Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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