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.
Test Step 1 - Check Fuel Pump Operation
- Turn the ignition on.
Diagnose and repair any fuel pump control circuit or relay DTCs before continuing with this test.
- With a scan tool, actuate the fuel pump control to ON (100%).
It may be necessary to use a mechanics stethoscope in the next step.
- Listen for fuel pump operation at the fuel tank. The fuel pump should operate smoothly, without excessive noise. If necessary, compare to a known good vehicle of similar year, make, and model.
If the pump has excessive noise or grinding, the pump should be replaced.
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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.