AutoCodes – Generic – P0463

P0463 Code - Fuel Level Sensor Circuit High Voltage

Quick Answer

The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. Common causes include Faulty Fuel Level Sensor, Fuel Level Sensor harness is open or shorted, Fuel Level Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0463 indicates Fuel Level Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Fuel Level Sensor, Fuel Level Sensor harness is open or shorted, Fuel Level Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 101,507

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 29, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
Comments
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Code P0463 Description

The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The Engine Control Module (ECM) monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to determine the fuel level. When the fuel tank is full, the resistances of both fuel level sensors are low, and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high, and the ECM senses a high signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via the serial data circuit to the instrument cluster in order to control the fuel gauge.
The Diagnostic Trouble Code (DTC) will be set if the ECM detects the signal voltage is greater than 4.7 V.

OBDII Code P0463 - Fuel Level Sensor Circuit High Voltage - AutoCodes.com — P0463 Code - Fuel Level Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0463?

Faulty Fuel Level Sensor
Fuel Level Sensor harness is open or shorted
Fuel Level Sensor circuit poor electrical connection
Faulty Instrument Cluster
Faulty Engine Control Module (ECM)

How to Fix the DTC P0463?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

A low fuel level can trigger this code. Before replacing any parts, try filling up the fuel tank and erasing the engine code. If the problem persists, it may be necessary to replace the fuel level sensor.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0463 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Makes

P0463 Acura — Fuel Level Sensor Circuit High Voltage
P0463 BMW — Fuel Level Sensor 'A' Circuit High
P0463 Buick — Fuel Level Sensor Circuit High Voltage
P0463 Cadillac — Fuel Level Sensor Circuit High Voltage
P0463 Chevrolet — Fuel Level Sensor Circuit High Voltage
P0463 Chrysler — Fuel Level Sensor 1 Circuit High
P0463 Dodge — Fuel Level Sensor 1 Circuit High
P0463 Ford — Fuel Level Sensor 'A' Circuit High
P0463 GMC — Fuel Level Sensor Circuit High Voltage
P0463 Honda — Fuel Level Sensor Circuit High Voltage
P0463 Hyundai — Fuel Level Sensor 'A' Circuit High Input
P0463 Infiniti — Fuel Level Sensor Circuit High Input
P0463 Isuzu — Fuel Level Sensor Circuit High Voltage
P0463 Jeep — Fuel Level Sensor 1 Circuit High
P0463 KIA — Fuel Level Sensor 'A' Circuit High Input
P0463 Lincoln — Fuel Level Sensor 'A' Circuit High
P0463 Mazda — Fuel Gauge Sender Unit Circuit High Input
P0463 Mercedes-Benz — Fuel Level Sensor Circuit High Input
P0463 Mercury — Fuel Level Sensor 'A' Circuit High
P0463 MINI — Fuel Level Sensor 'A' Circuit High
P0463 Mitsubishi — Fuel Level Sensor Circuit High Input
P0463 Nissan — Fuel Level Sensor Circuit High Input
P0463 Oldsmobile — Fuel Level Sensor Circuit High Voltage
P0463 Pontiac — Fuel Level Sensor Circuit High Voltage
P0463 Saturn — Fuel Level Sensor Circuit High Voltage
P0463 Subaru — Fuel Level Sensor Circuit High Input
P0463 Suzuki — Fuel Level High Voltage

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.