P0460 on GMC
Fuel Level Sensor Circuit Malfunction
P0460 on GMC vehicles indicates fuel level sensor circuit malfunction. Au7o has documented this code across 1 GMC model — most commonly on Sierra 3500HD. This code means the powertrain computer sees a problem in the fuel level sensor circuit, the sender unit inside your fuel tank that tells the gauge and computer how much fuel is present. The reading may be erratic, stuck, or not changing as fuel is used, which the computer flags as a malfunction. While it mainly causes an inaccurate or erratic fuel gauge, the computer also uses fuel level for some emissions (EVAP) tests, so it can affect monitor readiness. It generally points to the sending unit or its wiring rather than the engine itself. Typical repair costs on GMC range from $250 to $900, depending on the specific model and root cause.
Common Causes of P0460
- •Faulty fuel level sending unit (float/sensor) in the tank
- •Corroded or worn sensor resistor card
- •Damaged or shorted wiring to the fuel level sensor
- •Loose or corroded connector at the tank or harness
- •Stuck or broken float arm
- •Poor ground in the fuel sender circuit
- •Faulty instrument cluster or PCM (less common)
P0460 on GMC by Model
GMC Sierra 3500HD(1 issue)
- Fuel Tank Strap and Fuel Sender Unit Corrosion Causing Fuel Gauge Inaccuracy2007-2014
On 2007–2014 Sierra 3500HD models, the fuel tank mounting straps and the fuel level sender unit are prone to corrosion, causing inaccurate fuel gauge readings and in some cases complete sender failure. NHTSA complaint data documents numerous owners reporting sudden fuel gauge drops to empty or erratic readings unrelated to actual fuel level. The plastic float arm on the sender can also crack, exacerbating the problem.
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What does P0460 mean on GMC?▼
P0460 stands for "Fuel Level Sensor Circuit Malfunction." This code means the powertrain computer sees a problem in the fuel level sensor circuit, the sender unit inside your fuel tank that tells the gauge and computer how much fuel is present. The reading may be erratic, stuck, or not changing as fuel is used, which the computer flags as a malfunction. While it mainly causes an inaccurate or erratic fuel gauge, the computer also uses fuel level for some emissions (EVAP) tests, so it can affect monitor readiness. It generally points to the sending unit or its wiring rather than the engine itself. On GMC specifically, this code is documented across 1 model.
What causes P0460 on GMC vehicles?▼
Common causes on GMC: Faulty fuel level sending unit (float/sensor) in the tank, Corroded or worn sensor resistor card, Damaged or shorted wiring to the fuel level sensor, Loose or corroded connector at the tank or harness, Stuck or broken float arm. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0460 on a GMC?▼
Repair costs on GMC range from $250 to $900, depending on the specific model and root cause.
Which GMC models have P0460 documented?▼
Au7o has documented P0460 on 1 GMC model: Sierra 3500HD.