What a pain in the arse to find that stupid thing. None of the pictures I found showed it until the above posting. And what does DP mean? I did finally find the thing though, it was beneath the header pipe/exhaust manifold.
HOWEVER I have a new problem. We cannot remove it. We took the bolt out and we can spin the sensor in its hole but we can't get it out at all. I tried using a small screwdriver and it is starting to break up to the point where I don't know how we will be able to grab ahold of it.
What do we do now? Is there a trick to getting the damned thing out?