Code P020, Open Fuel Pump Circuit: Notes

Fuel pump receives power from circuit No. 120 through either the fuel pump relay or oil pressure switch. PCM energizes fuel pump relay for 2 seconds after key is turned on. Fuel pump is then turned off if no 4X reference pulses are received. The oil pressure switch is provided as a backup to fuel pump relay enabling engine to start when fuel pump relay fails. Code P020 is set when PCM sees fuel pump is not energized (zero volts on feedback circuit) with engine cranking or running. PCM code is designed to detect a fuel pump relay fault (relay not powering fuel pump).