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.
Circuit Description
Fuel level sensor changes resistance based on fuel level. When fuel tank is full, sensor resistance is high. PCM monitors changes on signal circuit to determine fuel level. This information is sent to fuel gauge.
Diagnostic checks for stuck fuel level sensor signal. If PCM determines fuel level signal appears to be stuck based on lack of signal variation, DTC will set.
DTC will set when the following conditions are present:
- Fuel level left fuel tank indicates does not decrease by at least 0.8 gallon (3 liters).
- More than 150 miles have been accumulated.
NO RELATED
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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.