your CFFF (cold fuel flow factor) of your fuel filter is to low...or your filter needs changed, and or your fuel heater in the top of filter head is not working. or your lift pump is weak. cuz your ip is pulling on the filter head, and triggering the light. the Ip has a transfer pump in it that, can pull on the fuel, the switch in the filter head is like 1lb of neg pressure or a vacume. to trigger, the light.