The Intake Manifold Runner Control Sensor (IMRC) is located on the engine cylinder head. Some of these sensors are accompanied by an EGR (Exhaust Gas Recirculation) valve, depending on the fuel used by the vehicle. The IMRC sensor is in charge of the air intake to the cylinders and regulates the airflow, commanded by the Powertrain Control Module (PCM).
DTC P2019 OBD2 is set when the PCM detects out-of-range voltages at the IMRC Sensor due to electrical or mechanical failures.