P0464 2017 GMC Sierra Code - Fuel Level Sensor Circuit Intermittent
Quick Answer
Diesel Engine 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
- P0464 2017 GMC Sierra indicates Fuel Level Sensor Circuit Intermittent.
- 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.
Code P0464 2017 GMC Sierra Description
The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The Fuel Pump Driver Control Module monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor and sends the signal information to the Engine Control Module (ECM) for all further handling. The ECM uses this value 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.
Gasoline Engine
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 fuel level change is greater than 10% for a duration lasting less than 30 seconds.
What are the Possible Causes of the DTC P0464 2017 GMC Sierra?
- 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 P0464 2017 GMC Sierra?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0464 2017 GMC Sierra 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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Frequently Asked Questions about P0464 2017 GMC Sierra Code
1. What does the OBDII code P0464 mean on a 2017 GMC Sierra?
The P0464 code indicates an intermittent issue with the fuel level sensor circuit, meaning the fuel level readings from the sensor are not consistent or reliable.
2. What are the common symptoms of code P0464 on a 2017 GMC Sierra?
Symptoms may include erratic or inaccurate fuel gauge readings, the check engine light turning on, and potential difficulty determining the actual fuel level.
3. What causes the P0464 code to appear on a 2017 GMC Sierra?
Common causes include a faulty fuel level sensor, damaged or corroded wiring or connectors, a malfunctioning instrument cluster, or an issue with the engine control module (ECM).
4. Can a faulty fuel pump cause the P0464 code on a 2017 GMC Sierra?
While the fuel pump itself is unlikely to cause this code, the fuel level sensor, which is often integrated with the fuel pump assembly, could be the culprit.
5. How is the P0464 code diagnosed on a 2017 GMC Sierra?
A technician will use a scan tool to review the code, inspect the wiring and connectors for damage or corrosion, test the fuel level sensor for proper operation, and check for other related codes.
6. How do you fix the P0464 code on a 2017 GMC Sierra?
Repairs may include replacing the fuel level sensor, repairing damaged wiring or connectors, or reprogramming/updating the ECM if necessary.
7. Can I drive my 2017 GMC Sierra with the P0464 code?
While the vehicle may still be drivable, it’s risky because the fuel gauge may not display the correct fuel level, potentially leading to running out of fuel unexpectedly.
8. How much does it cost to fix the P0464 code on a 2017 GMC Sierra?
Repair costs vary depending on the issue but typically range from $150 to $600, with higher costs if the fuel level sensor or fuel pump assembly needs replacement.
9. Can a loose gas cap cause the P0464 code on a 2017 GMC Sierra?
No, a loose gas cap is unrelated to the fuel level sensor circuit and is unlikely to trigger this specific code.
10. Is the P0464 code a common issue for the 2017 GMC Sierra?
It’s not extremely common but can occur due to normal wear and tear on the fuel level sensor or wiring issues, especially in older or high-mileage vehicles.
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