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.
Fuel Level Sensor
The fuel level sensor consists of a float, a wire float arm, and a ceramic resistor card. See Fig 1. Fuel level sensor is part of the fuel sender assembly, located in the fuel tank. See Fig 2. The position of the float arm indicates the fuel level. The fuel level sensor contains a variable resistor which changes resistance in correspondence with the amount of fuel in the fuel tank. The Powertrain Control Module (PCM) sends the fuel level information via the Class 2 circuit to the Instrument Panel (IP) cluster. This information is used for the IP fuel gage and the low fuel warning indicator, if applicable. The PCM also monitors the fuel level input for various diagnostics.
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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.