CAN YOU PLEASE TELL OR SHOW US HOW TO CHECK HEATED O2 SENSORS, IM HAVING A PROBLEM WITH MY S2000 WHENVER MY ENGINE WARMS UP AND ACCELERATE ON THE HIGHWAY MY THROTLLE DOESNT RESPOND ITS LIKE THERE IS NO POWER BUT IF I PRESS IT DOWN SLOWLY IT WILL PICK UP, I REPLACED SPARKPLUGS,IGNITION COIL,MAPSENSOR AND TPS SENSOR,
@PrinceNeoLloyd If you can't find problem on your own, take it to the repair shop, they find you the problem and you replace the part yourself. This way you save money when not replacing parts by quessing.
2002>celica gt automatic> 1/10 times example: say i am driving on the freeway and i decide to open the throttle but car doesnt reply.> rpms go up, until i eas off the throttle and press it down slowly, it will pick up and go. i can down shift ;rom 'd' to '2' with no problem, so i doubt im having transmission problems?
IAM wondering how can i tell which wire is from the ecu and to the ecu for the sensor signal .. on my sensor diagram it says pink and black is power and ground ..then there is tan and purple the signal wires.. but which is come and which going
@frank0067 Those are for the heater which I hope to cover in future videos, only 1 wire will be the signal wire and to be honest the best way to see it is with a scan tool because you can check it while sitting in the drivers seat. Scan tools that show live data are pretty affordable these days.
Great video explaining how everything works! I have a 92 Accord EX and it has a check engine light code 41 for a oxygen sensor heater problem and i wanted to replace the sensor...only problem is I dont know where it is and none of the videos on youtube really help since they're for gms and apparently my car only has one sensor rather than pre-cat and post cat, since i've seen a couple videos of yours with cb7s,did you know where the sensor may be or maybe even have a picture of it in the car?
@Sanjeai Yes it should be located in the 'A' pipe just off of the engine before the cat, it might be in the manifold however I don't remember exactly, look in the exhaust as close to the engine as you can for what looks like a spark plug with wires coming out of it. When you find it to remove it I would cut the wires off of the sensor and use a 7/8 socket or box wrench to remove it rather than trying to remove it with an O2 sensor socket. Good luck.
HELP! i have a 2002 s10 2.2 . about 2 weeks ago it made a strange sound when starting then . bucked like crazy til lit warmed up. but now bucks like crazy all the time and smell of un burnt gas out exhaust . cant drive it. i checked tps. map. and a new temp sensor or water temp. . there is no egr on this model they say. no water in tank, and fuel is pumping. On the gas filter the one line on gas filter i cant pump fuel thru , but i can thru center lines of filter. and has new plugs
@sxr951 You might start by pulling any codes stored in the computer, if you don't have any codes go for the general tune up stuff and check the mechanical condition of the engine. Don't just blindly replace parts as that gets expensive.
So I have an older truck (1999, GMC, Suburban). There were no engine lights going off but my question is, even though the computer dose not say my O2 sensors are bad will it help the performances of the engine if I change them anyways? I mean will it help the performances a great deal? At that these things aren’t cheap... is there a way to clean them?
@bw110719 I'm not sure you will have any real gain from just replacing them but it can't hurt, I think the most you will notice is slightly better fuel economy. If your looking to get more performance start with the basics like a good tune up.
Thanks for all the great videos. I would like to mention that the optimum O2 sensor signal is not 0.5V, but instead swings from below 0,2V to above 0.9V. This is required such that both catalysts are functional within the catalytic converter. One catalyst only works below 14.7:1 AFR and the other only works above 14.7:1 AFR. This is a minor yet very important point. Many falsely believe that the computer just can't keep up and hence the swing. Actually the swing is for proper cat operation.
@lwgraves I see where your going with your statement however I stand by my statements because this is a video covering the basics of O2 sensor operation NOT AFR sensors or any specifics of either. Thanks for your input.
@DSchruteBeets The O2 is still good but the heater that is designed to bring the sensor up to temp has failed, this will make it so that it takes longer for the sensor to warm up but it will still work when it does.
Eric question... My new Honda is throwing a bank 2 O2 sensor code. I believe PO141 was the code..well I'm sure that's the code bcz according to my Honda shop manual cd ck'ing the 3/4 sensor leads with my ohmmeter it did not register in comparison with the pre-cat 02 that had 12Ohm...so my senses tell me to replace bank 2 downstream...thoughts? 65$ denso...
If you wanted to clean the sensors cleaning the outside will achieve nothing is there a way the clean the sensor which is under the metal casing maybe with carb cleaner or injector cleaner to remove deposits?
@EricTheCarGuy hey eric thanks for all your help man i really appreciate it. do you think you could do a video on how to read your smog check paperwork as far as knowing what repairs need to be made according to the test results. unless you already made one but i havent found yet, any help would be greatly appreciated. thanks again.
Hi Eric I Have 98 Corolla 02 Sensors Are Gone. I Found Them To Be Very Cheap On Amazon.com they are denso. dealer told me sensors have to be original toyota specific sensors and they are denso too, just at dealer sensors are million dollar each. So My Question Is What do you think, should I go for Amazon or Dealer Sensors? Thanks I Like You Work You Help All Of Us A Lot....
@ir1337zor I recommend getting the sensors into the stream as they will read better that way. I don't recommend running without a cat however. You will probably get a code P0420 but you can ignore it since your not running a cat.
@EricTheCarGuy Hi Eric, I have 01 camry, how will I know bank 1,sensor 1 is which one, Oxygen or A/F sensor? I thought to look original one on the car but I've been told they replaced a year ago. Maybe they installed the wrong one in the first place. The prices between O2 and A/F sensor are very different. If I put O2, will it be ok? or do I have to install A/F? Pls help...
@scyllis Bank 1 is always the bank with #1 cylinder, see the compression testing video I did for specifics. You didn't mention what code you had as that would indicate if you needed an O2 or not, many O2 sensor codes do not mean the O2 is bad but rather it a condition the O2 sensor is picking up such as a vacuum leak and do not require the replacement of the O2.
@EricTheCarGuy I am having code P0420 and it maight be the bad CAT too. but, I want to change sensors for maintenance purpose since car is 10 years old. Also, I did sensor heater resistance test with a ohmmeter and couldn't get any reading. The car is running just fine but if there is a vacuum leak I should feel when I am driving, right??thanks..
@scyllis I'm thinking you did your test incorrectly. If your O2 was bad on that car it would set a code so your only replacing them because you want to. As for the P0420 get your hands on a scanner that gives you live data and compare the front O2 reading to the back, the back sensor should stay fairly constant around .5V while the front should switch quickly, if the rear also switches quickly and does not stay fairly constant then the cat is bad and should be replaced.
eric my 1997 mustang is idling high and when i run it long is starts this juking thing and it makes a huming sound it go's up and then the sound go's down like it cant breed then it cuts off please give me some input on this.
More efficient air fuel delivery? with a carb you read the plug and egt and hoping you get the jetting right it would be nice if the efi didnt it for you.
I was a Valvoline Oil change place and the Assistant Manager was telling a customer about a O2 sensor. I said to him a bad sensor can cause bad gas mileage and he was no is doesn't it just measures oxygen. I was like okay Mr know it all
you mention.. more than once.. the sensor produces voltage based on the difference between the oxygen inside the exhaust compared to the oxygen outside the exhaust..
does this mean there is a sensor monitoring the oxygen outside the exhaust ?
@frank0067 You might want to re-watch the video, the sensor is exposed to the inside AND the outside air, that is the purpose of those holes on the top of the sensor, there is not separate sensor it's all the same one.
@frank0067 The best source I've found for that is Alldata but you have to spend a little but it's worth it. Other than that it's a factory service manual.
@Itsmeeman1 It would not go into closed loop meaning that the computer would probably go into a 'limp in' or 'fail safe' mode and performance and gas mileage would be compromised as a result.
I went over every other possibility before coming to the conclusion that the jet needed increasing. I remember that when I first bought my car in the 1990s I could adjust the carburetor fine, but then when E10 moved in sometimes I could adjust the carb perfectly, and sometimes I'd have to turn the idle jet way out to get results, and I tried several carburetors with the same results. I also rebuilt the engine at about 100,000 miles, so guides, valves, seats, and rings were perfect.
@td1238 I think you hit on an important point and that is working on the car that your working on is more like an 'art' rather than an absolute which is what I consider working on modern cars to be. With the older engines and carburetors you had to work to get things right, now you just replace parts. Sounds like you know what your doing though. Thanks for your comments.
I actually came up with a formula for figuring out metering jets based on the viscosity and stoichiometric ratio for ethanol, when used at 10%, and the formula came out with a similar jet number, but in real life the amount of ethanol varies from 10% to less than 10%. The oxygen sensor helped me fine-tune everything so that I'd cruise and drive in the 80s, and when the enrichment jet kicked in the voltage would almost max out, but not quite or else I'd get sooty spark plugs.
I used an oxygen sensor because my car was running lean. It'd lurch and jump occasionally while cruising, and to make it idle well the idle screw had to be turned way past what the book recommended. I figured that this was because of the ethanol added to the gasoline, because ethanol has twice the viscosity of gasoline and less energy, so I increased my metering jet from a 51 to a 55 and now all is well. Vacuum readings weren't helpful because no matter what I did the car wouldn't run right.
Having said that, could there instead be some reference voltage in a modern car's ECU that combines with the O2 sensor voltage to get that .5 volts or something? So many people say that an O2 sensor measures whether an engine is lean or rich, but if it measure oxygen, all it can measure is if the engine is at or leaner than stoichiometric. It cannot measure a 'rich' condition, since it cannot measure gasoline or hydrocarbons.
@td1238 Actually it does measure rich by default, if you know the amount of O2 in the exhaust you know how the engine is burning. .5V would be ideal for a fuel injected car but carbureted cars will run richer, if you want to set your carbs do it with a vacuum gauge as that is a much better method than reading an O2 for a carbureted car as it's hard to get the adjustment right as you have found. It also has a lot to do with your cam and how the rest of the engine is set up.
I would like to know why everyone says that the ideal engine mixture gives a voltage around .5 volts. At stoichiometric, ideally all oxygen will be consumed. In reality most of it will be consumed. That would give a high voltage. I put an oxygen sensor in my 1951 Chevrolet. If I adjusted or jetted the carb for .5 volts, it ran like crap. It ran ideally with a voltage from .8 to .9. Over .9 the spark plugs became sooty. In that range, however, they looked great and the car ran great.
Hey Man i love your vids.I have my own garage and tryin to make extra cash helpin people with simple things like brakes rotors mufflers amongst other noob things. you r helpin me expand my knowledge and really appreciate it. O but i cant seem to find a vid for spark plugs. i am familiar with the process but i wanna c how you do it buddy.
@PigE911 to see if your spark plug is sparking just remove it fromt he cylinder with the coil still on it, put it in a safe place and get some one to watch it, then crank the engine , youll physically see the spark occuring at the gap, also a basic step is to change plugs at 150 000km depending on manufactor specs
@billywaltmon That's really not possible, it's much better to replace them as they get old and don't work as well, not as a result of getting dirty but rather as a result of getting old. Aside from that O2 sensors are very sensitive to solvents so you would probably do a lot more damage than good by cleaning them.
Hi Eric, Alex again this is exactly what I refered to in my previous comment. I can try to look for this information in a book or talk to a so called mechanic (I know there is plenty of good mechanics in the world but not so many in that part of the world that I like to call second home) and I have no clue what they are talking about. This is simple and straight forward more over it sticks!!!!!
I always wanted to take a course in car mechanics...I found it
Eric: do you have a video that deals with suspension work? What to check for and how to repair? I know you talked about wheelhub bearings...is there more? I would really appreciate this..shocks, springs, bushings etc..
@alexroufs I have a couple actually, in fact I have videos covering all the things you mentioned. I hope to better organize them into categories soon but for now you can just do a search for the video you are looking for with EricTheCarGuy before whatever your searching for in the search box at the top of every YT page.
i think this might be the problem with my Beretta. its been running really rich so i took it to a mechanic and he said it was being caused by a faulty ignition coil . so he replaced my ignition coils but its still running rich but it might just be caused by a faulty o2 sensor
@380gb Perhaps not, I would look for vacuum leaks first before replacing the sensor as they can cause the sensor to read incorrectly and make it run rich.
@founditnow54 Toyotas are famous for this, first I cut the wire and use a regular socket or the box end of a wrench not an O2 sensor socket, I normally use heat but there are still occasions where the threads become damaged during removal and require re-tapping.
so I got a new sensor and the car definately runs smoother, as for fuel economy its doing alot better but I havent been through a tank yet so im not sure
@Brendon00000 Yes the O2 sensor is the primary sensor used by the PCM to calculate the fuel mixture after warm up, often installing a new sensor will do all of the things you describe. Thanks for the comment.
I just read the fault codes on my acura cl and they came out with p0401, p0170 and p0171. Based on your video and all the discussions below can I call this to be an exhaust issue before looking over the 02 sensors or the MAF? I did clean my EGR port recently and have been hearing some "cracking" noise as I throttle during driving.
@ramrice That engine does not use a MAF so you can rule that out. The P0401 is an EGR flow problem, I know you mentioned you cleaned the EGR port but what you really need to do is clean each of the individual runners going into the intake, see the video I did on cleaning EGR passages. Start with this code and reset it to see if the other codes come back as they do not mean the O2 sensor is bad but rather it detects a problem with the fuel mix.
so its my cars 02 sensor that being a pain in the ass, my honda crx got 600kms to a tank last month, I put on a new exhaust and suddenly I get less than 200km to a tank, and it backfires a bit showing its obviously running rich, simple fix new sensor
nice vid man.. i have a audi 80 quattro b3 with the 2.0 16v 6a/9a engine.. i tested my o2 today when the car was warm and had been for some time.. the reading that i got bounced from 0-1 volt constantly and quite quickly.. is this ok.. it just seemed od to me. its cis-e motronic in case it matters
@nickernosher That is exactly what it should be doing, when they get old they tend to switch a lot slower and are less effective at maintaining optimum fuel ratios as a result.
@EricTheCarGuy Thank you Eric.. the reason why i said it seemed odd to me is that i planning on a few more intake mods. i have already installed better cams than stock.. and am soon goin to replace the head with a 1.8 kr head.. (larger inlets).. as motronic is a bit lean at the best of times i was goin to add a wideband plus air/fuel gauge, and moddify feuling through the dpr... sorry for going on but will a wide band give a steady/er reading on the gauge? excuse if i make no sense lol. ty again
@savuisai That doesn't sound like an O2 sensor problem but rather an oil control problem, I suspect it's the oil control rings. To fix it you will need to repair or replace the engine. A compression test will help confirm this, I've done a video on compression testing if that helps.
Hi, I did a full tune up on my 03 Grand caravan i changed my oil from conventional oil to mobil 1 synthetic and i change all the sprak plugs to nascar advantage and all plug wires are champion and the oil filter and the airfilter are fram the van runs fine and everything but it uses a lot of fuel it uses 11.9 mpg or 19.7 l to 100 km could you please tell me why ? Thank you
@desisandhuman It's hard to say without getting a look at it for myself but if it occurred after you put those plugs in you might consider putting the OE back in just to check if that makes a difference. Using performance parts in a non performance application is often not the best way to go in my experience especially on newer engines.
hi Eric ! i just want to ask because i have a problem with my oxygen sensor code P0140 "Sensor Circuit No Activity Detected (Bank 1 Sensor 2)", if i replace my oxygen sensor downstream would it be fix my CEL? or MIL?
@michaelmonsod It is most likely the sensor but it could also be a wiring problem. I like to verify it's operation or non-operation before I replace a sensor, a quick look on a scan tool is all that I usually need.
Great job! probably the best vid on O2 sensor out there :) i have a question tho, what is the difference between PRE and POST cat o2. and how can the Post sensor be important for fuel economy when it measurs cat afficiency only...?
@jambe1234567 There is no physical difference in the sensors and you are correct it's only purpose is to monitor catalytic converter efficiency which was mandated as part of OBDII. It has nothing to do with fuel economy but if you suspect a bad cat you can compare the 2 readings and see how the cat is doing, if they read about the same then the cat is bad, if the post sensor remains around .5V then the cat is working fine.
@EricTheCarGuy the reason why im asking is because my car failed Etest
and on the scan tool it reads zero for the post cat o2 Sensor. everyone (even mechanics) is telling me that is the most important o2 senosor on the car and i must change it to pass etest. its also more expenseive then the pre cat o2
@jambe1234567 I wouldn't say it's the most important O2 sensor on the car but it's probably more expensive because it has a longer wiring harness which would drive up the cost of materials to make the part. It will need to function to pass an emissions test regardless.
@jambe1234567 It monitors catalytic converter efficiency which is an integral part of the emissions system and if your going to pass an emissions test all systems need to function as designed.
i have BMW 316I M43 1994 I removed catalytic converter and o2 sensor. o2 sensor is located before the catalytic converter. if i will install new o2 sensor will it work will it make fuel economy???? pls answer :)
@IDONTKNOWIT21 Probably one of the most important sensors on the car is the O2 sensor as far as fuel mixture is concerned so yes you need it for good fuel economy. If you run it without a cat however you will still have a check engine light however not to mention it would fail an emissions test.
@EricTheCarGuy instead of cat i installed just a pipe cat was damaged and the sensor too. when sensor was connected car worked very bad when i disconnected it car started to work but it needs 2 litre more fuel for 100km. i just want to know if i will install new o2 sensor will it have normal fuel consumption without cat? (sensor is located before the cat)
Somehow I missed this one, great intro, waiting for more like this. It's intriguing but a little disconcerting to learn that a person could have a bad O2 sensor causing poor gas mileage but no codes. And it's also unfortunate to learn that to properly check out a sensor you need a labscope. How often does it happen with no codes?
@spelunkerd Before OBDII this was the case however the newer sensors are much more accurate and with faster ECU's it's easy to see if a sensor is not performing correctly. In fact before OBDII it was common practice to replace an O2 after about 60K as part of a "tune up". You really don't need a lab scope to check them however just a good DVOM.
can you please tell me how to increase or decrease the voltage from the o2 sensor to fool the computer into making the injectors sending less fuel to the normal oxygen ratio?? dont worry, its for a good cause and you wont be blamed for any damage done to my engine after installation if there is any. i do have a back up car, the ford explorer i have is the experimental vehicle.
@francisco8036 Not exactly, keep those little holes in the top of the sensor away from grease or other contaminants especially silicone as that will damage the sensor.
Sorry, Eric: I thought that "lean" meant there was too little fuel, resulting in an unexpectedly low O2 level at the sensor, whereas "rich" meant there was too MUCH fuel; so much, in fact, that it couldn't possibly all be burnt, resulting in a high O2 level at the sensor. Also, how does the sensor determine the amount of O2 OUTSIDE the exhaust? Does it get a signal from another sensor, or is that comparison done by the computer? Thanks, and nice videos.
@chackers Lean is not enough fuel OR too much air, rich is just the opposite. The sensor has 2 parts, one exposed to the outside atmosphere (those little holes around the top by the wire) and the other end is placed in the exhaust stream. The bigger the difference in O2 between the outside air and the air inside the exhaust the greater the voltage produced by the sensor, in short, rich means (less O2 in the exhaust) voltage close to 1V and lean means a lower voltage is produced closer to 0V.
@chackers Lean could mean not enough fuel or too much air. Rich could mean too much fuel or not enough air. It just depends on how you want to look at it.
Hay what's up Eric, what I want to know is , I had my truck tuned up a week ago, It's a 1999 GMC yukon, it ran fine for a few days, now when I stop and then start to pull off
it stalls but it don't shut off it shakes bad and feels like it's about to shut off, my check eng. light came on a few weeks before I had the tune up, the shop reset it and said I needed a tune up, don't really want to take it back without some help, one mech. said that they may not have replaced my wires or my rota cap
@cwilkins318 Misses under load are often the result of an ignition problem but not always. If you have a check engine light on then that is where you should start with your diagnosis, pull the code and follow the trouble shooting for that code, once you have done that check to see if the problem is still there, if it is then perhaps check the wires and the rest of the ignition system. Good luck.
Damn it you did it again! I just got a check engine light...I recently used gook to clean my motor...didnt cover my o2 sensor ><...and my car has been showing some black smoke. I drive a 91 Eagle Talon Tsi show me some videos on that!!
@tigerhorns The black smoke may have nothing to do with the O2 sensor, in fact it could be something else altogether. If you have a check engine light for an O2 then I might pursue that but it could just as easily be an ignition problem or some other electrical issue. I'm not a fan of cleaning engines as I've seen lots of problems pop up similar to yours after cleaning.
i bought an a/f ratio gauge by sunpro my mixture reads lean and after replacing both upstream and down o2 sensors it still reads lean if anything could you give me every possible idea what could be wrong? i have a 99 ford zx2 the gauge should sway as i give it gas it just stays at lean any help would be appreciated and its not how my gauge is hooked up
@krazy8tattoos Sorry, I just don't have the space here to go into all the intricacies of the combustion process, stay tuned for future videos. BTW it might be that nothing is wrong and that's the way the engine runs.
i bought an a/f ratio gauge by sunpro my mixture read lean and after replacing both upstream and down o2 sensors it still reads leans if anything could you give me every possible idea what could be wrong? i have a 99 ford zx2 the gauge should sway as i give it gas it just stays at lean any help would be appreciated
Hi thanks for this video ,I have problem with the fuel in my car it spend(burns) more than normal gas but I don't have the check engine light on yet I took it to the dealership they told me I might be the O2 sensors or the catalytic converter my car is 2002 Hyundai sonata 2.4 so do you think it's happened without the check engine light on or the guy who i bought from turned it off
@MyHurtlocker If it's a 2002 it would set a code for a bad O2 if it was bad. You might want to look elsewhere for the problem, I would start by hooking it up to a scanner and reading the data that the computer sees to look for any anomalies that might indicate the problem. Any good technician should be able to do this.
My check engine light is on and is giving the code for lean running in both banks. It also has a "loping" idle and rough starts. Does this sound like the O2 sensor to you? Also if it does how do I know which sensor is bad since most cars has more than one?
@Drudy90 Lean codes are almost never the O2 sensor. It's usually an engine performance problem such as a vacuum leak or sometimes an exhaust leak. You might benefit from the video I did on "Power Balance Testing" too as well as finding a vacuum leak.
is the Oxygen Sensor cleanable? Just like cleaning the Maf Sensor?
OhMyNins 2 weeks ago
This has been flagged as spam show
check out my save money on fuel with one wire vid.
jocell202 3 weeks ago
omg thanks for helping me with my assignment!
eforty6318 3 weeks ago
hey eric, thanx for helping me pass my mid term!
jiujitsukiller9 1 month ago
thanks.
mrbeereal247 1 month ago
Hi there, I have an important question, if you remove the catalytic converter and do this
/watch?v=KnYUHwTxKkE&list=FLcHBwmz_KHTMGraOeJcRC_A&index=3&feature=plpp_video
and the engine light will go off, is this also bad? even if the engine light is off? tnx
Supralover79 1 month ago
CAN YOU PLEASE TELL OR SHOW US HOW TO CHECK HEATED O2 SENSORS, IM HAVING A PROBLEM WITH MY S2000 WHENVER MY ENGINE WARMS UP AND ACCELERATE ON THE HIGHWAY MY THROTLLE DOESNT RESPOND ITS LIKE THERE IS NO POWER BUT IF I PRESS IT DOWN SLOWLY IT WILL PICK UP, I REPLACED SPARKPLUGS,IGNITION COIL,MAPSENSOR AND TPS SENSOR,
PrinceNeoLloyd 1 month ago
@PrinceNeoLloyd If you can't find problem on your own, take it to the repair shop, they find you the problem and you replace the part yourself. This way you save money when not replacing parts by quessing.
bujashaka 2 days ago
My check light is on but the dash light does not come on and it's not the bulb could it be bad wires plezz help
bugz742 1 month ago
i have long tube headers and no cats and the sensor on the driver side closest to the engine is going out does it still need the sensor please help
judastadeo32 2 months ago
@judastadeo32 Yes u need to get a new one if its going out. what codes do u have?
camarooutsider 2 months ago
Plz tell me, Does Suzuki fx 800cc (1987 model) has this sensor???
MrYourama 2 months ago
@MrYourama I think so yes.
EricTheCarGuy 2 months ago
(2of2) my heck engine light is on> code is:po420 (bad cat?)
thanks for ready and apprieciate all pointers.
EncinitasLokal 2 months ago
@EncinitasLokal That is what the code is for but check the O2 sensor readings to make sure that it's not an O2 sensor problem.
EricTheCarGuy 2 months ago
2002>celica gt automatic> 1/10 times example: say i am driving on the freeway and i decide to open the throttle but car doesnt reply.> rpms go up, until i eas off the throttle and press it down slowly, it will pick up and go. i can down shift ;rom 'd' to '2' with no problem, so i doubt im having transmission problems?
joey from oceanside,ca
EncinitasLokal 2 months ago
@EncinitasLokal Actually that does sound like it might be transmission related if I read you correctly.
EricTheCarGuy 2 months ago
IAM wondering how can i tell which wire is from the ecu and to the ecu for the sensor signal .. on my sensor diagram it says pink and black is power and ground ..then there is tan and purple the signal wires.. but which is come and which going
my van is 1998 chevy venture 3.4 L V6
frank0067 3 months ago
@frank0067 Those are for the heater which I hope to cover in future videos, only 1 wire will be the signal wire and to be honest the best way to see it is with a scan tool because you can check it while sitting in the drivers seat. Scan tools that show live data are pretty affordable these days.
EricTheCarGuy 2 months ago
Great video explaining how everything works! I have a 92 Accord EX and it has a check engine light code 41 for a oxygen sensor heater problem and i wanted to replace the sensor...only problem is I dont know where it is and none of the videos on youtube really help since they're for gms and apparently my car only has one sensor rather than pre-cat and post cat, since i've seen a couple videos of yours with cb7s,did you know where the sensor may be or maybe even have a picture of it in the car?
Sanjeai 3 months ago
@Sanjeai Yes it should be located in the 'A' pipe just off of the engine before the cat, it might be in the manifold however I don't remember exactly, look in the exhaust as close to the engine as you can for what looks like a spark plug with wires coming out of it. When you find it to remove it I would cut the wires off of the sensor and use a 7/8 socket or box wrench to remove it rather than trying to remove it with an O2 sensor socket. Good luck.
EricTheCarGuy 3 months ago
AWESOME FUCKINNNNGGGG VIDEO! thankss Eric! :)
JFIdelH 4 months ago
@JFIdelH Thank you!
EricTheCarGuy 3 months ago
HELP! i have a 2002 s10 2.2 . about 2 weeks ago it made a strange sound when starting then . bucked like crazy til lit warmed up. but now bucks like crazy all the time and smell of un burnt gas out exhaust . cant drive it. i checked tps. map. and a new temp sensor or water temp. . there is no egr on this model they say. no water in tank, and fuel is pumping. On the gas filter the one line on gas filter i cant pump fuel thru , but i can thru center lines of filter. and has new plugs
sxr951 4 months ago
@sxr951 You might start by pulling any codes stored in the computer, if you don't have any codes go for the general tune up stuff and check the mechanical condition of the engine. Don't just blindly replace parts as that gets expensive.
EricTheCarGuy 4 months ago
So I have an older truck (1999, GMC, Suburban). There were no engine lights going off but my question is, even though the computer dose not say my O2 sensors are bad will it help the performances of the engine if I change them anyways? I mean will it help the performances a great deal? At that these things aren’t cheap... is there a way to clean them?
bw110719 4 months ago
@bw110719 I'm not sure you will have any real gain from just replacing them but it can't hurt, I think the most you will notice is slightly better fuel economy. If your looking to get more performance start with the basics like a good tune up.
EricTheCarGuy 4 months ago
Thanks for all the great videos. I would like to mention that the optimum O2 sensor signal is not 0.5V, but instead swings from below 0,2V to above 0.9V. This is required such that both catalysts are functional within the catalytic converter. One catalyst only works below 14.7:1 AFR and the other only works above 14.7:1 AFR. This is a minor yet very important point. Many falsely believe that the computer just can't keep up and hence the swing. Actually the swing is for proper cat operation.
lwgraves 4 months ago
@lwgraves I see where your going with your statement however I stand by my statements because this is a video covering the basics of O2 sensor operation NOT AFR sensors or any specifics of either. Thanks for your input.
EricTheCarGuy 4 months ago
Why do ppl cut them off and say they get great MPG? cud someone explain this this stupid method i see ppl doing on honda's.
weewoodeal 4 months ago
@weewoodeal Well lets just say that they have no idea what they are talking about and are probably full of hot air.
EricTheCarGuy 4 months ago
Funny thing is I have a bad bank 1 sensor (heat circuit) I ordered a new one but I am getting fantastic fuel economy
DSchruteBeets 4 months ago
@DSchruteBeets The O2 is still good but the heater that is designed to bring the sensor up to temp has failed, this will make it so that it takes longer for the sensor to warm up but it will still work when it does.
EricTheCarGuy 4 months ago
I think I finally spotted that riff at the beginning. Sounds like "I'm Broken" -Pantera-
Wildfowler85 5 months ago
ok ty
pCneter 6 months ago
Eric question... My new Honda is throwing a bank 2 O2 sensor code. I believe PO141 was the code..well I'm sure that's the code bcz according to my Honda shop manual cd ck'ing the 3/4 sensor leads with my ohmmeter it did not register in comparison with the pre-cat 02 that had 12Ohm...so my senses tell me to replace bank 2 downstream...thoughts? 65$ denso...
tiker646 6 months ago
@tiker646 Given that is a code for the heater circuit I would say you would be safe in replacing that sensor.
EricTheCarGuy 6 months ago
how du i become 1
pCneter 6 months ago
@pCneter You need to apply and YT needs to accept you into their partner program, it can take a while, it took me about a year and a half.
EricTheCarGuy 6 months ago
This has been flagged as spam show
u no at the left upper side above you vid is an pic whit eric the car guy but how did u get that pic there i csnt viger it out
pCneter 6 months ago
u no at the richt upper side above you vid is an pic whit eric the car guy but how did u get that pic there i csnt viger it out
pCneter 6 months ago
@pCneter You have to be a YT partner to have that option.
EricTheCarGuy 6 months ago
HEY HOW DID U THAT PIQTURE ERIC TEH GARGUY PICK INSTAD OF THE TEXT HOW DID U CHANGED THAT ?
pCneter 6 months ago
@pCneter I used motion graphic software to create the animation in this video if that's what your asking.
EricTheCarGuy 6 months ago
If you wanted to clean the sensors cleaning the outside will achieve nothing is there a way the clean the sensor which is under the metal casing maybe with carb cleaner or injector cleaner to remove deposits?
welshfluteplayer 6 months ago
@welshfluteplayer NEVER attempt to clean an O2 sensor you can ruin it. It's much better to replace them should you suspect a problem.
EricTheCarGuy 6 months ago
@EricTheCarGuy hey eric thanks for all your help man i really appreciate it. do you think you could do a video on how to read your smog check paperwork as far as knowing what repairs need to be made according to the test results. unless you already made one but i havent found yet, any help would be greatly appreciated. thanks again.
vulgarcowpower 6 months ago
Hi Eric I Have 98 Corolla 02 Sensors Are Gone. I Found Them To Be Very Cheap On Amazon.com they are denso. dealer told me sensors have to be original toyota specific sensors and they are denso too, just at dealer sensors are million dollar each. So My Question Is What do you think, should I go for Amazon or Dealer Sensors? Thanks I Like You Work You Help All Of Us A Lot....
winston0079 6 months ago
@winston0079 If they are Denso sensors I would go for the Amazon ones.
EricTheCarGuy 6 months ago
good video
wirsindheldenowns 6 months ago
Hi man!! may i know what is the material that alter the sensor output??
hydraz06 7 months ago
@hydraz06 Not sure really but it reacts with O2 and produces voltage based on the amount it's exposed to.
EricTheCarGuy 7 months ago
@hydraz06 i think its zirconium,or something similar,and works like a backwards bulb,if that makes any sense!
TrueBlueEG8 6 months ago
say i am running my car without Cats and i have the ebay Extended Bung for the O2 sensors...how will this affect my A/F ratio?
ir1337zor 8 months ago
@ir1337zor I recommend getting the sensors into the stream as they will read better that way. I don't recommend running without a cat however. You will probably get a code P0420 but you can ignore it since your not running a cat.
EricTheCarGuy 7 months ago
@EricTheCarGuy Hi Eric, I have 01 camry, how will I know bank 1,sensor 1 is which one, Oxygen or A/F sensor? I thought to look original one on the car but I've been told they replaced a year ago. Maybe they installed the wrong one in the first place. The prices between O2 and A/F sensor are very different. If I put O2, will it be ok? or do I have to install A/F? Pls help...
scyllis 7 months ago
@scyllis Bank 1 is always the bank with #1 cylinder, see the compression testing video I did for specifics. You didn't mention what code you had as that would indicate if you needed an O2 or not, many O2 sensor codes do not mean the O2 is bad but rather it a condition the O2 sensor is picking up such as a vacuum leak and do not require the replacement of the O2.
EricTheCarGuy 7 months ago
@EricTheCarGuy I am having code P0420 and it maight be the bad CAT too. but, I want to change sensors for maintenance purpose since car is 10 years old. Also, I did sensor heater resistance test with a ohmmeter and couldn't get any reading. The car is running just fine but if there is a vacuum leak I should feel when I am driving, right??thanks..
scyllis 7 months ago
@scyllis I'm thinking you did your test incorrectly. If your O2 was bad on that car it would set a code so your only replacing them because you want to. As for the P0420 get your hands on a scanner that gives you live data and compare the front O2 reading to the back, the back sensor should stay fairly constant around .5V while the front should switch quickly, if the rear also switches quickly and does not stay fairly constant then the cat is bad and should be replaced.
EricTheCarGuy 7 months ago
eric my 1997 mustang is idling high and when i run it long is starts this juking thing and it makes a huming sound it go's up and then the sound go's down like it cant breed then it cuts off please give me some input on this.
MrPoloboy25 8 months ago
@MrPoloboy25 I would be checking the operation of the IAC valve as well as look for vacuum leaks just to be on the safe side.
EricTheCarGuy 8 months ago
Eric, that yellow balloon guy is a bit TOO happy to have an O2 sensor up his arse...
KaldekBoch 8 months ago
@KaldekBoch My videos are full of happy people, I don't explain why, they just are. Thanks for the comment.
EricTheCarGuy 8 months ago
@EricTheCarGuy Ooookayyyy..... 0_o Seriously though, love your work mate - keep it up.
KaldekBoch 8 months ago
More efficient air fuel delivery? with a carb you read the plug and egt and hoping you get the jetting right it would be nice if the efi didnt it for you.
frenchokie 8 months ago
@frenchokie You get more power out of a carb at least if it's set up right. Thanks for the comment.
EricTheCarGuy 8 months ago
I am thinking about using efi on a racing two stroke engine. Do you think the oil in the mixed fuel I use would have any effect on the o2 sensor?
frenchokie 8 months ago
@frenchokie Yes, O2's are very sensitive and would probably foul if you ran oil past it like that, besides what good would it be for that engine?
EricTheCarGuy 8 months ago
Comment removed
itsmesomeguy 8 months ago
I was a Valvoline Oil change place and the Assistant Manager was telling a customer about a O2 sensor. I said to him a bad sensor can cause bad gas mileage and he was no is doesn't it just measures oxygen. I was like okay Mr know it all
bartsimpsonhotrod 9 months ago
you mention.. more than once.. the sensor produces voltage based on the difference between the oxygen inside the exhaust compared to the oxygen outside the exhaust..
does this mean there is a sensor monitoring the oxygen outside the exhaust ?
frank0067 9 months ago
@frank0067 You might want to re-watch the video, the sensor is exposed to the inside AND the outside air, that is the purpose of those holes on the top of the sensor, there is not separate sensor it's all the same one.
EricTheCarGuy 9 months ago
@EricTheCarGuy ok gotcha now, didnt get that part from video but i understand what your saying.
BTW how can i get a wiring diagram for ECU of 1998 chevy venture 3.4L
I am trying to identify the colors and spots on the ECU for both O2 sensors wiring.
frank0067 9 months ago
@frank0067 The best source I've found for that is Alldata but you have to spend a little but it's worth it. Other than that it's a factory service manual.
EricTheCarGuy 9 months ago
@EricTheCarGuy what would happen if you just disconnected the O2 sensor? Would the car then run so lean that it would stall?
Itsmeeman1 9 months ago
@Itsmeeman1 It would not go into closed loop meaning that the computer would probably go into a 'limp in' or 'fail safe' mode and performance and gas mileage would be compromised as a result.
EricTheCarGuy 9 months ago
I went over every other possibility before coming to the conclusion that the jet needed increasing. I remember that when I first bought my car in the 1990s I could adjust the carburetor fine, but then when E10 moved in sometimes I could adjust the carb perfectly, and sometimes I'd have to turn the idle jet way out to get results, and I tried several carburetors with the same results. I also rebuilt the engine at about 100,000 miles, so guides, valves, seats, and rings were perfect.
td1238 10 months ago
@td1238 I think you hit on an important point and that is working on the car that your working on is more like an 'art' rather than an absolute which is what I consider working on modern cars to be. With the older engines and carburetors you had to work to get things right, now you just replace parts. Sounds like you know what your doing though. Thanks for your comments.
EricTheCarGuy 10 months ago
I actually came up with a formula for figuring out metering jets based on the viscosity and stoichiometric ratio for ethanol, when used at 10%, and the formula came out with a similar jet number, but in real life the amount of ethanol varies from 10% to less than 10%. The oxygen sensor helped me fine-tune everything so that I'd cruise and drive in the 80s, and when the enrichment jet kicked in the voltage would almost max out, but not quite or else I'd get sooty spark plugs.
td1238 10 months ago
I used an oxygen sensor because my car was running lean. It'd lurch and jump occasionally while cruising, and to make it idle well the idle screw had to be turned way past what the book recommended. I figured that this was because of the ethanol added to the gasoline, because ethanol has twice the viscosity of gasoline and less energy, so I increased my metering jet from a 51 to a 55 and now all is well. Vacuum readings weren't helpful because no matter what I did the car wouldn't run right.
td1238 10 months ago
Having said that, could there instead be some reference voltage in a modern car's ECU that combines with the O2 sensor voltage to get that .5 volts or something? So many people say that an O2 sensor measures whether an engine is lean or rich, but if it measure oxygen, all it can measure is if the engine is at or leaner than stoichiometric. It cannot measure a 'rich' condition, since it cannot measure gasoline or hydrocarbons.
td1238 10 months ago
@td1238 Actually it does measure rich by default, if you know the amount of O2 in the exhaust you know how the engine is burning. .5V would be ideal for a fuel injected car but carbureted cars will run richer, if you want to set your carbs do it with a vacuum gauge as that is a much better method than reading an O2 for a carbureted car as it's hard to get the adjustment right as you have found. It also has a lot to do with your cam and how the rest of the engine is set up.
EricTheCarGuy 10 months ago
I would like to know why everyone says that the ideal engine mixture gives a voltage around .5 volts. At stoichiometric, ideally all oxygen will be consumed. In reality most of it will be consumed. That would give a high voltage. I put an oxygen sensor in my 1951 Chevrolet. If I adjusted or jetted the carb for .5 volts, it ran like crap. It ran ideally with a voltage from .8 to .9. Over .9 the spark plugs became sooty. In that range, however, they looked great and the car ran great.
td1238 10 months ago
bad ass. that completely helped.
SICKSxNINE 10 months ago
@SICKSxNINE Glad to help, thanks for the comment.
EricTheCarGuy 10 months ago
Hey Man i love your vids.I have my own garage and tryin to make extra cash helpin people with simple things like brakes rotors mufflers amongst other noob things. you r helpin me expand my knowledge and really appreciate it. O but i cant seem to find a vid for spark plugs. i am familiar with the process but i wanna c how you do it buddy.
PigE911 11 months ago
@PigE911 Thanks for the comment. What exactly were you looking to find out about with spark plugs?
EricTheCarGuy 11 months ago
@PigE911 to see if your spark plug is sparking just remove it fromt he cylinder with the coil still on it, put it in a safe place and get some one to watch it, then crank the engine , youll physically see the spark occuring at the gap, also a basic step is to change plugs at 150 000km depending on manufactor specs
gberland 10 months ago
Can you please make a video going over MAP sensors and other related sensors in the intake. I would like to understand these fully. Thanks pal!
sonicthehedgehogca 11 months ago
@sonicthehedgehogca I actually plan to do an entire series on emission controls and their function at some point.
EricTheCarGuy 11 months ago
@EricTheCarGuy Thanks the map sensors and other can be confusing for some. As well as things like the TPS.
sonicthehedgehogca 11 months ago
Can you clean the O2 sensor with some type of spray cleanner instead of replaceing it? Thanks - Billy
billywaltmon 11 months ago
@billywaltmon That's really not possible, it's much better to replace them as they get old and don't work as well, not as a result of getting dirty but rather as a result of getting old. Aside from that O2 sensors are very sensitive to solvents so you would probably do a lot more damage than good by cleaning them.
EricTheCarGuy 11 months ago
Hi Eric, Alex again this is exactly what I refered to in my previous comment. I can try to look for this information in a book or talk to a so called mechanic (I know there is plenty of good mechanics in the world but not so many in that part of the world that I like to call second home) and I have no clue what they are talking about. This is simple and straight forward more over it sticks!!!!!
I always wanted to take a course in car mechanics...I found it
alexroufs 11 months ago
@alexroufs I'm glad to help. I really appreciate your comment as I work pretty hard at making my videos worth watching, thanks.
EricTheCarGuy 11 months ago
Eric: do you have a video that deals with suspension work? What to check for and how to repair? I know you talked about wheelhub bearings...is there more? I would really appreciate this..shocks, springs, bushings etc..
Thx a ton for your replies. Alex
alexroufs 11 months ago
@alexroufs I have a couple actually, in fact I have videos covering all the things you mentioned. I hope to better organize them into categories soon but for now you can just do a search for the video you are looking for with EricTheCarGuy before whatever your searching for in the search box at the top of every YT page.
EricTheCarGuy 11 months ago
i think this might be the problem with my Beretta. its been running really rich so i took it to a mechanic and he said it was being caused by a faulty ignition coil . so he replaced my ignition coils but its still running rich but it might just be caused by a faulty o2 sensor
380gb 11 months ago
@380gb Perhaps not, I would look for vacuum leaks first before replacing the sensor as they can cause the sensor to read incorrectly and make it run rich.
EricTheCarGuy 11 months ago
so if the yellow ball character farted, it would detect the how rich the mixture was.
OtherVincentLee 1 year ago
@OtherVincentLee Actually yes as the O2 would be displaced by the methane thus indicating a rich condition.
EricTheCarGuy 1 year ago
wow! niiiice..
DonMecanico 1 year ago
@DonMecanico Thank you.
EricTheCarGuy 1 year ago
Eric - what is your trick to remove an o2 sensor thats being very stubborn? Anti-seize, heat, etc?
founditnow54 1 year ago
@founditnow54 Toyotas are famous for this, first I cut the wire and use a regular socket or the box end of a wrench not an O2 sensor socket, I normally use heat but there are still occasions where the threads become damaged during removal and require re-tapping.
EricTheCarGuy 1 year ago
so I got a new sensor and the car definately runs smoother, as for fuel economy its doing alot better but I havent been through a tank yet so im not sure
Brendon00000 1 year ago
@Brendon00000 Yes the O2 sensor is the primary sensor used by the PCM to calculate the fuel mixture after warm up, often installing a new sensor will do all of the things you describe. Thanks for the comment.
EricTheCarGuy 1 year ago
Thanks again Eric for your education.
I just read the fault codes on my acura cl and they came out with p0401, p0170 and p0171. Based on your video and all the discussions below can I call this to be an exhaust issue before looking over the 02 sensors or the MAF? I did clean my EGR port recently and have been hearing some "cracking" noise as I throttle during driving.
ramrice 1 year ago
@ramrice That engine does not use a MAF so you can rule that out. The P0401 is an EGR flow problem, I know you mentioned you cleaned the EGR port but what you really need to do is clean each of the individual runners going into the intake, see the video I did on cleaning EGR passages. Start with this code and reset it to see if the other codes come back as they do not mean the O2 sensor is bad but rather it detects a problem with the fuel mix.
EricTheCarGuy 1 year ago
so its my cars 02 sensor that being a pain in the ass, my honda crx got 600kms to a tank last month, I put on a new exhaust and suddenly I get less than 200km to a tank, and it backfires a bit showing its obviously running rich, simple fix new sensor
Brendon00000 1 year ago
@Brendon00000 Did the sensor actually fix it or was there some other problem that was causing the mixture to be wrong?
EricTheCarGuy 1 year ago
nice vid man.. i have a audi 80 quattro b3 with the 2.0 16v 6a/9a engine.. i tested my o2 today when the car was warm and had been for some time.. the reading that i got bounced from 0-1 volt constantly and quite quickly.. is this ok.. it just seemed od to me. its cis-e motronic in case it matters
nickernosher 1 year ago
@nickernosher That is exactly what it should be doing, when they get old they tend to switch a lot slower and are less effective at maintaining optimum fuel ratios as a result.
EricTheCarGuy 1 year ago
@EricTheCarGuy Thank you Eric.. the reason why i said it seemed odd to me is that i planning on a few more intake mods. i have already installed better cams than stock.. and am soon goin to replace the head with a 1.8 kr head.. (larger inlets).. as motronic is a bit lean at the best of times i was goin to add a wideband plus air/fuel gauge, and moddify feuling through the dpr... sorry for going on but will a wide band give a steady/er reading on the gauge? excuse if i make no sense lol. ty again
nickernosher 1 year ago
@nickernosher Your not really looking for a steady reading from an O2 as it should switch back and forth rapidly if working properly.
EricTheCarGuy 1 year ago
@EricTheCarGuy cheers eric all cleared up now thanks for your help and great vids..
nickernosher 1 year ago
thanks for all your help and suggestions. we need more honest mechanics like you...
ericsinct 1 year ago
@ericsinct Thank you!
EricTheCarGuy 1 year ago
eric , i have a mazda 323 ba from 94' with bad Valve gaskets (smokes when cold outside a blu'ish smoke 1 minute , and after that no smoke) .
Now the question : O2 sensor might be afected by this problem? And the mileage
Thanx.
savuisai 1 year ago
@savuisai That doesn't sound like an O2 sensor problem but rather an oil control problem, I suspect it's the oil control rings. To fix it you will need to repair or replace the engine. A compression test will help confirm this, I've done a video on compression testing if that helps.
EricTheCarGuy 1 year ago
Hi, I did a full tune up on my 03 Grand caravan i changed my oil from conventional oil to mobil 1 synthetic and i change all the sprak plugs to nascar advantage and all plug wires are champion and the oil filter and the airfilter are fram the van runs fine and everything but it uses a lot of fuel it uses 11.9 mpg or 19.7 l to 100 km could you please tell me why ? Thank you
desisandhuman 1 year ago
@desisandhuman It's hard to say without getting a look at it for myself but if it occurred after you put those plugs in you might consider putting the OE back in just to check if that makes a difference. Using performance parts in a non performance application is often not the best way to go in my experience especially on newer engines.
EricTheCarGuy 1 year ago
cool
hp11208 1 year ago
Awesome vid cheers..wondering however do I needa disconnect my battery terminals before commencing changeover?
howhypa 1 year ago
P.s really saved me a lot of money!
michaelmonsod 1 year ago
@michaelmonsod That is probably my favorite thing in the world right now, helping people save money. Thanks for the comment.
EricTheCarGuy 1 year ago
Thanks Eric for the reply! I already replace both oxygen sensor sensor 1 & 2, CEL is gone, and i did what you said THANKS AGAIN ERIC!
michaelmonsod 1 year ago
hi Eric ! i just want to ask because i have a problem with my oxygen sensor code P0140 "Sensor Circuit No Activity Detected (Bank 1 Sensor 2)", if i replace my oxygen sensor downstream would it be fix my CEL? or MIL?
Thanks ERIC !
michaelmonsod 1 year ago
@michaelmonsod It is most likely the sensor but it could also be a wiring problem. I like to verify it's operation or non-operation before I replace a sensor, a quick look on a scan tool is all that I usually need.
EricTheCarGuy 1 year ago
Great job! probably the best vid on O2 sensor out there :) i have a question tho, what is the difference between PRE and POST cat o2. and how can the Post sensor be important for fuel economy when it measurs cat afficiency only...?
thanks
jambe1234567 1 year ago
@jambe1234567 There is no physical difference in the sensors and you are correct it's only purpose is to monitor catalytic converter efficiency which was mandated as part of OBDII. It has nothing to do with fuel economy but if you suspect a bad cat you can compare the 2 readings and see how the cat is doing, if they read about the same then the cat is bad, if the post sensor remains around .5V then the cat is working fine.
EricTheCarGuy 1 year ago
@EricTheCarGuy the reason why im asking is because my car failed Etest
and on the scan tool it reads zero for the post cat o2 Sensor. everyone (even mechanics) is telling me that is the most important o2 senosor on the car and i must change it to pass etest. its also more expenseive then the pre cat o2
jambe1234567 1 year ago
@jambe1234567 I wouldn't say it's the most important O2 sensor on the car but it's probably more expensive because it has a longer wiring harness which would drive up the cost of materials to make the part. It will need to function to pass an emissions test regardless.
EricTheCarGuy 1 year ago
@EricTheCarGuy but why would that (#2) o2 sensor need to work to pass etest
if the catalytic is working?
jambe1234567 1 year ago
@jambe1234567 It monitors catalytic converter efficiency which is an integral part of the emissions system and if your going to pass an emissions test all systems need to function as designed.
EricTheCarGuy 1 year ago
i have BMW 316I M43 1994 I removed catalytic converter and o2 sensor. o2 sensor is located before the catalytic converter. if i will install new o2 sensor will it work will it make fuel economy???? pls answer :)
IDONTKNOWIT21 1 year ago
@IDONTKNOWIT21 Probably one of the most important sensors on the car is the O2 sensor as far as fuel mixture is concerned so yes you need it for good fuel economy. If you run it without a cat however you will still have a check engine light however not to mention it would fail an emissions test.
EricTheCarGuy 1 year ago
@EricTheCarGuy instead of cat i installed just a pipe cat was damaged and the sensor too. when sensor was connected car worked very bad when i disconnected it car started to work but it needs 2 litre more fuel for 100km. i just want to know if i will install new o2 sensor will it have normal fuel consumption without cat? (sensor is located before the cat)
IDONTKNOWIT21 1 year ago
Somehow I missed this one, great intro, waiting for more like this. It's intriguing but a little disconcerting to learn that a person could have a bad O2 sensor causing poor gas mileage but no codes. And it's also unfortunate to learn that to properly check out a sensor you need a labscope. How often does it happen with no codes?
spelunkerd 1 year ago
@spelunkerd Before OBDII this was the case however the newer sensors are much more accurate and with faster ECU's it's easy to see if a sensor is not performing correctly. In fact before OBDII it was common practice to replace an O2 after about 60K as part of a "tune up". You really don't need a lab scope to check them however just a good DVOM.
EricTheCarGuy 1 year ago
can you please tell me how to increase or decrease the voltage from the o2 sensor to fool the computer into making the injectors sending less fuel to the normal oxygen ratio?? dont worry, its for a good cause and you wont be blamed for any damage done to my engine after installation if there is any. i do have a back up car, the ford explorer i have is the experimental vehicle.
bikr1975 1 year ago
@bikr1975 I would google that as there are "devices" out there.
EricTheCarGuy 1 year ago
Why does higher octane such as racing fuel damage the o2 sensor?
AirCrashMayday 1 year ago
@AirCrashMayday It doesn't however if you run methyl alcohol past it it might.
EricTheCarGuy 1 year ago
@EricTheCarGuy eric is there a differeces in a/f sensor and o2 sensor
NEmuddbogging 1 year ago
wow great vid, thanks
mayers000 1 year ago
@mayers000 Thank YOU for the comment.
EricTheCarGuy 1 year ago
@EricTheCarGuy anytime champ :)
mayers000 1 year ago
so are you saying that the sensor has to be spotless on the outside
francisco8036 1 year ago
@francisco8036 Not exactly, keep those little holes in the top of the sensor away from grease or other contaminants especially silicone as that will damage the sensor.
EricTheCarGuy 1 year ago
Sorry, Eric: I thought that "lean" meant there was too little fuel, resulting in an unexpectedly low O2 level at the sensor, whereas "rich" meant there was too MUCH fuel; so much, in fact, that it couldn't possibly all be burnt, resulting in a high O2 level at the sensor. Also, how does the sensor determine the amount of O2 OUTSIDE the exhaust? Does it get a signal from another sensor, or is that comparison done by the computer? Thanks, and nice videos.
chackers 1 year ago
@chackers Lean is not enough fuel OR too much air, rich is just the opposite. The sensor has 2 parts, one exposed to the outside atmosphere (those little holes around the top by the wire) and the other end is placed in the exhaust stream. The bigger the difference in O2 between the outside air and the air inside the exhaust the greater the voltage produced by the sensor, in short, rich means (less O2 in the exhaust) voltage close to 1V and lean means a lower voltage is produced closer to 0V.
EricTheCarGuy 1 year ago
@EricTheCarGuy Ah, I see. Thanks again.
chackers 1 year ago
@chackers Lean could mean not enough fuel or too much air. Rich could mean too much fuel or not enough air. It just depends on how you want to look at it.
Masowai 1 year ago
Hay what's up Eric, what I want to know is , I had my truck tuned up a week ago, It's a 1999 GMC yukon, it ran fine for a few days, now when I stop and then start to pull off
it stalls but it don't shut off it shakes bad and feels like it's about to shut off, my check eng. light came on a few weeks before I had the tune up, the shop reset it and said I needed a tune up, don't really want to take it back without some help, one mech. said that they may not have replaced my wires or my rota cap
cwilkins318 1 year ago
@cwilkins318 Misses under load are often the result of an ignition problem but not always. If you have a check engine light on then that is where you should start with your diagnosis, pull the code and follow the trouble shooting for that code, once you have done that check to see if the problem is still there, if it is then perhaps check the wires and the rest of the ignition system. Good luck.
EricTheCarGuy 1 year ago
Damn it you did it again! I just got a check engine light...I recently used gook to clean my motor...didnt cover my o2 sensor ><...and my car has been showing some black smoke. I drive a 91 Eagle Talon Tsi show me some videos on that!!
tigerhorns 1 year ago
@tigerhorns The black smoke may have nothing to do with the O2 sensor, in fact it could be something else altogether. If you have a check engine light for an O2 then I might pursue that but it could just as easily be an ignition problem or some other electrical issue. I'm not a fan of cleaning engines as I've seen lots of problems pop up similar to yours after cleaning.
EricTheCarGuy 1 year ago
@tigerhorns black smoke usualy means your burning oil has nothing to do with 02 at all...
stigmatic79 1 year ago
nice video!!!!.... damn electronics....xD a little question.... a 4 wire o2 sensor should work as the one on the video???? thnx
ip161314 1 year ago
@ip161314 Yes the 4 wire works the same way the other wires are for the heater that brings the sensor up to temp quicker during warm up.
EricTheCarGuy 1 year ago
i bought an a/f ratio gauge by sunpro my mixture reads lean and after replacing both upstream and down o2 sensors it still reads lean if anything could you give me every possible idea what could be wrong? i have a 99 ford zx2 the gauge should sway as i give it gas it just stays at lean any help would be appreciated and its not how my gauge is hooked up
krazy8tattoos 1 year ago
@krazy8tattoos Sorry, I just don't have the space here to go into all the intricacies of the combustion process, stay tuned for future videos. BTW it might be that nothing is wrong and that's the way the engine runs.
EricTheCarGuy 1 year ago
i bought an a/f ratio gauge by sunpro my mixture read lean and after replacing both upstream and down o2 sensors it still reads leans if anything could you give me every possible idea what could be wrong? i have a 99 ford zx2 the gauge should sway as i give it gas it just stays at lean any help would be appreciated
krazy8tattoos 1 year ago
Hi thanks for this video ,I have problem with the fuel in my car it spend(burns) more than normal gas but I don't have the check engine light on yet I took it to the dealership they told me I might be the O2 sensors or the catalytic converter my car is 2002 Hyundai sonata 2.4 so do you think it's happened without the check engine light on or the guy who i bought from turned it off
MyHurtlocker 1 year ago
@MyHurtlocker If it's a 2002 it would set a code for a bad O2 if it was bad. You might want to look elsewhere for the problem, I would start by hooking it up to a scanner and reading the data that the computer sees to look for any anomalies that might indicate the problem. Any good technician should be able to do this.
EricTheCarGuy 1 year ago
My check engine light is on and is giving the code for lean running in both banks. It also has a "loping" idle and rough starts. Does this sound like the O2 sensor to you? Also if it does how do I know which sensor is bad since most cars has more than one?
Drudy90 1 year ago
@Drudy90 Lean codes are almost never the O2 sensor. It's usually an engine performance problem such as a vacuum leak or sometimes an exhaust leak. You might benefit from the video I did on "Power Balance Testing" too as well as finding a vacuum leak.
EricTheCarGuy 1 year ago