2016 PPV..O2 sensor graph, Is it normal?

[Tim10]

Hi guys,

is this normal for O2 sensor 2 to be so steady? I heard it has to fluctuate?
I didn't use the diagnostic tool before and was wondering if this normal?

 

[wjburken]

Hi guys,

is this normal for O2 sensor 2 to be so steady? I heard it has to fluctuate?
I didn't use the diagnostic tool before and was wondering if this normal?

View attachment 236741

What type of driving was happening when you took this data? What is the time span of the data sample shown?

 

[Tim10]

What type of driving was happening when you took this data? What is the time span of the data sample shown?

Just stopped after 20 min drive, and time span would be around couple of minutes, even when I was driving sensor 2 grap looks steady, only went down when I stopped on red light and then goes back and looks steady

 

[swathdiver]

Hi guys,

is this normal for O2 sensor 2 to be so steady? I heard it has to fluctuate?
I didn't use the diagnostic tool before and was wondering if this normal?

View attachment 236741

Looks perfect! You know you have a problem with the cat(s) when the downstream sensor(s) begin fluctuating like the upstream sensors.

 

[OR VietVet]

Exactly what James said. The after reading means and shows what the cats are doing. The fronts are reacting to the exhaust flow before the cats and you do want to see the constant switching on them.

 

[Tim10]

awesome! thanks, guys!