To explore the effects of higher order coupling on the barrier distribution, we have measured the quasielastic excitation function for 12C+142Nd around the nominal Coulomb barrier from 44 to 58 MeV in steps of 1 MeV.Theoretical coupled channel calculations with one and two phonon states were performed using the code ECIS94 . The analysis showed that the second order coupling effects explained the barrier distribution profile and excitation function more appropriately than the first order couplings.