thanks guys, sorry it took so long to repy. i went and bought another OE sensor from the dealer just to verify that it was not a bad sensor. same issues with this one as others. slightly more activity on the voltage but still between 0.4-0.6 V. i dont know what else it could be besides the ECM other than possible a corroded ground somewhere. how can i verify 100% that it is the ECM before i spend that kind of money to fix it? any other suggestions? Thanks again