reading O2 sensor from Tech1 - AFR concerns - ZR-1 Net Registry Forums

Raykahn · 05-11-2024

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.

05-11-2024	#1
Raykahn Join Date: Jun 2022 Location: Virginia Posts: 81	reading O2 sensor from Tech1 - AFR concerns 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.