The IMRC (Intake Manifold Runner Control) system regulates and controls the intake of air once it comes into the engine. When engine speed levels are low, the airflow decreases to reduce exhaust emissions. On the other hand, when the rpm increases, this system atomizes the fuel to increase engine performance through an effect created by it.
The Intake Manifold Runner Control consists of some flaps that are attached to a rod that passes through the intake ports of each of the cylinders. The movement of the flaps is uniform. They are attached to a singular rod controlled by the same actuator. It is necessary to state that each bank has a rod, actuator, and other components that operate independently of the other banks.
The PCM relies on input data from various engine sensors to calculate the required grade for the IMRC components. After the PCM has applied the necessary voltage to the circuit for the Intake Manifold Runner Control adjustments, the sensor data is monitored to verify that the changes have been successfully made. In case the PCM detects the IMRC system could not be effectively controlled, the P200A OBDII fault code will be set.