P0463 – Meaning, Causes, Symptoms, & Fixes
Code P0463 Definition
Fuel Level Sensor Circuit High Input
What Does P0463 Mean?
The P0463 code is triggered when your vehicle’s powertrain control module (PCM) detects inaccurate fuel level readings from the fuel level sensor. The fuel level sensor alerts the PCM of the amount of fuel in the fuel tank. As a result of this code, the check engine light is illuminated due to the fuel level sensor indicating there’s more fuel in the tank than the tank can physically hold.
What Are the Symptoms of Code P0463?
- Check engine light
- Fuel light
- Fluctuating fuel gauge
What Causes Code P0463?
- Faulty fuel level sensor
- Faulty fuel level pump
- Malfunctioning fuel level sensor float
- Damaged fuel tank
- Frayed wiring/connection to fuel sensor harness
How Serious Is Code P0463? -Low
This trouble code will not prevent your vehicle from running. The most common result(s) is being unable to tell the fuel level of your vehicle. However, if left unsolved, this code could increase the likelihood of your vehicle running out of gas putting the driver into an inconvenient situation.
Code P0463 Common Diagnosis Mistakes
Prematurely replacing the Fuel level pump before attempting to visually inspect the wiring around the fuel level sensor for chafed/frayed wiring.
Tools Needed to Diagnose:
How to Diagnose and Repair Code P0463:
Difficulty of Diagnosis and Repair – (1-4)
- Check to see if there are any other codes along with P0463 and clear your Check Engine Light with FIXD.
- Check the freeze frame data and fuel gauge in order to pinpoint the issue (whether there is more or less gas in the tank than there actually is).
- Test the fuel gauge reading by adding a couple gallons of gas to your vehicle and inspecting the fuel gauge after fueling to verify an accurate fuel reading.
- Conduct a visual inspection of wiring around the fuel level sensor and surrounding harness for fraying or disconnection.
- If the problem persists, consider replacing the fuel pump.