O2 sensor screen shots.

Status
Not open for further replies.
Joined
Jan 5, 2017
Messages
384
Location
Talkeetna AK
2011 Equinox 2.4l. Just had the rings and pistons replaced courtesy of GM.
My downstream o2 sensor used to run at .8 volts and was very steady. Now it looks like this. Yes car was warmed up.

Catalytic converter is still under warranty and in fact GM extend the warranty out.

No codes so I'm guessing that it's starting to go but not bad enough yet for a code.

Or maybe everything is fine???


 
Yeah i would think its on its way out also. .8 and .2 are a bit out for switching voltage (from ruch to lean) .6 and .3 being closer to what you want.
 
I was looking at the downstream sensor (green line). It's starting to switch too much and is following the upstream sensor (red line).

I thought the upstream is supposed to switch between .1 and .8 ish
 
Status
Not open for further replies.
Back
Top