P0463 on Jeep
Fuel Level Sensor Circuit High Input
P0463 on Jeep vehicles indicates fuel level sensor circuit high input. Au7o has documented this code across 3 Jeep models — most commonly on Grand Cherokee, Renegade, Wrangler. 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 Jeep range from $120 to $800, 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 Jeep by Model
Jeep Grand Cherokee(2 issues)
- Fuel Level Sending Unit Failure Causing Inaccurate Gauge and 'Service Fuel Level Sensor' / P2068 (WK2 Saddle Tank)2011-2021
The WK2 uses a saddle-style fuel tank with two fuel-level senders (one per lobe). The sender floats/rheostats stick or wear, and the PCM flags a sender that no longer tracks fuel consumption, setting P2068 (or related P0461/P0463) and a 'Service Fuel Level Sensor' message. Symptoms include a gauge stuck on Full or Empty, wildly bouncing readings, and an inaccurate Distance-to-Empty. It usually doesn't affect running but can strand an owner who trusts a stuck-full gauge, and it commonly requires dropping the tank to access the sender/module.
- In-Tank Fuel Pump Module Failure and Fuel-Level Sending Unit Fault (No-Start / Erratic Gauge)1999-2004
The combined in-tank fuel pump / level-sender module on the WJ Grand Cherokee wears out with age: the pump loses pressure (needs ~49-58 psi) causing crank-no-start or hot stalling, while the integrated sending-unit float/resistor card fails causing erratic or stuck fuel-gauge readings. Both a no-start and a jumpy fuel gauge are heavily searched WJ complaints and often the same module.
Jeep Renegade(1 issue)
- Fuel Level Sending Unit Failure / Inaccurate or Frozen Fuel Gauge2015-2019
Renegade owners commonly report the fuel gauge reading inaccurately, sticking, or freezing in place, often once the tank drops toward the lower quarter (owners note it can freeze around the 2-gallon point). The resistive fuel-level sending unit inside the tank module develops a bad spot on the float element, so the gauge stops tracking level correctly and drivers can unexpectedly run out of fuel while the gauge still shows fuel remaining.
Jeep Wrangler(2 issues)
- Fuel Level Sender Failure — Inaccurate/Stuck Fuel Gauge (P0463)2007-2022
The fuel-level sending unit, integrated with the in-tank fuel pump module, develops a worn resistance card or a bent/sticking float arm with age. This causes the fuel gauge to read inaccurately, stick (often above or below a certain level), drop suddenly, or trigger a false low-fuel light. On JL models it can also set P0463 (fuel-level sensor circuit high) and on inclines the gauge may briefly read empty until the vehicle is back on level ground. A persistent fault sometimes traces to chassis-harness wiring rather than the sender itself.
- In-Tank Fuel Pump Module Failure — Whine, Hard Start & No-Start1997-2006
The in-tank fuel pump module (pump, sending unit, and level float) wears out on high-mileage TJ Wranglers, producing a loud whine from the tank, hard starting, stalling, and eventual crank-no-start as fuel pressure drops. A top-searched TJ fuel-system failure, sometimes accompanied by an inaccurate fuel gauge from the same module.
Looking for P0463 on a different make?
View P0463 across all makes →Frequently Asked Questions
What does P0463 mean on Jeep?▼
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 Jeep specifically, this code is documented across 3 models.
What causes P0463 on Jeep vehicles?▼
Common causes on Jeep: 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 Jeep?▼
Repair costs on Jeep range from $120 to $800, depending on the specific model and root cause.
Which Jeep models have P0463 documented?▼
Au7o has documented P0463 on 3 Jeep models: Grand Cherokee, Renegade, Wrangler.