Hey Guys,

Need some insight. Time for emissions and my stang has been spitting out a P0156 code on my scanner. I replaced the sensor (driver's side, post-cat) and its still throwing out the code. The CEL isn't on again yet, but the code is pending so I know its only a matter of time.

I tried taking it in for test since the code was only pending but got a not ready status from the OBD scanner. Crap...

So, what else can cause this P0156? Obviously it wasn't the O2 sensor....but hey at least I have a bright shiny new one. Ugh.

Thanks.