P0463 on Saturn: How to Diagnose & Fix
Fuel Level Sensor Circuit High Input
1 Saturn model · 1 documented issue · $200-$500 repair
P0463 on Saturn by model: symptoms, diagnosis and fix
The fuel level sender inside the tank develops contaminated or worn contacts, sending erratic resistance signals to the gauge. Owners see the needle misread, drop or stick especially below a quarter tank, give false low-fuel warnings, or read empty when fuel remains. Disconnecting the battery can also throw off gauge calibration. The sender is part of the in-tank fuel pump module.
Common Symptoms
- Fuel gauge reads inaccurately or fluctuates
- Needle sticks, drops, or reads empty with fuel in tank
- False or premature low-fuel warning light
- Gauge misbehaves after a battery disconnect
How to Fix
Replace the fuel level sensor/sending unit, which generally requires dropping the fuel tank and is most economically done as part of a fuel pump module replacement. Cleaning or adjusting the sender float is a temporary fix at best. A P0463 code points to the level sensor circuit.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine GM 15856782 fuel-level sensor kit
Confirm VIN, engine, tank opening and module configuration; not 2006-2007.
- Genuine GM 19332414 fuel-level sensor kit
Confirm VIN/RPO, tank/module and whether 15947543 is required on the specific 2007 2.2L configuration.
- Genuine GM 15947543 fuel-level sensor/module-cover kit
Certain 2007 Saturn Ion 2.2L configurations only; retailer's main fitment table emphasizes Cobalt, so require VIN confirmation against the GM Ion catalog before purchase.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
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 Saturn?
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 Saturn it is documented across 1 model: Ion.
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 Saturn?
Published repair estimates on Saturn range from $200 to $500 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.
Looking for P0463 on a different make?
View P0463 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.