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Engine-Codes – GMC – P0464 GMC

P0464 GMC Code - Fuel Level Sensor Circuit Intermittent

Quick Answer

The P0464 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the fuel level sensor circuit intermittently. Common causes include Faulty fuel level sensor, Corrosion or damage to the wiring or connectors in the fuel level sensor circuit, Poor electrical connection between the fuel level sensor and the PCM. 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
P0464 GMC indicates Fuel Level Sensor Circuit Intermittent.
Common causes
Common causes include Faulty fuel level sensor, Corrosion or damage to the wiring or connectors in the fuel level sensor circuit, Poor electrical connection between the fuel level sensor and the PCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0464 GMC Description

The P0464 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the fuel level sensor circuit intermittently. This code is triggered when the powertrain control module (PCM) detects a discrepancy in the fuel level sensor's signal, which could lead to inaccurate readings of the fuel level in the vehicle's tank. The fuel level sensor is responsible for sending information to the PCM, which in turn displays the fuel level on the dashboard gauge. When this circuit is intermittent, it can cause issues with fuel level readings, leading to incorrect fuel level indications on the dashboard.

OBDII Code P0464 GMC - Fuel Level Sensor Circuit Intermittent
P0464 GMC Code - Fuel Level Sensor Circuit Intermittent

Common Causes of P0464 GMC

  1. Faulty fuel level sensor
  2. Corrosion or damage to the wiring or connectors in the fuel level sensor circuit
  3. Poor electrical connection between the fuel level sensor and the PCM
  4. Issues with the PCM itself
  5. Fuel pump module failure

Symptoms of P0464 GMC

  1. Inaccurate fuel level readings on the dashboard gauge
  2. Fluctuating fuel level display while driving
  3. Check Engine Light illuminated on the dashboard
  4. Engine stalling or hesitation during acceleration
  5. Difficulty starting the vehicle

How to Fix P0464 GMC

  1. Diagnose the issue by using a scan tool to retrieve the DTC and inspect the fuel level sensor circuit.
  2. Check the wiring and connectors for any signs of damage, corrosion, or loose connections.
  3. Test the fuel level sensor's resistance and functionality to determine if it needs replacement.
  4. Replace the fuel level sensor if it is faulty, ensuring proper installation and connection.
  5. Clear the DTC and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0464 GMC

The cost estimate for repairing a P0464 GMC code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. Generally, replacing a faulty fuel level sensor can range from $150 to $300, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It is recommended to consult with a professional mechanic for a more accurate cost estimate based on the vehicle's make and model.

What does this mean?

Tech Notes for P0464 GMC

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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Information for Specific GMC Models

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.

Frequently Asked Questions about P0464 GMC Code

1. What does the OBDII code P0464 mean on a GMC vehicle?

P0464 indicates an intermittent issue with the fuel level sensor circuit, which means the sensor is not consistently providing accurate readings to the vehicle's computer.

2. What are the common symptoms of code P0464 in a GMC?

Symptoms include an erratic or inaccurate fuel gauge, the check engine light turning on, and potentially poor fuel economy due to incorrect fuel level readings.

3. What causes the P0464 code to appear in a GMC?

Common causes include a faulty fuel level sensor, loose or damaged wiring, corroded electrical connections, or a malfunctioning instrument cluster.

4. Can a bad fuel pump cause the P0464 code in my GMC?

While the fuel pump itself typically doesn’t trigger P0464, the fuel level sensor, which is often part of the fuel pump assembly, may fail and cause the code.

5. How is the P0464 code diagnosed on a GMC?

A mechanic will use a scan tool to retrieve the code, inspect the wiring and connectors for damage, and test the fuel level sensor for proper operation.

6. Can I drive my GMC with a P0464 code?

While the vehicle may still run, driving with this code can lead to inaccurate fuel level readings, increasing the risk of running out of fuel unexpectedly.

7. How do you fix the P0464 code on a GMC vehicle?

Repairs may involve replacing the fuel level sensor, fixing damaged wiring or connectors, or reprogramming the vehicle’s computer if necessary.

8. How much does it cost to fix the P0464 code on a GMC?

The repair cost can vary but typically ranges from $150 to $400, depending on whether the fuel level sensor or other components need replacement.

9. Can a software update fix the P0464 code on a GMC?

In some cases, a software update to the vehicle’s computer may resolve the issue if it’s caused by a programming error.

10. How can I prevent the P0464 code from recurring on my GMC?

Regularly inspect the fuel system wiring and connectors for damage, and ensure the fuel tank and sensor are not exposed to excessive moisture or contaminants.

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