Just checked out our little code book that came with our obd II reader and
P1000: OBD Systems Readiness Test Not Complete
P1400: Differential Pressure Feedback EGR Circuit Low Input
According to my book then the first number is 1 that means the code is Make specific. These are the definitions for Ford for the codes that you gave. If the first number is 0 then the code is generic and all Makes have the same definitions for the same number.