[callisto]

Hi all, I've been decoding the red intake ECUs and one of the cool things I found is that Subaru has rescaled the Front O2 sensor down to 10.14 AFR. I know the community was trying to work out this rescaling a few years ago with black intake vehicles (which were limited to 12.17 AFR), and since both use the same front O2 sensor, that seems useful to share. So here's what Subaru thinks a wideband scaling should look like for gen1 (K00G black intake, S10C red intake) Front Oxygen Sensor Scaling A/B.

EDIT: See tomm's comment below; Ecutek may have a better-scaled table, and there's other threads on this forum discussing that scaling years ago as well. This may not be the best scaling, but any of them is going to be an improvement over what shipped in 2012.