All i have to say is i started it yesterday and still cant get to it . i belive i acctually located it on a V8 5.2 L grand cherokee limited i went from the left side of the engine (IE facing the front of the vehical) Removed the ECU, the Coolant Container, the heat shield, if you can get it off, i just bent mine , and there is this metal like hose that connects to the engine with 2 10 MM bolds after you removed the bolts it just slides up and u can put ur hand in there..
now how i located the plug, i went down the right side of the jeep ( remeber this is all in the rear of the engine where the Spark plug wires all bunch of, the CAP or whatever.. anyways, i used a light and looked around it might take a bit of spotting but once you found the plug looks similar if you buy the new part u can spot if quicker, unplug it
Now reach in the left side and pull it out so now you can guide your fingers to the sensor.. how to see the sensor or how to remove it.. well... Good luck ill let you know how i do, i just happend to have a mini wireless camera im gonna try to stick in there to visualize how to remove it it and god i hope i have the right sensor!
my aim is clonedforever if you have any questions,