I m having problems with my 04 the damn check engine light is on and i says my ciruit voltage on o2 sensor num 1 is low. ive replaced it twice and it still does it. i can take the chip reset it and it may be 6 months b4 it does it or it may do it often at times. strange cant figure it out

Have you check the wires going to the sensor? Could have a broke wire that is cause the problem