not really
i am here,lol
There is good and bad advie in this thread so beware before attempting any of the above.
the 2 digit codes are from obd 1 systems and they need someone with techincal expericane to repair them as you NEED to measure values with a meter.
Also a running lean is highly unlikely from an o2 sensor more of an egr problem
the o2 sensor each have there own wiring to the computer or else it would be a waste to have them . It just measures the temp for burn exhaust gases. The one before the cat measures the engine burn the one after verifies the cat is working.
hot mean lean rich means cold but you need to find out why.Unlike an obd2 system which identifies specific sensors this one does not ,It needs proper knowlegde to decode it.