The Dirac leptonic CP phase {delta}_CP is one of the crucial unknown parameters in neutrino oscillation physics. In this paper we explore the possibility of using low energy atmospheric neutrino events to probe {delta}_CP . We show that at sub GeV energies, when the events are binned as a function of the energy and direction of the final state leptons, a consistent distinction between various true {delta}_CP values is obtained. We also show that at these energies there is no sensitivity to the mass ordering/hierarchy, so that {delta}_CP can be measured without hierarchy ambiguity. In addition a preliminary c{hi}^2 analysis of the sensitivity to {delta}_CP using atmospheric neutrinos assuming a generic detector with perfect separation between charged current { u}_{mu} , bar{{ u}}_{mu} , { u}_e and bar{{ u}}_e events is given.
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