sorry for the repost but i decided to start a new thread with more details...

Hey, I posted a week or two ago about a check engine light that I suddently got. Well I got a code 141 which has to do with the primary o2 sensor's heater circuit malfunction. A few sources said that I would be able to replace my o2 sensor and the problem would be fixed. I bought an OEM Honda o2 sensor and got it replaced about a week ago. The CEL went away and all was well for that period. However, yesterday the light came back on and it's been really frustrating as to wether or not I wasted $250 or so on a new o2 sensor if something else could have fixed it. Well my question is if the heater circuit is located in the o2 sensor or outside of it. What can I do to fix this sort of malfunction? Btw, my car is a 96 Prelude VTEC with about 57K miles on it.