DTC P00BD-00: Mass or Volume Air Flow 'A' Circuit Range/Performance - Air Flow Too High: General Description
WARNING: This page is about a different car, the 2024 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.
Mass Air Flow Sensor (MAFS) is measure the mass of intake air entering the engine, and send the signal to ECM. A large amount of intake air represents acceleration or high load conditions while a small amount of intake air represents deceleration or idle. The ECM uses this information to control the EGR valve and correct the fuel amount.