P0464: Fuel level Sensor Circuit Intermittent — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
The monitored signal from the fuel-level sensor circuit is intermittent or unstable. This identifies an irregular signal rather than proving that the physical quantity changes abruptly or that the sensor itself is faulty. Connections, wiring and event conditions need to be assessed using the vehicle-specific service information.
Affected system: Fuel level sensing
Symptoms
- The fuel gauge may jump, remain at an implausible level or become intermittent.
- The estimated remaining range may be unreliable, and an engine warning can appear.
Possible causes
- Loose, corroded or damaged wiring and connectors at fuel-level sensor A can interrupt its signal.
- A worn or sticking float mechanism or a fault inside the level sender may also cause erratic readings.
What to check
- Read related instrument-cluster and powertrain faults and compare reported fuel level with the gauge behavior.
- Inspect accessible sensor wiring and connections for moisture or corrosion; test the sender and circuit to the exact vehicle specifications without opening the fuel system unnecessarily.
Also written as: P0464-00, P046400, PO464 (some scan tools add the fault-type byte, e.g. -00).