P0463 on Chevrolet
Fuel Level Sensor Circuit High Input
P0463 on Chevrolet vehicles indicates fuel level sensor circuit high input. Au7o has documented this code across 2 Chevrolet models — most commonly on Colorado, HHR. 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 Chevrolet range from $150 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 Chevrolet by Model
Chevrolet Colorado(1 issue)
- Fuel Level Sensor Failure Causing Inaccurate Gauge and Empty Reading2004-2012
A common first-generation Colorado problem is failure of the fuel level sending unit, causing the gauge to read empty, fluctuate, or become inaccurate even with fuel in the tank. Owners often see the low fuel light come on unexpectedly or the gauge drop after fill-up. GM trucks of this era had widespread sender wear issues, and Colorado complaints and forum reports show the same pattern.
Chevrolet HHR(1 issue)
- Inaccurate / Fluctuating Fuel Gauge (Fuel Level Sensor)2006-2011
HHR owners frequently report the fuel gauge reading incorrectly or bouncing around unpredictably while driving, sometimes stuck on empty or full. The cause is the fuel level sensor inside the tank: the contact fingers that slide across the resistor card wear out or get fouled by fuel deposits, sending an erratic signal to the gauge. Bad readings can also coincide with ABS/traction warnings due to shared wiring or BCM issues.
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View P0463 across all makes →Frequently Asked Questions
What does P0463 mean on Chevrolet?▼
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 Chevrolet specifically, this code is documented across 2 models.
What causes P0463 on Chevrolet vehicles?▼
Common causes on Chevrolet: 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 Chevrolet?▼
Repair costs on Chevrolet range from $150 to $900, depending on the specific model and root cause.
Which Chevrolet models have P0463 documented?▼
Au7o has documented P0463 on 2 Chevrolet models: Colorado, HHR.