Operatic

I'm posting this in the turbo form because I think it may be turbo related (as it happened after i installed my turbo). Anyways, CEL for primary oxygen sensor went off, so i bought a new one. 3 days later, goes back on for the same problem. Now i bought an OEM oxygen sensor from honda, so i'm guessing somethings a miss. Here are the things i have checked so far is the wiring, to make sure that all the wires weren't mis-matched when i extended them. But thats fine, as i crossed referenced it with a friend that has a stock civic of the same model. Now would running to rich cause my check engine light to go off? Unsure... any help would be apperciated.
-Pat