OK, so I have an APEXi turbo timer in my car, and one of the display options is o2 voltage and another is air fuel ratio, and the AFR doesn't show up. The weird thing is that the o2 voltage, just say, for warm idle reads about 2.62 on the readout, and my question is is there some trick to the readout on these things, or is it possible there's a wideband already on the car?