DTC P0463: Fuel Level Sensor Circuit - High Input: Condition
WARNING: This page is about a different car, the 2002 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0463 is set when ECM detects fuel level sensor output voltage is more than predetermined for a specified time. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.