accent codes P1529, P0740

Hi,, I took my 2000 accent to autozone and these codes came up.. what should I do now? the transmission has already been replaced once

HI,
I just bought my 2000 accent and love it...it was driven 800 miles with no problems...while away the code 1529 came up for me also at autozone...the engine light didnt come on till after the trip..the other code that came up was for the transmission fluid heater sensor or something like that..i dont know the code...but 1529 is Scair silonoid circuit malfunction...What is this please???? I have to drive another 800 miles plus and i need to make sure I can make it home....Thank you in advance for any help...AJ