rough idle on 99 ford explorer

Sounds like im having same issues like everyone else .. rough idle till warm up ... getting bank 1 0171 code and a bank 1 0174 ... what are these codes and what do i have to do to fix them ?? intake gasket ??

email [email protected] thanks for the help

0171 is system to lean in bank 1
0174 is system to lean bank 2
Check out http://www.visi.com/~rhanson/obdII_codes-full-text.htm