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Yes . You have HFM system..that stands Hot Film Mass. So ,this is not Hot Wire like the older LH systems.
But , that plate gets an oil/dirt film on it that effects the sensitivity and ablity to read air mass... more so than the hot wire ones do [ they burn it off]
Anyway, you know the deal..reset and drive it, watch for the change. Might also want to cap the vac line going into the purge for a few drive cycles at the same time ..that way , if all turns out OK , you can return to purge and if comes back then, you know the MOT is not closing .if that is the case, seeing that you have cleaned it, I would replace it..but not until you have verified where you are at.
An Indie/dealer would be looking at these adaptation numbers, but it can be done diyer this way, just takes some patience/time and monitoring.
Try and get that 02 sens cleaned up with the hill trip too..you know it is carboned up b/c of the past condition of a/f mix..you want that to be clean so it can work fast to help keep the trim in place..