reading O2 sensor from Tech1 - AFR concerns

[Raykahn]

I have a wideband gauge that recently started show me running incredibly lean on medium to hard acceleration (20+ AFR).

Nothing feels off though. If it weren't for that gauge I would have no idea. No codes pop up, no stumble, no roughness.

I borrowed Jagpanzer's tech1 and have been looking at the mV readings from the O2 sensors. At WOT both R and L sensors jump to 800+ mV. My understanding of these sensors is that you can't use the mV reading to determine a specific AFR, but in general being 500+ mV at WOT should indicate I am at least not running lean. That makes me think the sensor for my AFR gauge is bad, or the gauge itself.

Do I have anything wrong here?

How closely should the R and L sensor mV read to each other? They seem to wander a fair bit from each other at idle and easy cruising, but at WOT they both spike and are within ~50mV to each other. At idle the L sensor seems much less stable than the R sensor.

[scorp508]

Does your wide band sensor have a fresh air calibration routine you can run on it?

[Raykahn]

That is a good question. I'll need to dig out the manual for it.

[Raykahn]

There is, but I need to access a controller box that was buried away during installation. I'll have to dig that out to initiate the recalibration, and relocate the box for future ease of access.

[XfireZ51]

Not unusual to have a rich/lean disparity between banks in idle state w drivers side being lean.