P0463 on Hyundai: How to Diagnose & Fix
Fuel Level Sensor Circuit High Input
1 Hyundai model · 1 documented issue · $350-$900 repair
P0463 on Hyundai by model: symptoms, diagnosis and fix
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.
Common Symptoms
- long crank before starting
- engine cranks but will not start
- loss of power under load
- fuel gauge reads empty when tank has fuel
- fuel gauge fluctuates unexpectedly
How to Fix
Check fuel pressure during crank/no-start events and verify power and ground at the pump connector before condemning the module. If pressure is low or absent and wiring is intact, replace the fuel pump module or pump/sender assembly. It is also wise to inspect the tank connector and replace the fuel filter if service history is unknown.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Hyundai 31110-2D501 fuel pump and sender module assemblyOEMHyundai 31110-2D501
complete in-tank pump/sender module after pressure/electrical/sender testing confirms the integrated module branch Fitment/availability: 2001-2006 Hyundai Elantra four-door and five-door within the retailer's 2000-2006 fitment. Confirm g…
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Sources for this issue (2)
P0463 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0463 mean on a 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 it is documented across 1 model: Elantra.
What are the most common causes of P0463?
The most common causes of P0463 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0463 on a Hyundai?
Published repair estimates on Hyundai range from $350 to $900 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.