Power control device and vehicle having the same

An embodiment power control device includes a power converter configured to convert a first voltage of a first battery to a second voltage lower than the first voltage of the first battery and to supply a power via the second voltage, a power distributor configured to distribute and supply the power supplied from the power converter to a plurality of low-power loads including an autonomous driving control device, and an integrated central control unit (ICU) configured to be connected to the power converter, the power distributor, and the autonomous driving control device through a plurality of communication networks, to determine a first failure in a first communication module provided in the power converter or a second failure in communication lines of the plurality of communication networks, and to transmit failure information about the first failure or the second failure to the autonomous driving control device.