Dear Professor, I am from Philadelphia myself originally and was glad to see your video. It aided me in understanding the issues I had with my vehicle (Ford 2015 Police Interceptor Utility). In the end I ordered the proper part online and paid a shop $50 to install the O2 sensor for me (as I had neither access to a lift nor a jack that could get my car up high enough for me to use a breaker bar to remove the O2 sensor myself, even with the proper O2 sensor removal socket in hand). Your video is highly instructive and well appreciated in no uncertain terms and thank you for effectuating its publication.
Having spent 4 years in college and 4 more in dental school learning my craft I must say you are one of the best teachers ever. I fell into this by accident and watched the whole thing just because my check engine light is currently on. Thank you so much. Now I feel like I can speak knowledgeably with the tech about my car problem when I take it in. Good job, Car Doc !
To everyone who is commenting about this guy talking to much well that's because he loves his job. !!! He is eager to help people. I can tell he just wants to make sure everyone understands about what the check engine light does. Some of us like myself a woman who have no man around the house need a full lecture like he is giving. So if we have to take it to a mechanic we don't get well you know. Because I have been just like my transmission. The guy told me it was my transmission and it could not be rebuilt. I didn't know that. He also told me he would have to order from California I live in Texas and it would take a few days to get to his shop. Keep in mind he had not even took the transmission down. So I gave him the okay I had to have my car for work and would you believe the next day he called and said my car was ready.??? What happen to the 2 or 3 days shipment to his shop. I believe what he did was took down my transmission and it was a minor repair and fixed it and charged me for a transmission I just wish I knew if there is a way to tell if I have a new transmission on my car instead of the old one still being on there. I know its the same transmission. So Thank you for detailed information because I have no idea of car mechanics and after this video I am now well informed. I am going to attempt to fix my own oxygen sensor. thanks
The ONLY way to be sure that parts have been replaced, is to state at the outset... "I want ALL old components that have been replaced kept, so that I can examine them." Most dealers won't carry old parts - just in case - because they'd need a shop full of junk... So the likelihood is that they will assume you know what you are talking about, and minimize replacement parts...
This must be one of the best and explicit videos on the theme that I have seen. This person is great at teaching because he really knows the science behind the theme. Great video!
Young people today won’t care to fix or do anything, they just pay someone. I’m a senior citizen and making more money today doing simple tasks on cars and around house than I did on my full time job, prior to retiring.
Like everyone else I thought it was an excellent demonstration video too! Key thing for me is your emphasis early on in the difference between professionally qualified technician and others (accepting that experience is important factor) - cars are sophisticated and require techs to be deep thinkers/analytical in their approach and able to reflect on their practise to complete differential diagnosis and subsequent interventions with the great technology available to support this. No surprise, I was a health professional for over 32 years before deciding to study Automotive Engineering. Codes, standards of practise and ethics come into play. There are alot of similarities where its a person or a car (and its owner that you are helping). UA-cam and these high standard videos have really helped my learning.
Retired English mechanic, left the trade after 40yrs before all this stuff really took off. Try to stay updated and videos like yours are so great. You remind me of one of my college lecturers back in the sixties he had a real passion for his subject and was able to inspire all us would be mechanics..Great video thanks so much!
Great video, Dan! This is why getting a car fixed these days is expensive. This is the right way to fix an engine light. Taking a test drive would be suggested, as a final test.
Man I can only say something, this video is the best of the best telling us the most complete class about the Oxygen Sensor, and everything clearly explained with easy understanding words!
Loved the video/training! One of the best free college classes i've ever had!! You have no idea how much this means to people who can't afford expensive car care or training. This is what giving back to the community, help others is really about. Thank you so much Sir!
Excellent. While you did say pin # 4 after reading it correctly as pin #2, you correctly re-checked the reference page and did exactly choose and say you chose the pin #2. You said pin # 4 once but you said and used pin # 2 twice and correctly. Someone mentioned this thinly a while ago. I know that you chose the right one and you double checked the info as you proceeded so I saw and heard an excellent mechanic being careful and rechecking the reference info on the fly. I work on my vehicles and occasionally help others(never for pay) and I warn them that while I refer to myself as a mechanic by experience, I have had very little actual training. I am in Texas and am too far and too old to get to your class and I very much regret that. This is my first viewing of one of your videos. I subscribed immediately and I hope to find more. WOW, way to go Dan Reed.
I just came across this video accidentally. My goodness wasn't I glad I did. Well documented & illustrated fault finding & understanding about O2 sensor. Top man Dan. Well done.
This Prof. has done an exceptional job with explaining the nuances of troubleshooting and diagnosing the problem. I wish I could be his student. Great job!!
I have very limited knowledge and appreciate this very detailed lesson. Anyone sitting at this guy's automitive class/classroom will surely learn. Thank you!
Dan. One of the best presentations I have seen. Everything was explained in simple terms. My mechanic told me I have a problem with the heater circuit in O2 sensor past the catalytic converter. So what I'll do as a quick check is remove it, get a wiring diagram from Bosch and check the resistance of the heater coil. My mechanic says he doesn't mess with that stuff. I don't know why. That's why I took it to him. The thing is I just replaced that sensor not too long ago. I talked with the man at Bosch and he's going to see what he can do for me if it is the heater circuit. Thanks for the help. Bill Piech Raleigh, NC
I cannot believe how good this guy is and how interesting and knowledgable he is to listen to, i practically know nothing about cars but a novice could easily become confidant around an engine after listening to his teachings, superb, i am so pleased i came across this web page :)
I've watched alot of car repair videos and yours by far was the most thorough, clearly stated, accurate non bs best one i've ever seen to say at the least. Thank you so much! Keep up the great work!
Absolutely wonderful video. Very informative, I would give 10 stars. I have no words for this professor. I wish I could learn more about car repairs from this professor. Overall, Thank you so much for your time. I will definitely follow and watch more of these videos.
Am not a mechanic or engine enthusiast, but because on 2 occasions my Nissan developed this check engine with P0420, i am so informed right now. My local mechs will not lie any more especially on codes that are logic based, Thank you so much for the educative video. Will return once i buy new O2 Sensor
A few other things to try if everything in this vid fails to break it loose (a GREAT vid, by the way): 1. If you are not going to reuse the old sensor, and have cut off the wires DO NOT USE A SLOTTED TYPE SOCKET! They do expand enough to slip and round off your hex if you put enough pressure on them! Just use a regular 7/8", six-side socket if you cut the wires off. 2. A slight variation to the vid, where he heats both parts: try heating the mainifold only, as much as possible, getting as little heat on the sensor as possible. Heating them both will cause both the manifold and the sensor to expand from the heat. The ideal situation is make the mainifold threads expand MORE than the sensor threads, breaking the bond more easily. 3. If that doesn't work try it again. This time when you are done heating, wrap a damp rag around the sensor (keeping it away from the manifold as much as possible) to contract the sensor threads. Try again quickly. 4. If these don't work, heat the crap out of the manifold AND the sensor until everything is as absolutely as red hot as you can get them, then douse everything with water. The intense and rapid contraction might break the bond. If you try enough things, enough times with heat, it WILL come loose. You simply have to break that bond between the threads. Just don't give up, and don't round off the hex or you will have a whole other problem. Again, nice vid. Do as he says once you have the slightest movement. Lots of oil, lots of patience, back-and-forth until you work past the corrosion.
Brilliant explanation, thank you Sir. If you don`t know about O2 sensors after watching this video, then I don`t know what will help you. The best video on the subject I`ve found so far!!
Excellent explanation and instruction Dan! Your performance in front of the camera is extremely competent with no attempt at being an internet "star", which for me, will now make me watch many more of your videos. You are a STAR! :-)
Now I know what they're talkin about when I'm reading and it says lean code. When they mention fuel trim. I always read it but I never understood where it actually stands for. Now I do thank you. You are truly an educator thank you for choosing this career.
Senor Reed, you are definitely an excellent instructor and I love the way you present and clarify this very valuable information regarding 02 Sensors! Love this video and this is by far one of the best videos I have seen and love the way you explain and simplify the steps and procedures you are taking in completing this type of diagnostics! Keep up this great work and I'll be looking forward to all your future videos! Happy Trails, Hasta Pronto!
Love this presentation. This CCP video very helpful for beginners. I graduated from PCC( Pasadena City College), major in automotive technology. Now I’m truck driver, used to work for Mercedes dealer for over 20 years, specialized in automatic transmission overhaul. Can’t handle it anymore due to state of the art model come out.
Great performance. You stayed on track and got to the meat and potatoes of the diagnosis. I'm sure this will help me in my journey to track down the issue with my truck!
Very knowledgeable person, but when I noticed his teaching should have included in how to clear the keep will add memory in computer and the reason for doing so. I was senior master with Ford, master with Nissan, and Subaru etc. We were always taught to do this with these manufacturers. As a retired technician I try to stay refreshed and this gentleman is a very good teacher and I'm very impressed with this program. Thank you.
Dan, you are the man. Technical and to the point. My GMC has a bad O2 sensor. Not too worried about it yet but it does need to be assessed. Your video gave me much insight i what I need to do. Thank you!
Hi i had a head gasket burned out due to water leakage.Since then i repaired that engine but after that i had engine yellow light to comes on & off engine was running roughly.I replaced that engine with an other one with 60.000 km ,but the problem exist !! the computer says Number 4 th injector problem.Replaced No 4 with a new one ,still i have the same problem .the last two days the yellow eng.warning lite is stady ,but the time it starts to goes off & on engine lose power like working on 2 cylinders!!!!...Any idea what going on with that problem????? thanks a lot for your time
Dan, you the man....I followed you instruction too the letter and fixed the bad bank 1 sensor 1 in my b2300 Mazda 2.3 liter. Thanks so much for the attention to detail
I really enjoyed this video. You took the time to talk about a part most people do not understand. O2 sensors are probably the most misunderstood part of the emissions system. Great job!!!
I like this guy. Very detail oriented. Although knowledgeable, he knows how to teach the basic of his subjects to new/DIY people. Thanks. I learned a lot.
I had a 1980 Dodge d50 pickup and the Mitsubishi equivalent. Both had an exhaust manifold with a built in cylindrical catalytic converter in the two piece exhaust manifold. I took both out and used a screwdriver to break up and remove the guts of the converter in both. Drastically improved performance of both trucks. I converted one into a convertible. It was a cool thing back in the day. FWIW, I had to do the first one because, when I checked it, the top had been melting like pudding. The makeup of the thing is like a 3D screen. That is, instead of the holes being tiny squares, they were tiny tubes, about 6-8 inches long, IIRC. But so many of the tubes were clogged from the "melting" that it created massive back pressure. So I got rid of it. :) This was in the Seattle area. They still passed emissions tests. It was also around the late 80's.
Great video except when finding PIN numbers to check the resistance/continuity, you read right from paper but said incorrect pin #1 &4 instead of #1 & 2 and while actual testing both old and new sensors, you used correct pins #1& 2 where old found open circuit (L) and new one measured 3.7 Ohms. You may want to correct your audio on it.
Bashir, although that may be the case, it is a minor typo hardly worth the mentioning. Anyone getting into this kind of work should use their specific technical specs and choose the correct terminals without issue!
Really? I think it's a significant enough error to mention and really has nothing to do with how sharp you are or aren't and/or your enthusiasm or lack thereof for the auto repair industry you're either employed in or not. It was an error. Errors should be corrected. Period. Good eye/ear Mr. Chughtai. 😉
25:30 Actually we have thousandths of a cent not hundredths of a cent regarding millivolts. Exceedingly good video presentation: quality video, great tools, and smart, well spoken, experienced, qualified technician.
I have watched several videos on fixing the engine light-on problem for Toyota 2003 Corolla for I have had the problem for many years. This time I changed my mechanic to Shell service station, Bellerose, NY 11001. He tested the engine with the diagoniser, and changed the top mount gasket, and that immediately solved the p0171 and p0770 problem. The engine light-on has been off since then. You may want to try this solution.
Dan, you should add a thread chaser tool to your vid. Cleaning the threads is good practice before installing a new 02 sensor. The sensors thread in better like slicing butter and helps with proper torquing to flatten the new washer. Especially, when you're working on a single, or 2 wire 02 that relies on exhaust manifold ground to comm with the computer. Just saying...
A very good video, especially with the practical test of the sensor and then the diagnostics tool demo. It appears that my Honda Jazz (UK) has suffered sensor failure which I suspect has been troubling the car (and me!) for the last few years. The practical test showed a heater resistance of 15ohms which I think is too high; this only heats to 10watts at 12volts which I think is too low. And the sensor output is 7mV which also appears to be far too low; I used the same blow torch test as you did. I feel more confident now to use a diagnostics tool to confirm the sensor status. Many thanks.
Wow! By far the most complete and accurate informative car diagnostic how to video I've seen. And i've seen hundreds. Thanks dan, for your most complete 02 explanation and detailed information and education. Its the exact information I needed which i didnt quite completely get with many other vids like this. bravo.
Many earlier cars, pre OBD2 don't have flashing engine lights, they just illuminate. I've soldered quite a few O2 sensor wires with no issues just make sure your wires are cleaned well and you get a nice wet looking solder and heat shrink insulation
Hi Dan had to pause it at 18 minutes in to add the main reason you do not attempt to splice a o2 sensor wire is because you can change the resistance in the wire and that will greatly effect the 1 volt to .1 volt reading affecting air fuel ratio mixture. Also like to point out that as you said never cut the wire past the harness connector but as long as you are replacing sensor YOU can unplug from harness and cut wires at o2 sensor making it easier to get box end wrench on it. I have a special tool but sometimes you can not get it on and some can be a real bear.
The main issue is that most O2 sensors use stainless steel for wiring, which can’t really be soldered well with over-the counter typical electrical solder. That in turn can lead into the voltage drop issue. But I totally get what you are saying.
Hhhhh man what a great gift u have first time I understand everything about o2 sensor keep going I'm native Arabic but completely understand what u say love uuuuu
38:59 "If I go between pin 1 and pin 4"; then proceeds to connect pins 1 & 2 Other than than minor bit of confusion it's a fantastic informative lecture. Many thanks.
One day my 07 Cherokee check engine light started flashing. I was not even midway home from LA to Vegas. I did notice misfire when this light came on power loss was very noticeable as well as some shaking when shifting gears from park to reverse 😨 So i stopped nearest O’Reily n purchased new gas cap thought it would work nope. Eventually got home w light flashing periodically. Next day went to my mechanic and did a tune up replaced all spark plugs and cleaned the intake air sensor as well & found out one of the spark plugs was cracked 😳 That was couple of years ago. Check engine light never came back on not even once after I replaced all spark plugs. Now 2 months ago my check engine light came on w p0420 code below threshold w the catalytic converter. Last week I finally replaced my whole catalytic converter system because bank 1 cc wasn’t “reaching the right heat enter and exit temperature tested via infrared gun from my mechanic. So a new cc system was needed sigh 😔 costed me $1100 for the system from O’Reilly & also picked up 4 new Bosch sensors @$35 each sigh 😔 then went to Meineke and had everything installed for $300 sigh again 😔 I also replaced a cracked radiator a week prior to this $600 😔 now I’m gonna be eating cup o noodles for the next 3 months 🥺 I’m $2K lighter and the positive thing is my 12 yrs old Jeep Grand Cherokee Laredo is running like a champ again! Still cheaper than buying a new car. Hoping my Jeep (170K) would last until 300K- 400K miles 🤞🏽 Meineke ended up using the torch as well to take out all of my sensors because they were all rusted and seized they couldn’t take off the 02 sensors and the 8 bolts that connects the CC to the headers but they did took em 4hrs to finish the work but I only paid $300. Moral of the story is this. I should’ve stopped the car right away when my check engine light started flashing couple years ago from that road trip coming home from LA to Vegas sigh 😔 but u know what? I had no idea that u we’re suppose to stop the car 🤷🏽♂️right then and there and I guess call a flat bed tow and have them tow my Jeep from Palmdale to Vegas which probably would’ve costed me close to $2K as well idk 🧐 I’m not a mechanic nobody told me about this, a hefty 2K lesson yaal. Turns out I damaged my bank 1 catalytic converter from gasoline entering the CC and driving it home for 2+ hrs flashing periodically. 😫 But she’s running good now sorry for the long ass rant yaal I hope somebody reads this and learn something from it ✌🏽anybody got $20 I can borrow? 🤑 👩🏽🔧 🚐💨💨💨
Very thoughtfully presented. I'm 71, retired and considering taking a auto mechanic course just for edification and fun at our local CC. Hope they can do as good a job expounding as you did. Thanks
This is my first time catching your video. I must say very well put together sir and informational and detailed. Exactly how a proper tech should explain to a customer and or students. Outstanding!! Thank you very much can't wait to see more of your work. Keep up the great work.
I Started Watching This Video and Thought I Knew a lot, But .....Let Me Tell You, after Watching This Video, I Feel Like I Can Tackle any O2 Sensor Problem or Code. a Hell of a Great Job and Thank You. Thank You.
Hey super Dan you are a good instructor I am retired from U of Delaware after 8 years I am back to my old job as a senior lab tech I instruct undergrad grad post Doc in the Composites field I enjoy every day of my retire life at U of Delaware enjoy your video
Your video is very helpful to help me figure out my issue with my o2 sensor on my 94 astro because my engine light would only come on once my van would heat up so now i know that mine is a one wire .. thank you very much very helpful
YOU SAID, the heater circuit is the TWO WHITE WIRES. But in your hand motion you were holding on to the grey and the white wire when testing for resistance.
Great Dan Reed. That was an good lessson about the o2 sensor. I have to check my vaccum slang when they didnt find whats wrong. My guess is that 5ohm element is broken but i have to hook it up and read. If not i might check the ohms. I havent noticed any issusis when runing or fuelconsumption. It comes and goes but now its stayed lit. So its time now. And yeah it was at the car dealer. And i did phone in at first. But its hard to find any wrong when its working excelent. Thanks.
Dear Professor,
I am from Philadelphia myself originally and was glad to see your video. It aided me in understanding the issues I had with my vehicle (Ford 2015 Police Interceptor Utility). In the end I ordered the proper part online and paid a shop $50 to install the O2 sensor for me (as I had neither access to a lift nor a jack that could get my car up high enough for me to use a breaker bar to remove the O2 sensor myself, even with the proper O2 sensor removal socket in hand).
Your video is highly instructive and well appreciated in no uncertain terms and thank you for effectuating its publication.
Having spent 4 years in college and 4 more in dental school learning my craft I must say you are one of the best teachers ever. I fell into this by accident and watched the whole thing just because my check engine light is currently on. Thank you so much. Now I feel like I can speak knowledgeably with the tech about my car problem when I take it in. Good job, Car Doc !
To everyone who is commenting about this guy talking to much well that's because he loves his job. !!! He is eager to help people. I can tell he just wants to make sure everyone understands about what the check engine light does. Some of us like myself a woman who have no man around the house need a full lecture like he is giving. So if we have to take it to a mechanic we don't get well you know. Because I have been just like my transmission. The guy told me it was my transmission and it could not be rebuilt. I didn't know that. He also told me he would have to order from California I live in Texas and it would take a few days to get to his shop. Keep in mind he had not even took the transmission down. So I gave him the okay I had to have my car for work and would you believe the next day he called and said my car was ready.??? What happen to the 2 or 3 days shipment to his shop. I believe what he did was took down my transmission and it was a minor repair and fixed it and charged me for a transmission I just wish I knew if there is a way to tell if I have a new transmission on my car instead of the old one still being on there. I know its the same transmission. So Thank you for detailed information because I have no idea of car mechanics and after this video I am now well informed. I am going to attempt to fix my own oxygen sensor. thanks
you should be able to see if you have a new/clean transmission or not,take it to a shop and have them check it.
The ONLY way to be sure that parts have been replaced, is to state at the outset... "I want ALL old components that have been replaced kept, so that I can examine them." Most dealers won't carry old parts - just in case - because they'd need a shop full of junk... So the likelihood is that they will assume you know what you are talking about, and minimize replacement parts...
Judy bug love all the talk
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
This must be one of the best and explicit videos on the theme that I have seen. This person is great at teaching because he really knows the science behind the theme. Great video!
Young people today won’t care to fix or do anything, they just pay someone. I’m a senior citizen and making more money today doing simple tasks on cars and around house than I did on my full time job, prior to retiring.
Show me the ways master I'm a struggling auto tech student
Yes young people today make $300,000 a year with a few clicks in Excel and on their computer
Like everyone else I thought it was an excellent demonstration video too! Key thing for me is your emphasis early on in the difference between professionally qualified technician and others (accepting that experience is important factor) - cars are sophisticated and require techs to be deep thinkers/analytical in their approach and able to reflect on their practise to complete differential diagnosis and subsequent interventions with the great technology available to support this. No surprise, I was a health professional for over 32 years before deciding to study Automotive Engineering. Codes, standards of practise and ethics come into play. There are alot of similarities where its a person or a car (and its owner that you are helping). UA-cam and these high standard videos have really helped my learning.
Simply the best O2 senor video I have ever seen.
Retired English mechanic, left the trade after 40yrs before all this stuff really took off. Try to stay updated and videos like yours are so great. You remind me of one of my college lecturers back in the sixties he had a real passion for his subject and was able to inspire all us would be mechanics..Great video thanks so much!
Outstanding Sir. Clearly you've played a structural role in your Automotive Academia with helping our nation's youth secure employment.
Great video, Dan! This is why getting a car fixed these days is expensive. This is the right way to fix an engine light. Taking a test drive would be suggested, as a final test.
Man I can only say something, this video is the best of the best telling us the most complete class about the Oxygen Sensor, and everything clearly explained with easy understanding words!
I am a french speaking person, one beginner and I agree 100% with you
91 ford explorer 4.0 IT WILL IDLE SMOTH THEN WHEN YOU GIVE IT GAS IT WILL FALL ON ITS FACE AND DIE
Absolutely excellent, outstanding, informative, educational, helpful, well organized, superb instructions.
Clearly illustrated... Naturally gifted teacher.. You should consider it as a full time profession!
Loved the video/training! One of the best free college classes i've ever had!! You have no idea how much this means to people who can't afford expensive car care or training. This is what giving back to the community, help others is really about. Thank you so much Sir!
Excellent. While you did say pin # 4 after reading it correctly as pin #2, you correctly re-checked the reference page and did exactly choose and say you chose the pin #2. You said pin # 4 once but you said and used pin # 2 twice and correctly. Someone mentioned this thinly a while ago. I know that you chose the right one and you double checked the info as you proceeded so I saw and heard an excellent mechanic being careful and rechecking the reference info on the fly. I work on my vehicles and occasionally help others(never for pay) and I warn them that while I refer to myself as a mechanic by experience, I have had very little actual training. I am in Texas and am too far and too old to get to your class and I very much regret that. This is my first viewing of one of your videos. I subscribed immediately and I hope to find more. WOW, way to go Dan Reed.
I just came across this video accidentally. My goodness wasn't I glad I did.
Well documented & illustrated fault finding & understanding about O2 sensor. Top man Dan.
Well done.
This Prof. has done an exceptional job with explaining the nuances of troubleshooting and diagnosing the problem. I wish I could be his student. Great job!!
I have very limited knowledge and appreciate this very detailed lesson. Anyone sitting at this guy's automitive class/classroom will surely learn. Thank you!
I must say this is a high quality vid for 02 sense diagnostics. Good job, Dan!👍
Done very professionally ,
Thank u
B M
Dan. One of the best presentations I have seen. Everything was explained in simple terms. My mechanic told me I have a problem with the heater circuit in O2 sensor past the catalytic converter. So what I'll do as a quick check is remove it, get a wiring diagram from Bosch and check the resistance of the heater coil. My mechanic says he doesn't mess with that stuff. I don't know why. That's why I took it to him. The thing is I just replaced that sensor not too long ago. I talked with the man at Bosch and he's going to see what he can do for me if it is the heater circuit. Thanks for the help. Bill Piech Raleigh, NC
I cannot believe how good this guy is and how interesting and knowledgable he is to listen to, i practically know nothing about cars but a novice could easily become confidant around an engine after listening to his teachings, superb, i am so pleased i came across this web page :)
I've watched alot of car repair videos and yours by far was the most thorough, clearly stated, accurate non bs best one i've ever seen to say at the least. Thank you so much! Keep up the great work!
Absolutely excellent, outstanding, informative, educational, helpful, well organized, superb instructions.
+l[
Absolutely wonderful video. Very informative, I would give 10 stars. I have no words for this professor. I wish I could learn more about car repairs from this professor. Overall, Thank you so much for your time. I will definitely follow and watch more of these videos.
Just found this video and the entire playlist.
I am very fortunate to have found your work.
May you be safe and well
Am not a mechanic or engine enthusiast, but because on 2 occasions my Nissan developed this check engine with P0420, i am so informed right now. My local mechs will not lie any more especially on codes that are logic based, Thank you so much for the educative video. Will return once i buy new O2 Sensor
A few other things to try if everything in this vid fails to break it loose (a GREAT vid, by the way):
1. If you are not going to reuse the old sensor, and have cut off the wires DO NOT USE A SLOTTED TYPE SOCKET! They do expand enough to slip and round off your hex if you put enough pressure on them! Just use a regular 7/8", six-side socket if you cut the wires off.
2. A slight variation to the vid, where he heats both parts: try heating the mainifold only, as much as possible, getting as little heat on the sensor as possible. Heating them both will cause both the manifold and the sensor to expand from the heat. The ideal situation is make the mainifold threads expand MORE than the sensor threads, breaking the bond more easily.
3. If that doesn't work try it again. This time when you are done heating, wrap a damp rag around the sensor (keeping it away from the manifold as much as possible) to contract the sensor threads. Try again quickly.
4. If these don't work, heat the crap out of the manifold AND the sensor until everything is as absolutely as red hot as you can get them, then douse everything with water. The intense and rapid contraction might break the bond.
If you try enough things, enough times with heat, it WILL come loose. You simply have to break that bond between the threads. Just don't give up, and don't round off the hex or you will have a whole other problem.
Again, nice vid. Do as he says once you have the slightest movement. Lots of oil, lots of patience, back-and-forth until you work past the corrosion.
Persistence pays off.
Brilliant explanation, thank you Sir. If you don`t know about O2 sensors after watching this video, then I don`t know what will help you. The best video on the subject I`ve found so far!!
Excellent explanation and instruction Dan! Your performance in front of the camera is extremely competent with no attempt at being an internet "star", which for me, will now make me watch many more of your videos. You are a STAR! :-)
Hey Dan you seem like a good guy who likes to share honest information to other people. Thanks..
One of the most informative videos I've seen yet.
Now I know what they're talkin about when I'm reading and it says lean code.
When they mention fuel trim. I always read it but I never understood where it actually stands for. Now I do thank you. You are truly an educator thank you for choosing this career.
Thanks so much for the kind words!
Senor Reed, you are definitely an excellent instructor and I love the way you present and clarify this very valuable information regarding 02 Sensors! Love this video and this is by far one of the best videos I have seen and love the way you explain and simplify the steps and procedures you are taking in completing this type of diagnostics! Keep up this great work and I'll be looking forward to all your future videos! Happy Trails, Hasta Pronto!
B
Firstly I wondered how a technician could be explaining like a professor; but vow he is really a professor!
Amazing presentation laid out clear and concisely. Incredible teacher fantastic job. Thank you
Love this presentation.
This CCP video very helpful for beginners.
I graduated from PCC( Pasadena City College), major in automotive technology.
Now I’m truck driver, used to work for Mercedes dealer for over 20 years, specialized in automatic transmission overhaul. Can’t handle it anymore due to state of the art model come out.
WOW! I have watched many videos for repairing my car. This one is the best and most informative I have ever seen on UA-cam!
L
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Great performance. You stayed on track and got to the meat and potatoes of the diagnosis. I'm sure this will help me in my journey to track down the issue with my truck!
Very, very informative. I like the side talk that supplements the information.
Very knowledgeable person, but when I noticed his teaching should have included in how to clear the keep will add memory in computer
and the reason for doing so.
I was senior master with Ford, master with Nissan, and Subaru etc.
We were always taught to do this with these manufacturers. As a retired technician I try to stay refreshed and this gentleman is a very good teacher and I'm very impressed with this program.
Thank you.
Dan, you are the man. Technical and to the point. My GMC has a bad O2 sensor. Not too worried about it yet but it does need to be assessed. Your video gave me much insight i what I need to do. Thank you!
Brilliant video Dan, I learnt heaps about O2 sensors. Keep up the good work!
Hi i had a head gasket burned out due to water leakage.Since then i repaired that engine but after that i had engine yellow light to comes on & off engine was running roughly.I replaced that engine with an other one with 60.000 km ,but the problem exist !! the computer says Number 4 th injector problem.Replaced No 4 with a new one ,still i have the same problem .the last two days the yellow eng.warning lite is stady ,but the time it starts to goes off & on engine lose power like working on 2 cylinders!!!!...Any idea what going on with that problem????? thanks a lot for your time
If we have so much troble with flat conector why no makend round ???????????
Dan, you the man....I followed you instruction too the letter and fixed the bad bank 1 sensor 1 in my b2300 Mazda 2.3 liter. Thanks so much for the attention to detail
I want to thank you Dan Reed for the information you show how to diagnostic 02 sensor I be able to fix my problem in my car
Excellent Job!!! seriously !!!! You need a raise! I now fully understand how to fix my o2 sensor issue. Very impressive!
40:00 I was almost at the point of thinking you where going to further diagnose and then repair the heater of the sensor. Amazing video 👍
I really enjoyed this video. You took the time to talk about a part most people do not understand. O2 sensors are probably the most misunderstood part of the emissions system. Great job!!!
Wow you’re a great teacher.
Thank you
I like this guy. Very detail oriented. Although knowledgeable, he knows how to teach the basic of his subjects to new/DIY people. Thanks. I learned a lot.
Thanks Dan very informative video and great presentation
I had a 1980 Dodge d50 pickup and the Mitsubishi equivalent. Both had an exhaust manifold with a built in cylindrical catalytic converter in the two piece exhaust manifold. I took both out and used a screwdriver to break up and remove the guts of the converter in both. Drastically improved performance of both trucks. I converted one into a convertible. It was a cool thing back in the day.
FWIW, I had to do the first one because, when I checked it, the top had been melting like pudding. The makeup of the thing is like a 3D screen. That is, instead of the holes being tiny squares, they were tiny tubes, about 6-8 inches long, IIRC. But so many of the tubes were clogged from the "melting" that it created massive back pressure. So I got rid of it. :)
This was in the Seattle area. They still passed emissions tests. It was also around the late 80's.
Great video except when finding PIN numbers to check the resistance/continuity, you read right from paper but said incorrect pin #1 &4 instead of #1 & 2 and while actual testing both old and new sensors, you used correct pins #1& 2 where old found open circuit (L) and new one measured 3.7 Ohms. You may want to correct your audio on it.
i also noticed that haha, great demonstration
Bashir, although that may be the case, it is a minor typo hardly worth the mentioning. Anyone getting into this kind of work should use their specific technical specs and choose the correct terminals without issue!
Really? I think it's a significant enough error to mention and really has nothing to do with how sharp you are or aren't and/or your enthusiasm or lack thereof for the auto repair industry you're either employed in or not. It was an error. Errors should be corrected. Period. Good eye/ear Mr. Chughtai. 😉
Top shelf instruction. Thanks for the clear diagnostic approach to finding what is wrong with oxygen sensors. Excellent presentation.
25:30 Actually we have thousandths of a cent not hundredths of a cent regarding millivolts. Exceedingly good video presentation: quality video, great tools, and smart, well spoken, experienced, qualified technician.
Your video saved me a lot of worry about HOW to remove the electrical connector and wire of the O2 Sensor from the frame
I have watched several videos on fixing the engine light-on problem for Toyota 2003 Corolla for I have had the problem for many years. This time I changed my mechanic to Shell service station, Bellerose, NY 11001. He tested the engine with the diagoniser, and changed the top mount gasket, and that immediately solved the p0171 and p0770 problem. The engine light-on has been off since then. You may want to try this solution.
Very well done. A professional Auto mechanics teacher. Easy to follow and understand. Thank you Sir.
Dan, you should add a thread chaser tool to your vid. Cleaning the threads is good practice before installing a new 02 sensor. The sensors thread in better like slicing butter and helps with proper torquing to flatten the new washer. Especially, when you're working on a single, or 2 wire 02 that relies on exhaust manifold ground to comm with the computer. Just saying...
Good idea! Next show!
What’s the thread pitch on most, I work on diesel so I have chasers for the nox sensor and soot sensor
A very good video, especially with the practical test of the sensor and then the diagnostics tool demo. It appears that my Honda Jazz (UK) has suffered sensor failure which I suspect has been troubling the car (and me!) for the last few years. The practical test showed a heater resistance of 15ohms which I think is too high; this only heats to 10watts at 12volts which I think is too low. And the sensor output is 7mV which also appears to be far too low; I used the same blow torch test as you did. I feel more confident now to use a diagnostics tool to confirm the sensor status. Many thanks.
Snap-On makes the best 7/8 Sensor Socket. It's thin wall so it will work with sensors that have heat shields.
Wow! By far the most complete and accurate informative car diagnostic how to video I've seen. And i've seen hundreds. Thanks dan, for your most complete 02 explanation and detailed information and education. Its the exact information I needed which i didnt quite completely get with many other vids like this. bravo.
Great, informative, just what I am looking for. I like the theory, and style of your presentation.
Mike Dwyer too me
Many earlier cars, pre OBD2 don't have flashing engine lights, they just illuminate. I've soldered quite a few O2 sensor wires with no issues just make sure your wires are cleaned well and you get a nice wet looking solder and heat shrink insulation
I like your presentation, well detailed.
Dan Reed what a fantastic teacher you are I enjoy watching all of your videos
Excellent video and no don't make it shorter , everything needed to be said and done .
Hi Dan had to pause it at 18 minutes in to add the main reason you do not attempt to splice a o2 sensor wire is because you can change the resistance in the wire and that will greatly effect the 1 volt to .1 volt reading affecting air fuel ratio mixture. Also like to point out that as you said never cut the wire past the harness connector but as long as you are replacing sensor YOU can unplug from harness and cut wires at o2 sensor making it easier to get box end wrench on it. I have a special tool but sometimes you can not get it on and some can be a real bear.
The main issue is that most O2 sensors use stainless steel for wiring, which can’t really be soldered well with over-the counter typical electrical solder. That in turn can lead into the voltage drop issue. But I totally get what you are saying.
Hhhhh man what a great gift u have first time I understand everything about o2 sensor keep going I'm native Arabic but completely understand what u say love uuuuu
38:59 "If I go between pin 1 and pin 4"; then proceeds to connect pins 1 & 2
Other than than minor bit of confusion it's a fantastic informative lecture. Many thanks.
One day my 07 Cherokee check engine light started flashing. I was not even midway home from LA to Vegas. I did notice misfire when this light came on power loss was very noticeable as well as some shaking when shifting gears from park to reverse 😨 So i stopped nearest O’Reily n purchased new gas cap thought it would work nope. Eventually got home w light flashing periodically. Next day went to my mechanic and did a tune up replaced all spark plugs and cleaned the intake air sensor as well & found out one of the spark plugs was cracked 😳 That was couple of years ago. Check engine light never came back on not even once after I replaced all spark plugs. Now 2 months ago my check engine light came on w p0420 code below threshold w the catalytic converter. Last week I finally replaced my whole catalytic converter system because bank 1 cc wasn’t “reaching the right heat enter and exit temperature tested via infrared gun from my mechanic. So a new cc system was needed sigh 😔 costed me $1100 for the system from O’Reilly & also picked up 4 new Bosch sensors @$35 each sigh 😔 then went to Meineke and had everything installed for $300 sigh again 😔 I also replaced a cracked radiator a week prior to this $600 😔 now I’m gonna be eating cup o noodles for the next 3 months 🥺 I’m $2K lighter and the positive thing is my 12 yrs old Jeep Grand Cherokee Laredo is running like a champ again! Still cheaper than buying a new car. Hoping my Jeep (170K) would last until 300K- 400K miles 🤞🏽 Meineke ended up using the torch as well to take out all of my sensors because they were all rusted and seized they couldn’t take off the 02 sensors and the 8 bolts that connects the CC to the headers but they did took em 4hrs to finish the work but I only paid $300.
Moral of the story is this. I should’ve stopped the car right away when my check engine light started flashing couple years ago from that road trip coming home from LA to Vegas sigh 😔 but u know what? I had no idea that u we’re suppose to stop the car 🤷🏽♂️right then and there and I guess call a flat bed tow and have them tow my Jeep from Palmdale to Vegas which probably would’ve costed me close to $2K as well idk 🧐 I’m not a mechanic nobody told me about this, a hefty 2K lesson yaal. Turns out I damaged my bank 1 catalytic converter from gasoline entering the CC and driving it home for 2+ hrs flashing periodically. 😫
But she’s running good now sorry for the long ass rant yaal I hope somebody reads this and learn something from it ✌🏽anybody got $20 I can borrow? 🤑 👩🏽🔧 🚐💨💨💨
U sound like a fool
Dan is the type of guy who just likes to help people.
Very thoughtfully presented. I'm 71, retired and considering taking a auto mechanic course just for edification and fun at our local CC. Hope they can do as good a job expounding as you did. Thanks
You're another youtuber is talking through half of the video. Show how to remove it at the beginning. Nuff-Said 😮
This is my first time catching your video. I must say very well put together sir and informational and detailed. Exactly how a proper tech should explain to a customer and or students. Outstanding!! Thank you very much can't wait to see more of your work. Keep up the great work.
Excellent video...learned a lot!! Also a very good presenter.
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BOSS HOGG. Ihave 2001 chevy express 3500 have a security. Light on the brake ligth on the brake is already telrasd what is the problem of this
THANK YOU FOR YOUR SIMPLE BUT GREAT INFO iAM 65 AND I DID NOT KNOW THAT THEY HAD HEATER IN THE SENSORS THANK YOU AGAIN FROM UK
38:53 you say pin 2 and pin 1 per the diagram then say connect pin 4 and pin 1 at 39:02 then you connect to pin 2 and pin 1??? Which is it instructor?
Perfect analysis and video! You are awesome! Thank you very much! Keep doing this videos and helping us!
Clearly I understand your lesson even experienced mechanics.
Appreciated.
I Started Watching This Video and Thought I Knew a lot, But .....Let Me Tell You, after Watching This Video, I Feel Like I Can Tackle any O2 Sensor Problem or Code.
a Hell of a Great Job and Thank You.
Thank You.
Hey super Dan you are a good instructor I am retired from U of Delaware after 8 years I am back to my old job as a senior lab tech I instruct undergrad grad post Doc in the Composites field I enjoy every day of my retire life at U of Delaware enjoy your video
Great work, now I need to know the location for oxygen sensor bank 1, sensor 1 on a Toyota Nadia D4 model 1998
It’s somewhere in or around the engine, I know what I’m talking about, I dreamt of owning my own car.
Excellently explained and learnt how O2 sensor works by watching your videos
Very thorough explanation, making me understand the function of the "lambda" sond- Thank You
So helpful! Thanks... God bless You!
Great video - thx; Richie American Atheist
Your video is very helpful to help me figure out my issue with my o2 sensor on my 94 astro because my engine light would only come on once my van would heat up so now i know that mine is a one wire .. thank you very much very helpful
Brilliant - wish you were my instructor 20 years ago.
Extremely informative. A car is a machine. Not a mystery. Not anymore anyway, thanks to Philly CC videos!!!
You guys are good. I learn a lot from this video."
Thank you,watched this video now,great job,one of the best videos ever explained
I chuckled when you said,"well,that's an expensive way to make a mistake".
You have done a Great Job to demonstrate this very problem. Thank you very much.
Very informative and for most educational👍🏼
Thanks so much Mr Dan Reed for that best explanation.Big up
I questioned my ranger but she won't let me diagnosis her😭
Excellent autoTech Professor ! Now I know why O2 sensor replacement is better for gas saving !
Absolutely excellent, outstanding, informative, educational, helpful, well organized, superb instructions.
YOU SAID, the heater circuit is the TWO WHITE WIRES. But in your hand motion you were holding on to the grey and the white wire when testing for resistance.
Some people have the charisma to transmitting knowledge! Thank you.
good information thank you very.
I REALLY APPRECIATE you taking the time to educate us on this topic. You're a very good teacher. BRAVO! Thanks to camera person as well. 😊❤❤❤
good information on this video
Stephen Sweaney 66 9
Great Dan Reed. That was an good lessson about the o2 sensor. I have to check my vaccum slang when they didnt find whats wrong. My guess is that 5ohm element is broken but i have to hook it up and read. If not i might check the ohms. I havent noticed any issusis when runing or fuelconsumption. It comes and goes but now its stayed lit. So its time now. And yeah it was at the car dealer. And i did phone in at first. But its hard to find any wrong when its working excelent. Thanks.