P0463 on Infiniti
Fuel Level Sensor Circuit High Input
P0463 on Infiniti vehicles indicates fuel level sensor circuit high input. Au7o has documented this code across 2 Infiniti models — most commonly on FX35, M35. 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 Infiniti range from $300 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 Infiniti by Model
Infiniti FX35(1 issue)
- Fuel Gauge Sending Unit Failure2003-2012
A common Nissan/Infiniti issue on this era of FX35 is inaccurate fuel level readings caused by wear or contamination of the fuel level sending unit inside the tank. Owners report the gauge sticking, dropping suddenly, or showing empty with fuel still in the tank, sometimes accompanied by a check engine light.
Infiniti M35(1 issue)
- Fuel Gauge Sending Unit Failure2006-2010
Some M35 owners report inaccurate fuel level readings, including gauges that stick, read empty when fuel remains, or fluctuate unexpectedly. The issue is commonly related to wear or contamination in the fuel level sending unit inside the tank, which can affect trip planning and trigger low-fuel warnings incorrectly.
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What does P0463 mean on Infiniti?▼
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 Infiniti specifically, this code is documented across 2 models.
What causes P0463 on Infiniti vehicles?▼
Common causes on Infiniti: 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 Infiniti?▼
Repair costs on Infiniti range from $300 to $900, depending on the specific model and root cause.
Which Infiniti models have P0463 documented?▼
Au7o has documented P0463 on 2 Infiniti models: FX35, M35.