P0463 on Jeep: How to Diagnose & Fix
Fuel Level Sensor Circuit High Input
4 Jeep models · 5 documented issues · 1 critical · $200-$800 repair
P0463 on Jeep by model: symptoms, diagnosis and fix
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.
Common Symptoms
- Fuel gauge stuck on Full or Empty
- Gauge reading bounces or drops erratically
- 'Service Fuel Level Sensor' warning message
- Inaccurate Distance-to-Empty / range readout
- P2068 or related fuel-level codes
- Gauge slow to rise after fill-up
How to Fix
Scan for P2068/P0461/P0463 and confirm which sender is faulty. Inspect the sender for a stuck float and check connector/wiring; some intermittent stuck floats free up, but a failed sender requires replacement of the affected fuel-level sensor/sender module (often the in-tank pump/sender assembly), which typically means lowering the fuel tank. Recalibrate/verify gauge sweep after repair.
Sources for this issue (3)
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. A no-start and a jumpy fuel gauge often trace to the same module.
Common Symptoms
- Cranks but won't start / low fuel pressure
- Stalling when hot or when tank is low
- Erratic, stuck, or inaccurate fuel gauge
- Whining or silent fuel pump on key-on
- Long crank before start
How to Fix
Fuel-pressure test before replacing. Replace the complete in-tank fuel pump module assembly (Mopar module by application, or quality aftermarket Airtex/Spectra/Delphi for 1999-2004 WJ) rather than just the pump. If the gauge stays erratic after replacement, check the tank-to-cluster wiring/grounds and the instrument cluster gauge circuit. Avoid bending the float arm on install.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mopar 5018056AC complete fuel-pump and level-sender moduleOEMMopar 5018056AC
Complete module replacement after vehicle-side electrical, pressure/volume and sender diagnosis confirms failure Fitment/availability: The exact page lists 5018056AC with 5012380AD and multiple OE/aftermarket crosses for 1999-2004 WJ 4.0…
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Sources for this issue (2)
The fuel level sender, part of the in-tank pump module, is a high-frequency failure on both generations. The card-and-wiper resistive sender wears open, so the gauge behaves in characteristic patterns owners document repeatedly: reading correctly for a while and then dropping to empty with the low-fuel light on, recovering after a fill-up; falling to zero on a turn or grade and returning after a few minutes of straight driving; or pinning to full regardless of tank contents. Forum consensus is that the sender, not the pump, is the culprit in the overwhelming majority of cases, with the remainder being a corroded connector at the pump module. The practical hazard is running the tank dry with no warning, which then stresses the fuel pump.
Common Symptoms
- Fuel gauge drops to empty then recovers
- Low fuel light on with a full tank
- Gauge reads full at all times
- Gauge fluctuates on turns or hills
- Check engine light with fuel level sensor code
How to Fix
Distinguish the failure before ordering parts: a gauge that always drops out at the same fuel level points to the sender card; a completely random gauge points to the connector at the top of the pump module. Inspect and clean that connector first. The sender is sold separately from the pump on many applications, but because access requires dropping the tank most owners replace the complete fuel pump/sender module once while it is out - the labor, not the part, is the cost. Note that the module can physically separate inside the tank; one documented case was resolved simply by snapping the pump and sender back together. No recall covers this.
Sources for this issue (3)
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. It is sometimes accompanied by an inaccurate fuel gauge from the same module.
Common Symptoms
- Loud whine/hum from the fuel tank
- Extended cranking / hard start
- Stalling under load or when low on fuel
- Crank but no-start
- Erratic fuel gauge
How to Fix
Replace the complete fuel pump module (not just the motor) after confirming low fuel pressure. Match the tank size: 97-02 TJ 19-gallon uses modules such as Bosch 67756 / Omix; 03-04 TJ 2.4L/4.0L uses Crown 5093788AA. Inspect the tank and strainer, and replace the pump-to-tank seal. Verify 15- vs 19-gallon tank before ordering.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Crown 5012951AD complete fuel-pump/level moduleOEMCrown 5012951AD
Replace a confirmed failed complete module in the small-tank early branch Fitment/availability: 1997-1999 Wrangler TJ 2.5L or 4.0L with 15-gallon tank only; verify tank capacity and connector before ordering.
- T-Rex TREXTJFM-2 complete 19-gallon fuel module replacing 5012952ADOEMT-Rex TREXTJFM-2 / replaces 5012952AD
Replace a confirmed failed complete module in the 19-gallon early branch Fitment/availability: 1997-2002 Wrangler TJ 2.5L or 4.0L with 19-gallon tank only; verify tank capacity, connector and sender resistance before ordering.
- Crown 5093788AA complete fuel moduleOEMCrown 5093788AA / Mopar 5093788AB
Replace a confirmed failed complete module in the 2003-2004 branch Fitment/availability: 2003-2004 Wrangler TJ/Unlimited 2.4L or 4.0L; select exact 5093788AA/AB module and verify VIN/connector. Do not use an early 15- or 19-gallon module.
- Crown 5161335AF complete fuel module with O-ringOEMCrown 5161335AF
Replace a confirmed failed complete module in the 2005-2006 branch Fitment/availability: 2005-2006 Wrangler TJ/Unlimited 2.4L or 4.0L; verify VIN/connector and sender resistance.
- Mopar 52018808 fuel-pump/level-module sealOEMMopar 52018808
Some complete modules already include a seal, so do not duplicate unnecessarily.
- Crown 55366298AA fuel-module O-ringOEMCrown 55366298AA
Renew the tank-to-module seal when servicing the late TJ module Fitment/availability: 2005-2006 Wrangler TJ/Unlimited; later-style O-ring. Some complete modules already include it, so check kit contents before ordering.
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Sources for this issue (2)
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.
Common Symptoms
- Fuel gauge reads inaccurately or sticks
- Gauge freezes below a certain level
- Running out of fuel while gauge shows fuel left
- Fuel gauge jumps or drops erratically
How to Fix
Perform electrical pinpoint diagnostics from the sending unit through the Body Control Module to the cluster. The accepted repair is replacing the fuel level sending unit (often supplied as part of the in-tank fuel pump/sender module), after which the gauge reads correctly.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 68312374AB fuel-pump/level-unit moduleOEMMopar 68312374AB
Fuel-level sender/module replacement when diagnostics confirm the flex-fuel branch and no open UB2 remedy remains Fitment/availability: 2015-2018 Renegade 2.4L 948TE FWD flex-fuel/XKN branch, superseding 68254869AA/68312374AA. Confirm VI…
- Genuine Mopar 52029625AA fuel-pump/level-unit moduleOEMMopar 52029625AA
Fuel-level sender/module replacement when diagnostics and VIN identify the non-flex/general module branch Fitment/availability: Specified 2015-2021 Renegade 1.4L/2.4L AWD or FWD applications; catalog/build/fuel-type confirmation remains …
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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 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 it is documented across 4 models: Grand Cherokee, Liberty, Wrangler, Renegade.
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 Jeep?
Published repair estimates on Jeep range from $200 to $800 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.