P0463 means Fuel Level Sensor A Circuit High. The fuel level sender signal is higher than expected, often from an open circuit. It is a generic OBD-II code, so the definition is the same on any make, but the most likely cause varies by engine; confirm with a scan tool and the service information for your vehicle before buying parts.
What P0463 means
Most engine sensors receive a 5-volt reference and return a signal between roughly 0 and 5 volts. Codes ending in circuit high or circuit low usually point to an electrical fault: an open circuit, a short or an unplugged connector. Range/performance codes mean a signal is present but disagrees with what the computer expects from the other sensors, which more often points to a dirty sensor, an air leak or a mechanical problem.
P0463 symptoms
- Fuel gauge reading wrong, stuck or jumping
- Low fuel warning at the wrong time
- Check engine light
Common causes of P0463
- Worn sender resistor track or stuck float
- Wiring or connector fault at the tank
- Instrument cluster or module fault
How to diagnose P0463
- Compare the gauge with the scan tool reading
- Check the sender connector at the fuel pump module
- Measure sender resistance at empty and full positions
Can you drive with P0463?
Yes, but track mileage so you do not run out of fuel.
P0463 tips
An open circuit reads high on many vehicles; check the ground at the fuel pump module.
Will P0463 clear itself?
If the fault stops, the computer turns off the check engine light by itself after several drive cycles without seeing it again, and the code stays in memory as history for a while. Clearing P0463 with a scan tool after a repair is fine, but if the cause is still there the code returns, sometimes within one drive. Disconnecting the battery also clears codes on most vehicles, but it erases learned fuel trims and idle settings as well.
Related codes
| Code | Meaning |
|---|---|
| P0460 | Fuel Level Sensor A Circuit |
| P0461 | Fuel Level Sensor A Circuit Range/Performance |
| P0462 | Fuel Level Sensor A Circuit Low |
Guides that help
- fuel pump, filter and regulator symptoms
- how to use an OBD2 scanner
- check engine light: solid vs flashing
When it is more than a sensor
Sensor codes are usually fixed with a sensor, a connector, wiring or a leak repair rather than major parts. If testing turns up internal engine trouble instead, see how to tell if an engine is blown and compare engines by code on our engines page.
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