Hi all,
I had a question about how the scanner reads O2 sensors. I have a 2004 Chevy Monte Carlo LS with a 3.4 that I am troubleshooting an EGR issue with. It may be that I have a stray voltage somewhere, or a bad ground somewhere. The issue I am curious about however is where the Generic O2 sensor reading comes from, as it is reading differently from the B1S1 O2 sensor. This engine only has Bank 1 sensors, upstream and downstream, and what I see is the Generic sensor having a discreet line at the same voltage as the downstream O2 sensor, otherwise tracking the movement of the Upstream O2 sensor. I'll edit this post with a link to a screenshot of what i mean shortly.
Does this make sense to anyone?
TIA
Screenshot showing O2 weirdnessO2 Oscillation Wide View.png
Screenshot showing O2 generic much narrower than O2 B1S1, and EGR Issue's I'm chasing EGR and Narrow O2.png