how do i reset the o2 light on 1995 Isuzu Pickup

o2 light came on at 90k mi changed the o2 sensor, light remains on? 95 isuzu pu 3.2l

2 answers
My friend reset mine. He's a retired mechanic. All he did was remove the instrument cluster from the dash and short the wire for the O2 sensor. Get a shop manual for it before trying this fix. Just to make sure you don't damage it trying to reset it.
I don't think it's an O2 sensor light. Either it's a 'maintenance reminder' light to get you to service the EGR and emissions system, or it's the 'check engine light' trying to tell you that the computer has detected a fault in the engine/emissons control system. Get it checked out by a pro.
If you want to find a specialist, here's a directory link for you:
https://repairpal.com/directory?address=33435&car_brand_names=Isuzu