Data clarification / confirmation on SecO2.V
Posted: Sun May 28, 2023 5:16 pm
After upgrading the turbo on my 2021 2.0T 10AT I have an emissions error (P0139) on the secondary O2 Sensor. I think I can sort that out by looking at my Ktuner logs. I am hoping to confirm that when I am looking at data in a log that the "SecO2.V" is the voltage reading on the down-stream O2 sensor. I would also like to confirm that on this log the AFR is the product of the up-stream O2 sensor. Or, is the AFR an average between those two sensors?
I assumed I had damaged the down-stream O2 sensor when changing turbos, but I am seeing values of 0.03 to 0.76 on the SecO2.V, which I assume is the voltage. If so, that sensor seems to be working in the expected range (zero to one). To ask another way, is there a place to see the voltage signal from the up-stream O2 sensor? I searched the online resource, but did not find what I was looking for.
I assumed I had damaged the down-stream O2 sensor when changing turbos, but I am seeing values of 0.03 to 0.76 on the SecO2.V, which I assume is the voltage. If so, that sensor seems to be working in the expected range (zero to one). To ask another way, is there a place to see the voltage signal from the up-stream O2 sensor? I searched the online resource, but did not find what I was looking for.