What could lead to low fuel transfer pump pressure?

Low fuel transfer pump pressure can indeed be caused by a plugged fuel filter. The fuel filter is designed to remove contaminants from the fuel before it reaches the engine. When the filter becomes clogged, it restricts the flow of fuel to the transfer pump. This restriction can lead to insufficient fuel being delivered, resulting in lower pressure.

In a typical fuel system, optimal pressure is essential for proper engine performance. If fuel cannot flow freely due to a blockage in the filter, it creates a situation where the transfer pump has to work harder to push fuel through, ultimately leading to reduced pressure output. Regular maintenance of the fuel filter is important in ensuring efficient fuel flow and maintaining adequate pump pressure.

Other potential causes, while relevant, would not specifically address low pressure due to the immediate blockage that occurs in the fuel line when a filter is plugged.