What is one consequence of low fuel pressure indicated by warning lights?

Low fuel pressure is a critical condition in an aircraft's fuel system that can significantly affect engine performance. When warning lights indicate low fuel pressure, it typically suggests that the fuel delivery to the engine is insufficient. This lack of adequate fuel flow can lead to a scenario where the engine does not receive the necessary fuel to maintain proper operation, which may ultimately result in engine failure.

The engine relies on a precise fuel-air mixture for combustion, and if fuel pressure drops too low, this mixture can become too lean. A lean mixture can cause knocking, rough operation, and even complete engine shutdown due to insufficient fuel reaching the combustion chambers. As a result, a warning light indicating low fuel pressure serves as a crucial alert to the pilot about potential engine failure, making it vital to address the issue immediately to ensure safe operation of the aircraft.