Hi guys,
I am seeing some weird O2 sensor behavior of my supercharged 2012 GT. It have had it repeat twice now, on different drives.
Following a WOT blast, I go into decel and the WBs go full lean and the rear O2s fall to around 0v:
O2-1.png
About 7 seconds after running near 1.0 on the WB, one of the rear O2s wakes up. The other follows a couple seconds later.:
O2-2.png
20 something seconds later of the wideband bouncing between 1.01 and 0.99, they are still not switching. Just kind of lazily hanging around or under .75v
O2-3.png
Now, about a minute after the WOT ended, the STFTs flatline at 0.0, the rear O2s start switching actively at ~0.9v, and the widebands bounce between 0.98 and 0.88
O2-4.png
This seems to suggest that there is a ~10% disagreement between the front and rear O2s about where stoich is.
Is this showing the ECM trying to recalibrate the wideband?
Does this show that one or more of my O2s are failing?
What are we looking at here?