They are OBD-II codes (On Board Diagnostic) its how your ECU tells you whats wrong these sites will help you out....
http://www.obdii.com/
http://autorepair.about.com/cs/troub...l_obd_main.htm
I like the second one cause it is easier to find what the codes mean....
Your codes that you posted mean....
P0732 - Gear 2 Incorrect Ratio
P0734 - Gear 4 Incorrect Ratio
As for how to fix them i dont know im not a transmission person..... good luck and hope this helped