The fault code P0489 OBD2 means the Engine Control Module (ECM) has a problem in an electrical component of the Exhaust Gas Recirculation System (EGR). This system prevents harmful emissions from passing into the environment.
The EGR system works through the ECM so that the cylinder may keep head pressure. On the other hand, the ECM is in charge of opening or closing the EGR valve. To do this, it takes into account some things such as the vehicle’s speed, load, and temperature.
The ECM has a degree of change in the exhaust manifold. If proper exhaust flow is not detected once the EGR valve is activated, this code will be stored.