P0463 on Hyundai
Fuel Level Sensor Circuit High Input
P0463 on Hyundai vehicles indicates fuel level sensor circuit high input. Au7o has documented this code across 1 Hyundai model — most commonly on Elantra. This code means the fuel level sensor is reporting a voltage that is higher than the computer expects, which usually translates to a reading suggesting the tank is fuller than possible (such as more than full). The fuel level sensor is the float-and-sender unit inside the fuel tank that tells the gauge and computer how much fuel remains. A high-input signal points to an electrical problem like a short to voltage or an open in the sensor circuit, rather than an actual fuel issue. Besides an inaccurate or pinned fuel gauge, it can disturb EVAP system monitoring that uses fuel level data. Typical repair costs on Hyundai range from $350 to $900, depending on the specific model and root cause.
Common Causes of P0463
- •Faulty fuel level sensor/sending unit (float stuck or worn)
- •Open circuit in the fuel level sensor wiring
- •Short to voltage in the sensor circuit
- •Corroded or loose connector at the tank or sending unit
- •Damaged or stuck float arm inside the tank
- •Faulty instrument cluster or gauge driver
- •Faulty PCM/ECM (rare)
P0463 on Hyundai by Model
Hyundai Elantra(1 issue)
- Fuel Pump Module and Fuel Level Sender Failure Causing No-Start or Inaccurate Gauge Readings2001-2006
Owners of 2001-2006 Elantras frequently report in-tank fuel pump module problems, including hard starting, no-start conditions, and erratic fuel gauge behavior due to sender wear. On higher-mileage cars, the pump can become weak or fail intermittently, especially after hot soak. Forum reports and repair histories commonly pair pump replacement with sender issues because both are integrated in the tank module.
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What does P0463 mean on Hyundai?▼
P0463 stands for "Fuel Level Sensor Circuit High Input." This code means the fuel level sensor is reporting a voltage that is higher than the computer expects, which usually translates to a reading suggesting the tank is fuller than possible (such as more than full). The fuel level sensor is the float-and-sender unit inside the fuel tank that tells the gauge and computer how much fuel remains. A high-input signal points to an electrical problem like a short to voltage or an open in the sensor circuit, rather than an actual fuel issue. Besides an inaccurate or pinned fuel gauge, it can disturb EVAP system monitoring that uses fuel level data. On Hyundai specifically, this code is documented across 1 model.
What causes P0463 on Hyundai vehicles?▼
Common causes on Hyundai: Faulty fuel level sensor/sending unit (float stuck or worn), Open circuit in the fuel level sensor wiring, Short to voltage in the sensor circuit, Corroded or loose connector at the tank or sending unit, Damaged or stuck float arm inside the tank. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0463 on a Hyundai?▼
Repair costs on Hyundai range from $350 to $900, depending on the specific model and root cause.
Which Hyundai models have P0463 documented?▼
Au7o has documented P0463 on 1 Hyundai model: Elantra.