Hi I am brand new here and was wondering if anyone on here could help me out,I have a 1998 cadillac deville with almost 109,000 miles on it,lately i have had some trouble starting it up,somtimes when I turn it over it will start right up but other times it takes 2 or 3 times to start.I pulled the codes and this is what i got pcm p1527 and irc b1771,the irc is just a dirty tape deck but the ipc is transmission range to pressure switch correlation i have no idea what this means can somone help me out?thanks