Using O2 Sensor Data in Diagnostics

[JA-rcuy]

As a forme ASE certified automotive technician, this is the best simple explanation I have seen in a very long time.

[wildthoughts]

This is the best VIDEO explaining O2 sensors behavior . So many videos on this subject on YT, however all have spaghetti shaped information, unclear and disorganized or vague . This one nailed it. Thumbs up man. You should be teaching classes.

[smartmotives]

Very well explained, I come back here often to refresh my knowledge on this

[TristanRega]

no wasting time, straight to the point, love videos like this, thank you this was very helpful!!

[ronemtae]

What a great great explanation it’s the first time I’ve actually seen a video that makes sense. Thank you so much.

[dereksmith]

Just watched this video in the cab of a truck I’m diagnosing 😂 you’re a saint man thanks for the clear cut straight to the point Info

[pallen]

Love this video Straight to the point . Unlike others video that want to tell use all about their life story than 2min of the video u get nothing. Keep it up thanks

[thinman]

Easy, to the point presentation. Thank you.

[atomicdmt]

excellent! Important to consider the best cleaning and the main causes for lean and rich conditions. I just chased down several AIR leaks: intake and exhaust. One of the exhaust donut gaskets at the exhaust manifold had completely crumbled when I dismantled the connection, for example. SMOKE MACHINE is a simple and powerful tool everyone must have!

[FranciscoJavierOutdoors]

Thanks for the info man, diagnosing mine for sudden loss of power after a while of driving. Mine is the inline 6 engine, so only 1 o2 before and 1 o2 after. I thought it couldve been the cat, but the charts look like your top 2 o2 readings. They look perfect. Thanks for this info again

[Deviantsoundz]

Such a nice and simple explanation, and finally, someone mentions that the graphs should look different between sensor 1(up and down constantly) and 2 (a steady reading).

[Pk_Garage]

This was very helpful. Need to diagnose a P420 on a 07 Toyota Camry. I suspect the Oxygen sensor but need to verify that first.

[thewandercruiser]

Thank you so much for the explanation! I'm hoping this helps me figure out why I can't get my catalyst monitor into a ready state. It's a brand new exhaust with Magnaflow, CARB compliant cats, but I can't get the catalyst monitor to set. I've tried everything, and followed the drive cycle tech bulletin to a tee with no luck.

[johnmcminn]

Great info. It should fluctuate on the front sensor .01 to .09
But on the sensor after the cat
Should be flat . I am using spacer extentions

[Danilo]

Excellent video, I already knew most of this but it was a good refresher

[deanlhouston]

First question, In your video, was the vehicle engine idling or did you have it up at some specific RPM? I notice my post-cat sensor readings look flat during idle but sometimes in the .3mV range, sometimes in the .7 or .8 mV range. But when highway driving (~2200 RPM), it's switching up and down making me think the cat is bad. Is that normal for the O2 readings to behave differently in those two regimes?
Second question, how can you test if the O2 sensor itself is working fine and not fooling you into thinking the cat isn't working correctly? I know the O2 sensor is pretty cheap compared with the cats, so guess I can go ahead and swap them out and see if problem remains, but is there a specific test you can perform on the O2 sensor to know if it's the problem instead of the cat? Thanks!

[mattd]

Love the video dude! Explaining the difference of a narrow band that you're working on here I believe is important information to note you're NOT talking wideband! Im definitely a shade tree mech here so I'm no mechanic in that sense of schooling but im learning lambda a/f sensors! They definitely read differently! Great video for a narrow band buddy! Not talking shit bro just it's good to share that info I think

[carlosabreuv]

Very good video, short and to the point. Thanks Hunter!!

[KantusKid]

Concise explanation even if I still can't wrap my heads around it. It at least points me in the right direction.

[jerrypeal]

Good explanation. I use the O2 all the time .