[Walt White Coupe]

So I ran a "Carly" diagnostic today and while I'm getting no indication on the dashboard of an engine/emission problem, it came up with downstream Oxygen Sensor Cat 2 internal resistance too high. And "12AC04" downstream Oxygen Sensor Cat 2 electric cable disruption.

So it sounds like to me that the problem is probably with the connector that the downstream oxygen sensor on the drivers side connects to and may be the culprit and needs looking into.

I've looked through numerous youtube videos but I can't find any about how to replace the #2 downstream oxygen sensor in my 2013 650ix with the N63B44TU engine.

Can anyone point me to a procedure on line for replacement so I can see how complicated it is and whether I should try to replace the sensor myself. I figure if I get down to it, I might as well just replace the sensor rather than dicking around with it.

And just for starters, do you attack it from the top or from the bottom of the engine.

Thanks in advance for any help you can provide.