The DTC code P2016 OBD2 is related to the value delivered by the Intake Manifold Control Sensor (IMRC) which is located near the intake manifold. This sensor provides the Powertrain Control Module (PCM) with information to control the amount of air that will get the engine at various rpm.
This code specifies that the fault is caused by low voltage in the IMRC Sensor circuit, so the Check Engine light next to this code is turned on.