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.

P0463 Symptoms

  • Check engine light
  • Fuel light
  • Fluctuating fuel gauge

P0463 Causes

  • Faulty fuel level sensor
  • Faulty fuel level pump
  • Malfunctioning fuel level sensor float
  • Damaged fuel tank
  • Frayed wiring/connection to fuel sensor harness

Code P0463 Severity – 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.

P0463 Diagnosis

  • Tools Needed to Diagnose:

Difficulty of Diagnosis and Repair – (1-4)

  1. Check to see if there are any other codes along with P0463 and clear your Check Engine Light with FIXD.
  2. 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).
  3. 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.
  4. Conduct a visual inspection of wiring around the fuel level sensor and surrounding harness for fraying or disconnection.
  5. If the problem persists, consider replacing the fuel pump.
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Comments 2

Jenny Madrigal

November 16, 2018

What just happened to me earlier was, I needed a jump so i brought my battery jumper out and placed it over and on the air filter or carburetor cover and radiator. It sits more sturdy there and it can reach the turminals. Well i placed. The red cable to the positive. and black to the neg. i set the charger on got in my 2006 frontier and turned the key. At the same time the engine was turning over the battery jumper slid moved a bit. Causing the positive cable to snap off leaving the negative intacked on the negative terinal while i jumped out of the cab to undue the thenjumper that is when i noticed what had happen. I quickly turned off the jumper and disengaged the negative cable. Then my truck started making a loud clicikng sound. I drove it around a bit. Then went home . Three hours later i went to start it up . again i needed a jump. I jumped it. Took off and notice my engine light on now. And now my fixd code is PO463.

Im suspecting. Im dealing with
coded: PO463
Frayed wiring/connection to fuel sensor. Because something had to happen when neg cable was left attached to the battery while the battery jumper was connected and in the ON position. Im thinking something backfired . im hoping no severe damage. Please somebody that has the knowledge please tell me what to look for and do. anybody .Im a Damsel in distress!

Larry W.Menefee

November 26, 2018

Mine caused by hitting deep water at high speed. Dried out after 36 hours.