The check engine light just came on in my 97 Geo Prizm and the code says P0141. From doing a little googling it sounds like it may not be a faulty O2 sensor, but could just be bad wiring or another similar problem. I haven't been able to find anything about what I should check out in my specific car though. Any suggestions on what I should do before replacing the O2 sensor? Thanks, Dave Johansen