How to Properly Understand Your O2 Sensors: Vehicle Oxygen Sensors and Their Role with Fuel Trims

This video will discuss the importance of understanding your o2 sensors.
0:30 Narrowbands and widebands
0:45 Let's look at this scan from a 2016 Corvette using HP Tuners scanner
0:55 oscillating o2 sensors mean...
1:10 Ethanol content of your fuel
1:30 Wideband setup
2:00 At some point regardless of how much you spent on your wideband a sensor will go bad...
2:30 we see this a lot..you are doing a WOT pull and the wideband reads dead lean....
3:10 You can verify this by looking at your narrowbands
3:45 High millivolt reading tells you that....
4:40 18:1 ratio is really bad
4:50 Swap vehicle...look how bad this scan looks
5:47 Bad signature
6:00 Car drove horribly
6:30 Look at what the fuel trims are doing on bank 1 and bank 2
6:45 Reason why is...
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[@marklowe7431]

Totally dig how Tuning School / HP Tuners are so open for all to use and learn. #1 reason for using them.

[@clinthunt5933]

yep great video, try diagnosing to find a narrow band o2 sensor in bank one and a wide band o2 in bank two. though its a lot easier to spot thanks to yall.

[@markrich3271]

One of the more informative videos for me personally I seen in a while from you guys loved it thanks. Common sense really but I get pretty confused reading my scan files.

[@silversled123]

As usual, so insightful.

[@josealeman1992]

nice videos guys... very short but full of information and right to the point

[@JamesRountree_]

1 dislike? Who would dislike this

[@jrjrose132]

you guys are awesome God bless

[@eb972]

Wired backwards as in from left to right? Or polarity is backwards?

[@rpturbo]

I wish you would have went into that a little further, where the WB is showing 15.7 commanded is 14.7, and even though its lean, is showing its pulling ~2% both STFT and ~4%LTFT. Love your videos though!

[@CamaroRick]

I see that a lot on c5's normal shops are prone to installing them straight back on the tunnel vs crossing them over in the mid pipes.

[@BIGGDADDYWIGGS]

Camaro Rick can you give me more detail on this because I had Longtubes installed and now get codes P0134 and P0154 which says No activity. Looks like wires are connected and didn't see any burned wires.

[@CamaroRick]

I dont think crossing the sensors will cause "inactivity" like your codes suggest. Check the sensor wiring with a multimeter for voltage look up the connector end view for your sensors to figure it out

[@fortnitedaily1042]

Full throttle the car is ranning rich, but does this mean stft to be -25%?

[@kennethking8759]

So when you say there dead when they won’t read over 450 something,does that mean there bad and need replaced? I’ve got a gto I put together and neither sensor will read over 458 no matter what fuel is added.

[@dinkplayer3238]

I could sure use some help with my tune

[@TheTuningSchool]

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[@SeanFarley25]

So.. If you are running full e85, you don't want it to idle at 14.7? More like 14.3? This always confused me

[@beardedgiant4136]

So if the 02 sensors are pulsing and holding a little over 9 volts then the AFR is 14.7? Then what would cause my car to run rich?

[@markrich3271]

injector pulse width or ve map