AutoCodes – GMC – P0462 GMC

P0462 GMC Code - Fuel Level Sensor Circuit Low Input

Quick Answer

The fuel level sensor consists of a float, a wire float arm, and a ceramic resistor cord. 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: P0462 GMC indicates Fuel Level Sensor Circuit Low Input.
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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 12,052

How popular is this code, among other codes? Low

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 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0462 GMC Description

The fuel level sensor consists of a float, a wire float arm, and a ceramic resistor cord. The position of the float arm indicates the fuel level. The fuel level sensor contains a variable resistor, which changes resistance in correspondence to the amount of fuel in the fuel tank. The Engine Control Module (ECM) sends the fuel level information via the class 2 circuit to the instrument panel (I/P) cluster. This information is used for the I/P fuel gage and the low fuel warning indicator, if applicable. The ECM also monitors the fuel level input for various diagnostics.

OBDII Code P0462 GMC - Fuel Level Sensor Circuit Low Input - AutoCodes.com — P0462 GMC Code - Fuel Level Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0462 GMC?

Faulty fuel level sensor
Fuel level sensor harness is open or shorted
Fuel level sensor circuit poor electrical connection

How to Fix the DTC P0462 GMC?

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

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 replaced the fuel level sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0462 GMC 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.

Need more information about the P0462 GMC code?

Need more information on how to fix the P0462 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0462 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0462 2014 GMC Sierra — Fuel Level Sensor Circuit Low Voltage
P0462 2015 GMC Sierra — Fuel Level Sensor Circuit Low Voltage
P0462 2016 GMC Sierra — Fuel Level Sensor Circuit Low Voltage
P0462 2017 GMC Sierra — Fuel Level Sensor Circuit Low Voltage
P0462 2018 GMC Sierra — Fuel Level Sensor Circuit Low 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.