Possibly old codes, did you clear and refresh.
I had a load of old junk codes when i first hooked mine up, cleared it and none have come up since.
Nver mind the second lambda
no, only tells you the cat may be going/ is going faulty. Does nothing else whatsoever
(turns on dashlight, wow!)
Found these my RSTuner tonight, not seen them before and wondered what they were?
DF0038 / DF0083/ DF0602 - Rear O2 heater fault
DF0038 - Rear O2 heater fault on activation
Yesmay also be part of the maps.. he was working on the dashlight coming on/keeping it turned off. This was quite some time ago so he might have succeeded