Powertrain Control Modules (ECM/PCM/ECUs) are responsible for monitoring fuel level sensor signals. The information obtained from this sensor is used to adjust fuel gauges on the instrument panel to reflect the actual amount of fuel remaining in the tank, and to alert the driver. P0463 is a fault code that occurs when the fuel sensor indicates higher fuel levels than the actual fuel levels.
The fuel gauge may not display the correct amount of fuel in your tank if you have the P0463 code. You may run out if you don’t know how much petrol is in your tank.
Note: While the P0463 is a code that has been specified by the Society of Automotive Engineers, the definition of this code can vary depending on which vehicle manufacturer you are dealing with.
Table of Contents
What Causes Fault Code P0463?
The ECM may store the P0463 code for a variety of reasons.
- Fuel level sensor circuit fault
- Faulty fuel level sensor
- Fuel float that is not working properly
- Fuel tank that is damaged or dirty
- If present, a faulty smart fuse box (or integrated power module)
- ECM failure is unlikely
What are the symptoms of fault code P0463?
- The engine fault light illuminating
- Fuel gauge that fluctuates and is faulty
- Fuel light that is constantly lit or blinks at intervals
- The Low Fuel Warning Chime will sound
How to Fix Fault Code P0463?
The most common mistake involves replacing the fuel filter without checking. Check the fuel level sensor and the fuel gauge, and perform all necessary tests. Check the connectors and cables to determine if there is a system short.
- Fuel tank repair or replacement
- Repair or replace the fuel float
- Repair or replace the fuel level sensor
- Replace the fuel level sensor wire harness
- Tightening a loose connector in the fuel sensor circuit
How Serious is Fault Code P0463?
This code is not a danger to the vehicle. You may run out of gas and end up stranded if you don’t know the amount left in your car. It is in the best interest of the driver to have it repaired when convenient.
Relevant Fault Codes
- P0460 Fuel Level Sensor Circuit Malfunction
- P0461 Fuel Level Sensor Circuit Range/Performance
- P0462 Fuel Level Sensor Circuit Low Input
- P0464 Fuel Level Sensor Circuit Intermittent
