And the sludge monster lives, as far as it seems!
I figured out why the oil light was coming on. I got under the car and first thing I saw was this:
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3259.jpg[/img]
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3260.jpg[/img]
So that was like, BINGO! Apparently I forgot the 12mm wrench probably on the knock sensor, because I was taking pictures to post them up on the forum. While driving that wrench flew off and hit the wire causing it to rip. Thus me getting the oil light a day after I changed the knock sensor!
So I got to fixing it
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3261.jpg[/img]
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3262.jpg[/img]
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3265.jpg[/img]
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3267.jpg[/img]
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3271.jpg[/img]
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3274.jpg[/img]
Finally everything place and ducted away
[img]http://i160.photobucket.com/albums/t188/covertrussian/Sentra%20SE-L/Maintenance/Oil Pressure Sensor/Cimg3275.jpg[/img]
So far the car has been fine, no oil light. I think some damage was probably done due to lack of oil pressure for about 250 miles. Hopefully nothing too serious.