DTC P0463: Fuel Gauge Sending Unit Circuit, High Input: Condition
WARNING: This page is about a different car, the 2002 Mazda Protege5 and 2002 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when input voltage from fuel gauge sending unit is more than 4.9 volts for 5 seconds. This is a continuous monitor. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- Fuel gauge sending unit malfunction.
- Open or poor connection in wiring.
- PCM malfunction.