Need Help With OBDII CODE READER

I hook my OBD11 code reader up to the car and the codes that were displayed back to me are P1784 and P0731 my book does not have the P1784 code in it even in the generic section. The P0731 code reads in the book as GEAR 1 INCORRECT RATIO Can someone tell me what part I might need to fix for both code P1784 and P0731

1996 SEBRING LXI V6

THANKS