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- เผยแพร่เมื่อ 27 พ.ค. 2021
- Jeep Cherokee 1996-2001 Up Stream Oxygen Sensor, O2 Sensor: amzn.to/3fMsqdO
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FINALLY! SOMEONE WHO ACTUALLY GETS HOW TO SHOW A ROOKIE LIKE MYSELF HOW TO CHECK FOR A FAULTY PART. THANK YOU BUDDY, EARNED ANOTHER SUB. KEEP UP THE GOOD WORK AND SHOW GUYS LIKE ME AND ALSO WALKING US THRU WHAT YOUR DOING, INSTEAD OF ASSUMING WE KNOW WHAT YOUR DOING. CLEAR AND STRAIGHT FORWARD VISUAL AND SPEAKING. YOUR AWESOME DUDE 👍🏾
Thank you my friend for sharing your valuable technical advice with all those who need this important help, like yours. Many thanks.
Great diagnosis Dale . You sure are teaching Sasha a lot and the cool thing in my book is that she shows a lot of interest . I have been trying to catch you live on Wednesday's but I have had a lot of doctors appointments on that day . I have about six more weeks of injections then I will be able to catch you all live again. Have a great weekend and be safe .
Thank you. You too!
l
2222
Dude!
There is a good reason you have almost a million views. Someone...you, finally showed (as Paul Harvey would say) the rest of the story on testing the O2 sensor.
Thanks for that.
One of the most common codes... Great video. You are a damn good teacher.
This is an excellent demonstration of how to properly test the sensors works on almost every vehicle. I needed it because I am having troubles with my Toyota Camry and all indications from the OBDII lead me to the downstream sensor which is an unpleasant thing to reach. Looks like I can now at least test it before dealing with an unpleasantly hot exhaust system that needs to be dropped in order to remove said sensor. Thank you for a nice and concise video.
Thanks for taking the time to post this 👍
Man I absolutely miss my 97 Cherokee County! It had the strongest 6-cylinder engine I have ever driven! Torque for days! I'll have to say that was the most reliable vehicle I ever owned! Bought it used and paid $7000 for it in 2000 and drove it till 2017 and she never left me stranded! I'd trade my 2011 Sierra Texas Edition for your blue Cherokee!
Hey my guy thank you so much it worked perfect for my problem is good to have this much detail when due you sellers are trying to fix their own problems 💯👍👍👍👍
Now I can check my own O2 sensor and verify if it is faulty. Thanks for the information.
Awesome! Even though I get a code on what O2 sensor to change, now I know how to use a meter to verify before swapping it out.
I found this video to be informative and a good presentation.
My OBD2 Scanner said that I needed to replace the upstream oxygen sensor. I had already bought a new oxygen sensor prior to watching this lol so I was scared I bought it for nothing but I still have the receipts just in case I want to return it..
I did what you did in this video and turns out that I need a new oxygen sensor after all 😆
Grest instructions. Easy to see what you are doing. Appreciate your time!!!
Simple, clear, and to the point. Thank you.
Excellent way to describe the process and why it's not working.
thats one really nice thing about a off road vehicle you dont need tp jack it up to work on most things
High end test equipment is the same as I use! Great video..
i see what you did there :)
I’ve seen people bench test them using a propane torch with out running the vehicle and it works great.
6pp
@@marymussa5118 huh ?
but you need to open the sensor first I supposed
WTF???
Yeah removing them is the hardest part here in NYS rust belt at least
Thanks this was most informative and easy to follow visually. I’m going to try it now
This is quite informative, thanks for sharing your knowledge wise one.
Thank you for your advice. Have a great weekend
This was useful. Thank you. Going to check out what other gold nuggets you have on your videos.
Great content. Have the blessed day!
Thank you very much! This is a very nice instructional video! You did It in a very simple and easy way to understand! Keep them coming……….
Great video, just to add it always better to back probe instead of possibly spreading the contacts inside the connector causing a bad or faulty result
Quite thorough! Apperceptive! I subscribed!
You're the only one who explained to me the problem of the lambda sensor.
Thank you!
Great test procedure. Thank You.
Thank you for the video. Was a great help. God bless.
Thank you it’s clear and easy to follow
Thanks for the effort dude..great vid
Thanks for making this video. Still need to find some time to replace the sensors on my XJ. No codes, no hurry 😄
Yep. Ain't broke don't fix. Lol 🤣
Thanks for the video and learning is very essential
Thanks mate, super clear explanation.
Awesome channel very easy to understand technical directions just describe thumbs up baby love jeeps
just a note, the second oxygen sensor is not the one controlling the mixture for the ECU, its function is only to see that the signal when compared to the front sensor ist flat meaning the cat is functioning. The front sensor is used to test for air/fuel ratio and tell the ECU what mixture adjustment is required. So your faultcode could only come from the upstream (front) sensor. Downstream would cause a „Cat inefficient“ code on the motor warning.
have fun, Bernhard
AAh, very useful to know - gonna try cleaning my pre-cat sensor and see how that pans out!
He changed both so his readings were useless in this case. But aren’t there some newer cars using the downstream for the fueltrims too?
@@Xantylon74
I don’t know of any. It does not make a lot if sense since if the catalytic converter works fine all it gets is water and CO2 and there is no information about how the mixture was when it left the engine.
A Lambda sensor is reading oxygen content to identify the current mixture which is only available prior to being converted by the Cat.
@@bernhardlist9359 so should I just change my upstream O2 instead of both
@@carlward9367
Hi Carl, since I don’t know exactly what your car does it is not good for me to tell you to change parts. I had it on my Jag that just the O2 heater relay was dead which is a lot cheaper than an O2 sensor.
Can you get a readout of your sensors? Any activity there? The correct thing would be that the front sensor shows a sinewave like activity and if the cat works the downstream should display almost a straight line (konstant voltage). If both sensors show the same sinewave like activity then the Cat is bad. If there is no activity shown on the upstream sensor check powersupply else it is bad.
Excellent explanation. Thank you!
Great job on the video. We have similar style!!
Super Good video...can you please tell what kind of wire (type or gage) did you use for testing?
Great video. One of the comments was about using the OB2 scanner. Did you try this also??
Thanks
Thanks your video is a great help, I need to check my sensors as I'm getting only half the milage that I was previously getting
Having the same issue, did you replace the O2 sensor and did it solve your poor gas mileage, thanks
Thank you for your teaching video... very educational. I have a suggestion for you if I may. The old sensor that no good. Don't throw it away, You can use it as a tool. Cut the connector in half, hook up the old connector to the wire coming from the computer. With alligator clips on your meter, You can read the voltage better. The old oxygen sensor becomes a tool.
Just a thought.
genius
So it'll read the connector coming from the car only correct?? It won't read the cat. though huh?
@@joeyperez3974 correct..... What you can do in that situation is buy or go to a you pull a part lot and cut one off. There's only a few variations of connectors so there is multiple vehicles that it will work to. You can also cut the nub off and and it will work on even more vehicles. Only difference usually tends to be the clocking of the pin and length of wire for most cars. Of course not all. For a more universal female plug you can cut the whole outer shield off just won't clip in.
Greetings from Venezuela! good good channel about jeep especially about 242 engines
Thank you!
Great video and info .Excellent
Fantastic video great job!
Thanks for the video and explanation
A superb video sir.
Great video, I need to check mine now that I know how. 👍🏼🇦🇺
Exactly what I needed Thank You
Thank you for your teaching video.
very educational video ...awesome
An oxygen sensor is made of zirconium oxide (ZrO2), a chemical compound used to form the sensor’s thermal-driven electrochemical fuel cell. Energy is generated by the difference of oxygen inside compared to the outside.
Two platinum (Pt) electrodes are placed on the ZrO2 to provide a connection for output voltage to a control module. An output voltage of 0.2 V (200 mV) DC represents a lean mixture where there is a lot of oxygen in the exhaust stream. A reading of 0.8 V (800 mV) DC represents a rich mixture where there is little or no oxygen in the exhaust stream. The ideal point is 0.45 V (450 mV) DC - this is where the quantities of air and fuel are in the optimum - or stoichiometric - ratio
My man breaking it down
Auto Motive Diagnostic podcast covers narrow band O2 sensors really well. They don't actually measure oxygen, they use it as a catalyst to measure the hydrocarbons in the exhaust. There are also narrow and wide band sensors. Which ones are these?
@@roadglide6895wide band
So 02 sensors produce electric?
Thank you for the video 😊
fantastic explanation, what made you decide to replace both? can I get away with doing just the one with a bad/no signal? thanks again
Nice work
Thank u for your video. U done well.
great video thank you!
Great video! Thank you. Finally get it. Did your daughter learn how to do this? haha. Probably not interested. She's lucky to have a dad who can work on her over 20 year old car and drive a great Jeep. No longer make them like they used to. Loved the video. Thank you so much.
Thanks for this video
Great information but what were the symptoms when driving? Thanks and God Bless.
Awesome job thank you so much
Great video A+
Thank you very much for identifying the sensor heating and O2 sensor wires involved on a 4 wire sensor.
...but mostly the voltages that are measurable that they are absent, or hopefully changing via sensation of O2.
If I replace an O2 sensor again I will cut off the sensor to re-cycle the connector and wires to connect to the stripped wires rather than probing into the connectors for the next time I troubleshoot if the ECU is sending the heater voltage to the sensor.
Are all o2 sensor connectors the same?
@@MrsBuddevil look up a bunch of different ones from auto zone etc. maybe you can see a difference from the pictures.
That's a good idea.
@@MrsBuddevil no, they vary a lot, depending on manufacturer and position as well. Front and rear sensor plugs can be the same in appearance but have different little lugs that prevent them from being interchangeable. The shroud on the after cat sensor has much smaller holes ( like pin holes ) to restrict flow around the sensor. The before cat o2 sensor shroud has holes like, vents, would be the easy way to describe it, say, the size of the smallest type of grains for example, allowing the sensor greater exposure to the exhaust gasses because this one controls the fuel mixture ratio.
Good job ! Thanks it work just like the vidio
Lord! I wish I could bring my 2007 Commander to you! It needs love and the shops out here in Phoenix waiting to rip me off! I love the old girl and want her running straight! SMDH!
Thanks good information
Great video thank you
How do you know what the readings for each test should be?
Why didn't you check the supply voltage to the heater? Both white wires, which should be ~12vdc. For the supply you checked the voltage on the grey and black wires on the supply side connector, which showed ~1.5Vdc. Those wires receive the voltage from the sensor, not send voltage to the sensor.
hi. I find this interesting. I have never used a digital meter. when testing o2 sencers. always. used analog. it makes it a lot easier. liked the videos. thank you.
Is that you Dale? It’s Nate. I used to work with you at Asante in Medford! This was a great video bro.
Oh shoot, hey Nate!
How long you been out?
I have been chasing a misfire on a 95 Pontiac OBD1.5 for over a month. First thing I tested was probe the o2. Getting volt at the ECM signal side (and heater) of the pigtail and 2-4 millivolts from O2 side. Plugged in, probing the wire, I get .4V +/- up to .9V spraying fuel into the TB. Every source I have found said there are no volts sent to O2 but .5+/- produced by the O2 so probe reading says it is good. Apparently the o2 is as good as the information I have gotten.
Same Comment as B.V.G $Feddie$ Thank you so much for taking the time to teach us how to test an O2 sensor. GREAT VIDEO New Subscriber : ) (.05 is 5 "hundredths" of a volt) .005 would be 5 thousandths of a volt (.tenths/hundredths/thousandth... )
good video. thanks
Nice video, very complicated for someone like me. Can I just remove each sensor and visually inspect them for carbon build up or other? I had a cat go real bad and fouled up everything, O2 sensors can be cleaned right?
Really hepfull, thx
Oxygen sensors should be cleaned at 90K and 180K(replace them at 250K) by removing them and heating the sensing portion all around to cherry red with a propane torch, while checking response time with a volt meter. Using a meter while on the vehicle is not necessary as you can just hook up an OBD2 reader set to read live data. On an early fuel injected vehicle this method may be useful. *Edit for those not familiar with O2 sensors: there are four wires. Two are the same color, two are different colors. Connect your volt meter set to DC volts on the two wires which are different colors. Polarity doesn't matter.
I have bank 1 sensor 1 0.28v bank 1 sensor 2 0.28v bank 2 sensor 1 0.04 bank 2 sensor 2 0.30v. Po300 only 03 nissan 350z . Engine cold
@@merkey PO300 is random multiple misfire, usually related to the ignition system but not always. How many miles on your spark plugs? What is the impedance of your coils? As far as the low sensor voltage, look at your fuel trims. How does bank 2 compare with bank 1? Spray around the intake area with carb cleaner to check for vacuum leaks. Verify the fuel trim findings by looking at the spark plugs for signs of rich or lean condition.
@@alouiciousjackson5812 okay so i have brand new spark plugs and igition coils. short term fuel trim 11 0.0% and short term fuel trim 2 1 +25%. pulled plus definitely fuel but not like super black carbon rich still new
@@merkey short-term fuel trim bank 2 is plus 25%? Sounds like you have some bad injectors or a fuel pressure problem that it's trying to compensate for
@@merkey also check for vacuum leaks
4:00 In an electronics store near my house, I found a multimeter similar to the one you have. Do you recommend buying it or buying a better type of it?
Excellent young man. You and the sometimes annoying young man at Shrodinger are Awesome :))))
I tinker and barely know enough which gets me in trouble.
I picked up a 2004 Durango 3.7 with 115 thousand original miles is a misfire pain in the butt.
Had a compression test and leak down test which indicated very good.
Changed original plugs and put new coil packs in.
Ran for 30 miles and started misfiring. Once it started with cal 3 then 4, switching coil pack around would get it back running for another 25 or so miles.
reader always has indicated low voltage bank 2 rear 02.
Also reads IAT sensor has issues.
My resistance between white o2 side wires is 4.4. You said it should be 5-7.
It makes sense this could be an issue.
Best; Tom
Nop...a faulty oxygen sensor cannot render a vehicle to misfire....quite often compression test misleads the diagnostics...go for cylinders leakdown test, it will precisely figure out issues of low compression (if any) due to ring-piston or intake/exhaust lifters or compromised head gasket.
Erroneous reading in IAT renders quite rich fuel mixture, get it rectified first, then get your vehicle checked for air leak in intake manifold & associated hoses/pipes or air leak due to fsulty EVAP solenoid...EVAP solenoid is notoriou for air leaks and causing misfire kind of symptoms while you suddenly accelerate after you depressed the gas pedal.
Moreover, get your PCV valve cleaned and pcv system both hoses checked for air leak or blockage in hose meant for pumping filtred air to head cover
wondering if I can go thru all the steps on 1 sensor at a time, because my floor jack is too heavy to move back and forth. It would mean that the 2nd and 3rd sensors I have not examined at all yet, will be getting tested warm whereas the first one I tested got the first 2 parts of the test done with a cold engine. Anxious to hear your opinion. Much appreciate your videos. Thank you.
Awesome! Makes it look easy.
Man I miss my Jeep. That bad boy undercoated? That frame looked beautiful
What wires did you use to connect to O2 sensor for voltage?
Will this work even on a rusted oxygen sensor that the treads in the exhaust manifold are rusted together? I tried everything to get it to losen but no luck
2005 Jeep Wrangler 4.0 all 4 sensors testing low on heater code P0031 - P0037-p0051-p0057 I replaced all with NGK and still lit on. I checked all the wires, disconnected the PCM, and continuity was all good, Pin 1-3-4 were good from the sensor to PCM plug and pin 2 to ground, my question is does pin 1 heater wire have 12v because I'm getting nothing as I understand on a cold start the PCM will circle a 12V + or 12V Negative signal to the heater. The circle will decrease to off as the sensor heats up.
Thanks
Excellent !
Hi JeepSolid, the resistance of my upstream O2 sensor reads at 7.8ohms. On the Wrangler TJ it should be between 5-7ohms.
Is it a problem that the resistance is higher that 7 ohms? Does that mean there is an issue with the heated of the sensor?
Thanks! A great job in all respects, seeing, hearing, and explanation! Light years ahead of the norm! Subbed ! 🌈
How many oil sensors does a 2002 Chevy Silverado have
Thank you, thank you, thank you!!
For a 1994 bmw 318i which order are the camshaft crankshaft bank 1 and bank 2 knock sensors connected into the wiring harness
Oscilloscope is a better device to check the O2 sensor voltage signal oscillating between 0.1 to 0.9 V, with a multimeter it is difficult to catch milliseconds voltage readings.
Anyway thanks for your efforts.
Thank you 👍💯
Yeah thank you for teaching me that
Quick question! Do you think that a faulty o2 sensor can cause a misfiring code?
I drove my '99 Expedition like 5 hrs ago. The exhaust barely feels warm to the touch. Does resistance reading depend on temperature at the o2 sensors? The o2 sensors read 4.2 Ohms which would mean they're bad unless temperature plays a role.
Hello friend, is it ok to simply use the data stream feature on each O2 sensor using an OBDII reader? It seems like a little less trouble, or is this not an accurate diagnosis.
Yup, you are correct...when you see the jumping voltage values in obd data, it means sensor is doing its duty....BUT What if it doesn't show any voltage? Or obd gives you error code for this sensor, will you straight away change the sensor??? No, you need to varify
Which 02 sensor did you change. The upstream or downstream? Also which one should you change if you're getting poor gas mileage and a bit of jerking when accelerating at higher speeds (highway driving)
He replaced downstream after the converter check for engine codes it will tell u what one to check
How did you get the multimeter to stick to the car
I have a 2007 dodge nitro 4X4 3.7, here's my question. If I replaced them with after market O2 sensors would my check engine still come on because their not the OEM from dodge. New O2 sensors I got has a didn't part #