A na-eji ihe ABS & PC mee ntọala na nnukwu efere.ABS dị elu na-eme ka nnukwu efere ahụ ghara ịma jijiji, a na-ahọrọkwa ihe PC dị elu maka elu ihe mkpuchi.Ọbụlagodi na a kụrụ nnukwu efere ahụ n'oge egwuregwu, efere ahụ ka ga-emebi emebi.Nhazi nnukwu efere na-enwu enwu bụ nke na-eguzogidekwa ọkọ.Ọzọkwa, ihe PC na-ejigide nghọta nke iko ka mmadụ wee hụ ole pusi ma ọ bụ nkịta na-eri ma na-eme mgbanwe nri nri ya.