P0463 Fault Code

Fuel Level Sensor Circuit High Input

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0463 fault code indicates that there is a high input signal in the fuel level sensor circuit. This typically means that the engine control unit (ECU) is receiving a voltage signal that is higher than expected, suggesting a possible short circuit or a malfunction in the fuel level sensor itself.

• The fuel level sensor is responsible for sending information about the fuel level in the tank to the ECU.
• A high input signal may lead to inaccurate fuel readings on the dashboard, affecting fuel management and engine performance.

What are the symptoms of the P0463 code?

When the P0463 fault code is triggered, you might experience:

• Inaccurate fuel gauge readings on the dashboard; it may read full even when the tank is low.
• Warning lights on the dashboard related to the fuel system.
• Potential engine performance issues related to improper fuel management.

What causes the P0463 code?

Several factors can trigger the P0463 code, including:

• Faulty fuel level sensor, which could be shorted or damaged.
• Loose or corroded electrical connections in the sensor circuit.
• Damaged wiring between the fuel level sensor and the ECU.
• Defective ECU failing to interpret the sensor signal properly.

How to fix P0463?

To resolve the P0463 error code, follow these steps:

• Inspect the fuel level sensor for any physical damage and replace it if necessary.
• Check the electrical connections and wiring for signs of corrosion or loose connections; repair any issues found.
• Test the sensor with a multimeter to ensure that it is operating within the correct voltage range.
• Clear the fault codes and perform a road test to verify if the issue persists.