OBD-II Code · Sensors
P0463
Fuel Level Sensor High
Severity
low
Lowest on our scale. Fix it when convenient.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$300–$800
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Fuel level sensor voltage high.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Gauge reads full wrong
Likely causes
- Failed senderMost common
- Wiring short
Read the full diagnostic procedureP0463 means the fuel level signal voltage has stayed above the PCM's high threshold, typically over 4.6 to 4.9 volts, longer than the diagnostic wind…
P0463 means the fuel level signal voltage has stayed above the PCM's high threshold, typically over 4.6 to 4.9 volts, longer than the diagnostic window allows. This is usually a signal wire open, a failed sender stuck at full, or loss of sender ground.
Cheapest-first
- with key on, back-probe the signal pin at the sender connector.
- A reading at or near 5.0 volts (reference voltage with no load) confirms the sender circuit is open between the connector and the resistive element, either a broken pigtail, a corroded pump-flange pass-through, or a snapped float arm.
- If signal voltage is normal at the tank but the scan tool reads 5.0 volts, the wire is open between the tank and the PCM. Always verify the sender ground reads under 0.2 volts drop to battery negative with the key on; a lost ground floats the signal high and mimics an open sender.
- Expensive misdiagnosis: replacing the fuel pump module twice when the actual fault is a broken solder joint at the tank-top connector pin or a corroded ground eyelet on the frame rail.
Vehicle-specific patterns2002-2008 Dodge Ram 1500 and 2500 with the in-tank module crack the signal pin solder joint at the flange where the harness flexes during fuel sloshi…
- 2002-2008Dodge Ram 1500 and 2500 with the in-tank module crack the signal pin solder joint at the flange where the harness flexes during fuel sloshing, throwing P0463 on left turns when the tank is below half.
- 2007-2013GMC Sierra and Chevrolet Silverado 1500 lose the sender ground at the C305 body connector under the driver seat after winter salt exposure.
- 2005-2011Ford Escape and Mercury Mariner break the float arm at its plastic pivot, especially after running the tank dry repeatedly.
- 1996-2002Toyota 4Runner with the 5VZ-FE has a TSB for the tank-top connector terminal back-out causing intermittent P0463 over rough roads.
Estimated repair$140 to $620.
Look up another code
P0463 — frequently asked
What does a P0463 code mean?
Fuel level sensor voltage high.
What causes a P0463 code?
Common causes: Failed sender; Wiring short.
What are the symptoms of a P0463 code?
Typical symptoms: Gauge reads full wrong.
Is it safe to drive with a P0463 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $300-$800.
How do I diagnose a P0463 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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