Changing the Camshaft Timing Oil Control Valve Sensor.

Yes, it was

ok, this may not apply to your toyota but try it any way, start the vehicle and keep foot on gas only a little bit try and hold it around 1500 RPM for a few minutes or untill the engine warms up it should stay running after that, if not you may need a scanner to reset the adaptives for the computer to relearn idle point, this happened to me on a 1993 chevy lumina z34 after i had replaced the alternator.