i just replaced my o2 this week with my d16z6 swap i reset the ecu twice and still throwing the code. im running obd0.

 

how are you running obd0 with a z6... are you running some 1 wire setup? so much of this doesn't make sense. was this a universal 1 wire or a factory plug style 1 wire? if it was a universal, that is likely your problem, especially if you soldered it, because you shouldn't solder it.

you need to add a whole lot more details for anyone to be able to help you.