Moves:
4x4x4 OLL Parity
2R' - U2 - 2L - F2 - 2L' - F2
2R2 - U2 - 2R - U2 - 2R' - U2
F2 - 2R2 - F2
Visual here.
4x4x4 PLL Parity:
(R U R' U') - 2R2 - U2 - 2R2 - u2 - 2R2 - u2 - (U' R U' R')