A camshaft phaser for controllably varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine includes stator having a plurality of lobes. A rotor is coaxially disposed within the stator and has a plurality of vanes interspersed with the lobes defining alternating advance chambers and retard chambers. A lock pin is disposed within the rotor for selective engagement with a lock pin seat for preventing a change in phase relationship between the rotor and the stator. A lock pin oil control valve is located within the camshaft phaser for 1) selectively receiving the pressurized oil from one of the advance chambers and directing the pressurized oil to the lock pin and 2) selectively receiving the pressurized oil from one of the retard chambers and directing the pressurized oil to the lock pin for disengaging the lock pin from the lock pin.