👍 Definitely would like to see more of these videos.

Hey buddy great video I've been a mechanic most of my life but I've always been intimidated by the electronical

Hey R.A.W. great video thanks for showing how oxygen sensor works.

the white board signal is spelled "Signal" you wrote "Sigal", it is OK, you will still make a great president

As I understand it from most diagnostic techs, the two white wires are for the Heater (+-)and the remaining wires are Signal (+) and Ground (-). The Heater on the O2 sensor doesn't care which is + or -. The remaining Signal + and - Ground, it is critical to have them correct.

Lmao. This video is so old but I love your videos as well. That running for president joke is still valid and at the great advice you give in your videos… I mean at this point it must be a walk up and apply type of thing

Thank you brother you just showed me how to fix my wiring an it worked perfectly!!

Great video. I understood the basics but didn't know the ground was switched on one circuit and the power also might only come on when running on the other circuit.

Thank you for all that you do and keep up the great work and stay positive as you are

Dude you have forgot about more things dealing with the engine than I have ever known and I call myself pretty good. Keep doing what you do. If you treat the Presidency like your vehicle diagnostic hell I mean heck (keeping it PG) we will be a step above later I expect a check in the mail.

super informative. Love videos like this. Good instruction, thank you for sharing.

Very good troubleshooting method. You used logic!

I like your videos because they are more informative & value Big gratings from KSA

So I basically don’t need to take mechanic classes, most of the things I need to know are on your channel.

Great video, but the two wires that should show resistance are the two ground wires, on the sensor side I’m talking about

Is that Oxygen Sensor's First Name Steven? Steven Sigal? Just kidding, I have a TON of respect for People that are Bilingual, or more, and are doing such a Great Job at multiple Languages. However, I can't resist a Bad Joke or Pun. Okay, back to watching the Video. (Thumbs Up)

Very good information. Keep up the good work. What is a SIGAL? 😁

Awesome videos!!! Thanks for sharing the knowledge. I was able to fix my 1997 Accord’s sensor problem. It’s running like new!! Have a great holiday season!!

I think my wires are muddled up, my engine light is on all the time, the idle is a little rough.. Looked at wires, I feel like I need to change a couple of them over to match properly.... thanks for the video!

Bro I need help so I put a test pipe on my audi a4 07 but I didn't like the sound of it so I took it off an put my cat back and once I put it back I got a misfire on cylinder 2 I change my spark plugs an my coils an im still getting that same p03002 misfire ur videos have help me alot BTW u got some talent

Good vid! Easy peasy booby squeezy! A great line for my arsenal! TY 😂

Very clear and simple instructions ..nice job

Hmm.. My thought is you should run for president. I know that you would do a better job than the crooks in there now. Thank you for your time it’s appreciated. 😎👍

Thank you, nice to see you!

witty... love your sense of humor

Mr. President, if anyone can get this country back on the road, it's you! I have a lean O2S bank 1 sensor 1, P0171 &1131. OBDii states lean condition. I plan to replace the PVC valve as its original equipment. I suspect, haven't verified it yet, but it's probably a clogged O2S. Beside gasoline, what other fluid could be used to quickly dissolve this mess that won't damage the O2S. I suspect it's either soot or oil from way of the PVC valve accumulated in and on the O2S. (4 wire, 1998 Toyota 4cyl. 5SFE) The O2 in this car is over 200 bucks new, I would rather buy time until next year saving up bit by bit as that is a very big chunk of change. In fact all the sensors are original. And because of lack of experience I suspect when I do try to clean the O2, it will take a lot of hard work just to remove it.

Hi I'm your new subscriber from Indian,you explain everything well thanks for your effort👍I'm looking forward to air fuel mixture tips from u.

Love you videos bro! You say on the 4 pin, have 2 grounds and one is constant. My issue is, key off, black is constant and so is my black/blue wire. Prob why im throwing a P0138. The heating element never shuts down.

You should write yourself some jokes and go to an open mic night at a comedy club because you have a natural timing ability that would work great in stand-up comedy.

can u make a video about 5 wires wideband o2 sensor (lambda sensor) plz

Hey dude, i actually enjoyed your video thanx! It gave me insight for my amber light problem . Have't solved it yet but will watch more of your video,s . I thought your video,s were very direct , an i liked the way u explain things...awesome !

Thanks for the video Ratchets and Wrenches-keep up the good work, a dealership over filled the engine oil on my new Lexmoto 125 scooter twice and the bike is misfiring, the spark plug was fowled and I am guessing so must the oxygen lambda sensor which has the four wires, on the diagnostic the fuel integral term drops to minus -5 and so do the volts the engine is also over heating susceptibly, would anyone know if it is worth trying to clean the oxygen sensor and soaking it. over night with engine cleaner stuff in a jar or what else I could or should be looking out for when taking on this task please? God bless cheers

My car has a bad o2 sensor, but I drove it anyways for quite a while, and now, "out of nowhere", it started shaking and vibrating like crazy. Any explanations for that? Love the vids btw.

Thanks, i like the way you work. Go my friend.

That's good to know about the switching ground and the permanent ground. Nice! Does anyone know the reason for not switching the positive?

Hi this is Brent from Grenada. I have a 1996 rav4 2door with 3sge engine with a540h transmission. Now it only change when it is hot from first gear and also reverse

Fez all grown up. Love it

Thank you, i have learned something new today.

This video really helped me. Thank you very much!

Made very easy to understand destand

Great video . 'y signal wire is broken somewhere. Can I bridge to the other sensor ?