cadillac code p1320

Question

code p1320 my cadillac how I CAN FIX

Answer 1

Ihave a 2001 hyundai elantra that had code p500-vss sensor output--i replaced it and now the car wont shift out of low gear, i now have code 1529 tcm module--where is that located?-Iput the old sensor back in and now it shifts but i have both codes-whats going on???