P2096 is being persistent. (Downstream O2 sensor)
So my 2014 ES 5 speed has been turning my Service Engine Soon light on with the code P2096, for the downstream O2 sensor detecting lean conditions. Both upstream and downstream sensors have been replaced, but P2096 is still showing up in pending codes even after being cleared twice. Just rolled over 115k miles today.
Before anyone asks, the original catalytic converter IS still there, since I don't feel like dealing with those issues. I do, however, have a ram air setup, but the MAF and MAP sensors are reading fine.
My UltraGauge has been showing the car runs consistently rich by a slight amount, but at WOT the lambda maxes out at .893, even when the commanded AFR is slightly richer. Long-term fuel trim goes between 6 and 3, then up to 7 off throttle.
After some research, it looks like the downstream O2 sensor voltage is running high. It bounces around from 0.58-0.74, sometimes as high as 0.88, and I read somewhere it was supposed to be at around .45 volts.
It's more of an annoyance than anything, since the car runs fine, but I'm trying to figure out the source of the issue. I doubt I'm actually maxing out the injectors from the intake alone.
Anyone else have any experience with this code?
Last edited by Cani Lupine; 12-11-2021 at 11:36 PM.
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View my fuel log 2014 Mirage DE 1.2 manual: 49.2 mpg (US) ... 20.9 km/L ... 4.8 L/100 km ... 59.1 mpg (Imp)