DTC P0191-00: Fuel Rail Pressure Sensor Circuit Range/Performance: 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.
The Fuel Rail Pressure Sensor (FRPS) provides a feedback signal to indicate the fuel rail pressure so the ECM can command the correct injector timing and pulse width for correct fuel delivery at all speed and load conditions.