O2 sensor question

[S13srdave]

From what I've read and know about O2 sensors, that if it has a voltage reading of more than .45 volts, that means that the engine is running more rich, whereas if if he sensor is reading less than .45 volts, the engine is running on the leaner side. So a reading of .02-.1 volts would mean very lean. Well, I have my consult reader and my AEM wideband telling me two different things. When the car is warming up, the O2 voltage sits at about .32 volts and my wideband is telling me that I'm running lean. However once the engine is good and warm, after getting on it a few times, my Wideband starts telling me that I'm running very rich, like 10.0-11.3 at idle, and my consult is telling me that I'm running lean at idle, around .15 volts. So, I'm wondering my car's O2 sensor is reading the car is running lean so it's adding extra fuel, which is causing my wideband to read rich, or if there's something wrong with my wideband. I'm betting it's the sensor on my car, just for the fact that the voltage always sits very low. Once the engine is warmed up, it never even hits .20 volts! Even at full throttle! What should my voltage look like upon start up and what should it look like while cruising and then really getting on it?

[S13srdave]

anyone?

[duffman1278]

Are the wideband, and the consult hooked up to the EXACT same location? If not, it could be because one is measuring the ratio before the either.

[S13srdave]

No, my wideband is on the downpipe, and my O2 is on the elbow.

[NewKleer]

cant help you much other than to say on startup the 0.3v is the o2 sensor still warming up. the o2 sensor wont give a normal reading until car is up to operating temp etc.

[S13srdave]

cant help you much other than to say on startup the 0.3v is the o2 sensor still warming up. the o2 sensor wont give a normal reading until car is up to operating temp etc.

Well that I understood. I replaced the O2 sensor today and it's doing the same thing as the old one.

[Blown240sx]

Make sure the wideband is calibrated correctly and the O2 is good. Id trust the Wideband all day before I trust the Narrow band factory unit.