Diagnosing O2 Sensors

On this episode of Fear No Fix, Chris and Jordan break down how to diagnose O2 Sensor issues.
If you need to read codes or live data to help diagnose your issue, BlueDriver can help! Get the #1 Scan Tool on Amazon here:
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Top DTCs (Diagnostic Trouble Codes) associated with O2 Sensors:
• Heater Control Circuit - P0030, P0031, P0032, P0036, P0037, P0038
• Heater Resistance - P0053, P0054
• O2 Sensor Circuit - P0133, P0139, P0140
• Sensor Heater Circuit - P0135, P0141
• System Too Lean - P0171
• System Too Rich - P0172
• Catalyst System Efficiency - P0420
Top symptoms associated with O2 Sensors:
• Check Engine Light
• Reduced Fuel Economy
• Reduced Engine Performance
• Rough Idle
• Exhaust Odor
• Black Exhaust Smoke
• Failed Emission Test
• Engine Misfire
• Engine Over Heating
• Catalytic Converter Damage
Video Sections:
Intro: (0:00)
Visual Inspections (1:51)
Testing Heater Circuit (4:10)
Live Data on Older Sensors (7:28)
Introducing a Lean Condition (10:44)
Live Data on Newer Sensors (12:00)
Replacing O2 Sensors (14:36)
Outro (18:02)

[@littleand9250]

You guys a living legend’s because you teach us how to try and fix it our self with equipment we can afford (Bluetooth OBD2) and not a $5000 scan tool. I’m having trouble somewhere in the catalyst system and only have very limited funds. THANK YOU FOR THIS VIDEO

[@motor4151]

I’ve had my BlueDriver for about 2 years and absolutely love it! Love the links to parts and videos.

[@Evanturar]

Blue Driver videos are absolutely the best vids on the web. Well done!

[@sparky1044]

If you're in the rust belt, heat up the exhaust pipe near the sensor before attempting removal. I actually tore the o2 sensor housing clean off a 2002 yukon trying to remove bank 1 sensor 2.

[@aaronwism]

Spray on blaster on and soak overnight. Comes off like slicing through butter 🧈

[@Tony-jv5pr]

Wow, I'm so happy, I purchase Blue Driver. Great video, I feel like a expert from watching. Well put together video. ❤️

[@krazytaxicabbie]

Now I know how to read that live data. My #1 sensor needs a replacement. Fantastic video. Thanks!

[@TimmyMill87]

It should be noted that you will want your crowsfoot-type O2 socket to be perpendicular to your torque wrench. Otherwise, the torque that you're applying will be different from the value that you set your wrench to. Also, if you're replacing an O2 sensor, they should already have anti-seize applied to them from the factory. And a final note - if you remove an O2 sensor just to inspect it and plan on reinstalling it, they have a crush gasket (washer).

[@georgeh1352]

Good info guys, old style O2 sensor waveforms is just what I was looking for. Thanks

[@friguy4444]

Excellent information and teaching! Thank you for the great video! One little thing I am laughing about to myself as I watch the video is that for the sake of the viewer (Me lol) you've chosen a car with an O2 sensor right up front where it's the easiest thing to see, find, work on and possibly change out if needed. I want people to know though that almost all (obviously there are a few that are easy) are VERY difficult to find, reach and work on. 16:08 "This sensor is proving to be pretty easy to remove". Wow he sure said that right LOL. They are being VERY polite and smooth. In the real world 95% of the sensors you will have to remove will "prove to be" lol. Al LOT more difficult to remove. A LOT, LOT more difficult. They are so often only accessible from underneath the car and sometimes only through the wheel well or some other strange place very difficult to reach. Sorry for telling the bad news. But the facts are always better to know up front then finding out later when you're in the thick of it. Thanks again for the great video!

[@georgeh1352]

I guessed they would be, luckily for me my S1 is right in front and came away easily with an open ended spanner....phew. (Mitsubishi Lancer 2006)

[@petecurran3995]

Great show, fellas! 👍🏻 🇨🇦

[@Danilo111]

Excellent information. Thank you very much.

[@shinola228]

Great video. Thank you for making it

[@Dhofari444]

thank you bluedriver for this fantastic video your amazing device reaching Oman 👍🏻

[@d.l.horton2093]

Relax guys. I like my Bluedriver and would still recommend it to anyone. I've had mine for about 5 years.

[@freddiejonesy6168]

Great video!

[@INTERNA9]

Thanx

[@randyb3347]

Awesome. Thanks.

[@rihovaher]

Hello ! I took my hyndai getz 2008 1.4 petrol .no. 1 lamb from the sensor before the catalyst, diagnostics showed a non-existent very low signal due to which the engine worked very stiffly and you could feel the vibration. I put a new lambda sensor original bosch and checked it with the diagnostic device on the engine running in 71.. .730 Ma was the rapidly changing amplitude of the signal. Although I'm not a professional car mechanic, I managed it, as they say a man from the forest fixed the car, good luck to all DIYers!

[@David-ko9wg]

Gracias por muy buena información especialmente para reparar mi pickup ford

[@joebagofdoe4762]

Good video Makes me want to buy a bluedriver The only issue I had with the video was that when monitoring the 02 sensors there was no bringing the engines idle up to 2500 rpms? But otherwise amazing video!!!

[@raysno8367]

Yes had my blue driver over 3yrs not knowing how to use or read the live data !

[@fishrowe420]

02 stratus. 80k miles. Check Engine light just came on. Reader says cat or o2 sensor. I'll start with the sensors... thanks.

[@syedmukarram8597]

Thanks, this is helpful

[@janosszamoskozi6481]

Could you please advise how the ECU interpret the narrowband o2 sensor produced up and down signal fluctuated in the entire range? Does it averages or pick a value in a specific time?

[@whlawson5812]

I heard about the cars built before year 2006 have different type of sine wave pattern for the O2 sensor. This is due to the ECU not cutting back fuel sufficiently to prompt the voltage to 0.1V for the O2 sensor. Yes, no?

[@jamesconnors5653]

Thank you.

[@magicone9327]

When torquing how do you compensate for the offset socket which would change the values of the torque wrench?

[@randyb3347]

My 2004 ram 1500 hemi purrrs like a kitten in open loop. The moment it hits operating temp and goes into closed loop it stalls. Both upstream sensors are north of 1.2 volts, and both downstream sensors are nearly flatlined steady at 0.8 volts. All 4 sensors were recently replaced with non-oem sensors. Any ideas you may have would be greatly appreciated. Thanks.

[@randyb3347]

UPDATE: My crankshaft position sensor had failed. Replaced the sensor and it's purrring like a kitten in closed loop.

[@chingonr]

@@randyb3347 thanks for the update. why did you replace the crankshaft position sensor? did it throw a code?

[@randyb3347]

@@chingonr Yes, it finally threw me a new code and it was the CSPS. But that didn't clear up my 02 sensor codes. I suspect now it's because when I changed the sensors I screwed up and put dielectric grease on the connectors upstream (not the downstream, I was kind of experimenting). Had I read the service manual first it clearly states to not put any grease/lubricant on the connectors. My wife has been advising me since we met to read the instruction first on everything :) You live and learn....

[@kalpeshkapadia4623]

Thanks sir

[@Mmmmmmmiwish]

I try disconnecting a vacuum pipe on my mx5 NB ( pipe from cylinder head cover to intake body) to get a lean reading on my BlueDrive but the engine cut out...

[@bobomomo3764]

I got (closed loop) as soon as I turn on the engine, 20 seconds After a cold start How can this be fixed I don't think it can go closed loop this fast. Or can this be normal for some vehicles?

[@icepick859]

Normal

[@scottykilmer3920]

Mine goes in close loop within 6 seconds, pretty normal.

[@MsTragedy]

Why did you guys stop making videos they were so helpful!!!

[@usmcfoto2508]

I am confused. With my 2005 Mitsubishi it shows a steady up down for bank 1 sensor 2 but for bank 1nsensor 1 it shows numbers, not a graph. Therenis no reference for what is acceptable for the numbers.

[@armushkhan6965]

My o2 second sensor voltage is higher than 1. 0 It fluctuates between 1.0 and 1.02 on idle and when i rev up its value goes upto 1.6 What could be the reason?

[@ramontgillespie5]

I have a 2000 Chevy Tahoe unlimited. Service engine light pops on from time to time. Will this pull the code and also pinpoint the exact sensor?

[@nnawazomal]

Informative video thank you. How can I share my live data report with you to understand if it is O2 or Cat Convertor?

[@polishedbrother]

Hey Ed.. does it matter if I buy a Bosch O2 sensor or an Infiniti O2 sensor?

[@farmingandmaybemore5175]

Can this work with 24V type B obd2 vehicles or is there an adapter to make it work with them?

[@E85_STI]

So you guys are diagnosing the o2 sensors while the vehicle is just idle? Just asking is all.

[@charlesberlanga4452]

What about a P2245 (on a '12 Jeep Wrangler JK)?

[@humbledhands]

Hello good info. Checked my pre cat sensor and it was reading over three volts? Any ideas any leads would be great thanks. Got a new subscriber

[@kayjay4060]

While idling at full operating temperature?

[@Aali289]

Does anyone know where's oxygen sensor 1 bank 1 in a mecedes E350 2017? Please help @bluedriver

[@mendoblendo321]

Mercedes are a nightmare with repairs. Not sure. Everything is customed for Mercedes. Get rid of that car

[@Worship_kingdom.]

What if an A/F amp is a negative number ?

[@easyhec]

2.9 ohms on a heater circuit? its ALMOST shorted. What does the meter read test leads together?

[@mback12000]

2.9 ohms on 12v is 4.1 amps. That does not seem like a short for a heating circuit. And that also is about 49 watts... again, seems reasonable for a small heater.

[@jpadilla0515]

These test are at idle correct?

[@crisperez592]

Are you guys done making videos ?

[@AmerElMumenin]

How much this BlueDriver obd2...

[@Zeta2024-jz6nc]

7:31 Microdose has kicked in 😅

[@oduwaehigie4993]

can I use it in Italy?

[@gavinshaffer6220]

My thing says my car only supports one oxygen sensor?

[@jeffboe357]

Anyone else have hard time looking at o2 sensors? 2015 Nissan Sentra

[@genvega6368]

Anyone ever associate a P219A with a bad 02 sensor

[@kimstuff61]

You guys have a video of how to change A torque converter on 1999 Mercedes S 500

[@mendoblendo321]

Need a whole new tranny

[@michaelgayford2439]

Hands in pockets?

[@BenCadorette]

Oh my….

[@tturi2]

thats outta pocket

[@georgemoomaw9437]

Along with your excellent tutorial you need to give about a million other KZbin people how to present a no nonsense video. Head banging music, fireworks, convoluted graphic introductions and unfunny attempts at humor are nothing but aggravating time wasters.

[@bustacapp359]

Name ONE highlight in this clip where CW is not telling the truth!

[@desi4lyfe379]

I wish if I have known bidirectional scan tools before I bought bluedriver. Guys, please save your money & buy a bi-directional scan tool. Bluedriver was good 5 years ago, but it is not a bi-directional scan tool. I had to re-set my TPS after cleaning throttle body and than only found out about TPS reset after cleaning & bi-directional scan tools.

[@iam1smiley1]

I have 2 good bidirectional tools and still keep my BlueDriver in my pocket. It gives good data but yes, a bidirectional is needed at times but there's also ways to go around them at times.

[@desi4lyfe379]

@@iam1smiley1 I had a SRS light on my 07 civic & Bluedriver misled me to coming so close to replace front collision impact sensor. In fact, that sensor was never the problem.

[@iam1smiley1]

@@desi4lyfe379 code reading is only part of the diagnostic process. Codes may put you onto the correct problem area but it's still up to the technician to do proper testing before changing parts.....you see this happen a lot with O² sensors!

[@desi4lyfe379]

@@iam1smiley1 There are so many cheap obd2 readers & I dont see the value in bluedriver. It was a great product back in the day, but bidirectional scan tools are just much better.

[@bobomomo3764]

Guys my fuel status shows (closed loop) just after a cold start. And the fuel trims start showing the readings. I don't understand why doesn't make sense 😐 It should only become closed when heat increases. Not sure if that's accurate or it needs an updated IDK Bluedriver Fusion 2014

[@Ninurtha1]

Its Air fuel mixture sensor. Not 02 sensor. At least call it upstream sensor .

[@georgeweier2108]

Codes on my blue sensor

[@georgeweier2108]

Anna Ren and it’s giving a red light

[@shinola228]

Great video. Thank you for making it