Catalyzes the omega-hydroxylation of various fatty acids (FA). Acts on saturated and unsaturated fatty acids with chain lengths from C12 to C18 but not on hexadecane. an omega-methyl-long-chain fatty acid + O2 + reduced [NADPH--hemoprotein reductase] = an omega-hydroxy-long-chain fatty acid + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Expressed in roots. By abscisic acid (ABA), the ethylene precursor ACC, mannitol or cold treatment. Down-regulated by auxin and salicylic acid (SA). Belongs to the cytochrome P450 family.