Faulty fuel sending unit

A faulty fuel sending unit causes inaccurate fuel gauge readings, making it difficult to determine how much fuel is in the tank. Symptoms include the fuel gauge staying at full or empty, fluctuating erratically, or showing incorrect fuel levels. The fuel sending unit consists of a float, resistor, and sensor, which send data to the fuel gauge. Common causes of failure include a worn-out float arm, corroded electrical contacts, or a stuck sensor. If ignored, drivers may run out of fuel unexpectedly or overfill the tank, leading to fuel spillage. Diagnosing the issue involves testing the sending unit’s resistance and checking for wiring faults. Replacing the faulty unit restores accurate fuel level readings, preventing breakdowns due to misjudging fuel availability.

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