i have an OBDII code P0720, which is "output speed sensor malfunction". I have once already replaced the vehicle speed sensor on the rear axle (the ABS/Brake light thing at about 65k). I now have 115k. Is this code referring to the same sensor, or is there another i should be looking at? I am having trouble finding layman's explanations of the codes.

truck is a 2000 model 4x2 with the 5.9 and automatic.

 

I'm not sure but it could be referring to the one on the tranny. there are 2 of them and I'm not sure why.