When printing full page color, I always get a ~1.5" band on the right-side of the page where all of the colors are present except for Cyan. It turns out the problem was due to the black toner cartridge not being fully locked. The fin on the black cartridge was partially obscuring the laser from applying the cyan toner. Due to the order the cartridges are arranged on the printing carousel:
Band of missing Cyan could indicate the Black cartridge needs to be reseated.
Band of missing Magenta could indicate the Cyan cartridge needs to be reseated.
Band of missing Yellow could indicate the Magenta cartridge needs to be reseated.
Band of missing Black could indicate the Yellow cartridge needs to be reseated.
See post for answer
THIS POST by llynster helped to solve the problem.