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P2068 2015 GMC Sierra Code - Fuel Level Sensor 2 Circuit High Voltage

Quick Answer

The P2068 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Fuel Level Sensor 2 Circuit registering high voltage. Common causes include Faulty fuel level sensor, Wiring or connector issues, Corrosion or damage to sensor components. 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
P2068 2015 GMC Sierra indicates Fuel Level Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty fuel level sensor, Wiring or connector issues, Corrosion or damage to sensor components.
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 Sep 17, 2024
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Code P2068 2015 GMC Sierra Description

The P2068 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Fuel Level Sensor 2 Circuit registering high voltage. The fuel level sensor is a crucial component of the vehicle's fuel system, responsible for accurately measuring the amount of fuel in the tank and sending this information to the engine control module (ECM). When the sensor detects a high voltage signal, it means that the fuel level in the tank is being inaccurately reported. This can lead to issues with fuel consumption calculations, inaccurate fuel level readings on the dashboard, and potential engine performance problems.

OBDII Code P2068 2015 GMC Sierra - Fuel Level Sensor 2 Circuit High Voltage
P2068 2015 GMC Sierra Code - Fuel Level Sensor 2 Circuit High Voltage

Common Causes of P2068 2015 GMC Sierra

  1. Faulty fuel level sensor
  2. Wiring or connector issues
  3. Corrosion or damage to sensor components
  4. ECM malfunction
  5. Electrical system problems

Symptoms of P2068 2015 GMC Sierra

  1. Inaccurate fuel level readings on the dashboard
  2. Check Engine Light illuminated
  3. Engine stalling or hesitation
  4. Poor fuel economy
  5. Difficulty starting the vehicle

How to Fix P2068 2015 GMC Sierra

  1. Begin by diagnosing the issue using a scan tool to confirm the P2068 code and pinpoint the exact cause of the high voltage reading.
  2. Inspect the wiring and connectors associated with the fuel level sensor 2 for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the fuel level sensor 2 for proper functionality. If faulty, replace the sensor with a new one.
  4. Clear the DTC from the ECM memory and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying ECM or electrical system issues.

Cost to Fix P2068 2015 GMC Sierra

The typical repair costs for addressing a P2068 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty fuel level sensor or repairing wiring/connectors may cost between $200 and $500, including parts and labor. However, additional diagnostic time and labor rates at auto repair shops can influence the final cost. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on your location and vehicle specifications.

What does this mean?

Tech Notes for P2068 2015 GMC Sierra

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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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 P2068 2015 GMC Sierra Code

1. What are common symptoms of OBDII code P2068 on a 2015 GMC Sierra related to the Fuel Level Sensor 2 Circuit High Voltage?

The common symptoms include inaccurate fuel level readings on the gauge, fluctuating fuel readings, or the fuel gauge not working at all.

2. What are possible causes of the Fuel Level Sensor 2 Circuit High Voltage code (P2068) on a 2015 GMC Sierra?

Common causes include a faulty fuel level sensor, issues with the fuel level sensor wiring, a corroded connector, or a problem with the vehicle's PCM (powertrain control module).

3. How can I diagnose the Fuel Level Sensor 2 Circuit High Voltage issue (P2068) on my 2015 GMC Sierra?

You can diagnose this issue by checking the wiring and connectors for any damage, testing the fuel level sensor's resistance, and using a scan tool to monitor the fuel level sensor data.

4. Is it safe to drive my 2015 GMC Sierra with the OBDII code P2068 related to the Fuel Level Sensor 2 Circuit High Voltage?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid running out of fuel unexpectedly.

5. Can I reset the OBDII code P2068 on my 2015 GMC Sierra related to the Fuel Level Sensor 2 Circuit High Voltage without fixing the underlying issue?

Resetting the code without fixing the problem will only temporarily clear the error code, but the issue will likely reoccur until the root cause is addressed.

6. How much does it typically cost to repair the Fuel Level Sensor 2 Circuit High Voltage issue (P2068) on a 2015 GMC Sierra?

The cost of repair can vary depending on the cause of the issue, but it may range from $200 to $500, including parts and labor.

7. Can a DIY enthusiast fix the Fuel Level Sensor 2 Circuit High Voltage problem (P2068) on a 2015 GMC Sierra?

Depending on the DIYer's skills and access to tools, it is possible to fix this issue at home by replacing the fuel level sensor or repairing any damaged wiring.

8. Will the check engine light turn off automatically after repairing the Fuel Level Sensor 2 Circuit High Voltage issue (P2068) on a 2015 GMC Sierra?

In most cases, the check engine light will turn off automatically after the repair once the vehicle's computer system detects that the issue has been resolved.

9. How important is it to address the OBDII code P2068 related to the Fuel Level Sensor 2 Circuit High Voltage on my 2015 GMC Sierra?

It is crucial to address this issue promptly as inaccurate fuel level readings can lead to running out of fuel unexpectedly, causing inconvenience and potentially damaging the vehicle's fuel system.

10. Can a malfunctioning Fuel Level Sensor 2 Circuit High Voltage (P2068) on a 2015 GMC Sierra affect the vehicle's performance?

While the issue is primarily related to the fuel level sensor, it can indirectly affect the vehicle's performance if the inaccurate fuel readings lead to running out of fuel while driving.

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