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P2068 2018 GMC Sierra Code - Fuel Level Sensor 2 Circuit High Voltage

Quick Answer

The P2068 diagnostic trouble code for a 2018 GMC Sierra indicates a problem with the Fuel Level Sensor 2 Circuit High Voltage. Common causes include Faulty fuel level sensor, Corroded or damaged wiring connected to the sensor, Issues with the fuel pump. 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 2018 GMC Sierra indicates Fuel Level Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty fuel level sensor, Corroded or damaged wiring connected to the sensor, Issues with the fuel pump.
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 10, 2024
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Code P2068 2018 GMC Sierra Description

The P2068 diagnostic trouble code for a 2018 GMC Sierra indicates a problem with the Fuel Level Sensor 2 Circuit High Voltage. This code is specifically related to the fuel level sensor in the vehicle, which is responsible for monitoring the fuel level in the gas tank and sending this information to the vehicle's computer system. When the fuel level sensor detects a high voltage signal, it triggers the P2068 code. This high voltage reading can be caused by a variety of issues, including wiring problems, sensor malfunctions, or issues with the fuel system.

OBDII Code P2068 2018 GMC Sierra - Fuel Level Sensor 2 Circuit High Voltage
P2068 2018 GMC Sierra Code - Fuel Level Sensor 2 Circuit High Voltage

Common Causes of P2068 2018 GMC Sierra

  1. Faulty fuel level sensor
  2. Corroded or damaged wiring connected to the sensor
  3. Issues with the fuel pump
  4. Poor electrical connection to the sensor
  5. Fuel system contamination

Symptoms of P2068 2018 GMC Sierra

  1. Inaccurate fuel gauge readings
  2. Check Engine Light illuminated
  3. Fluctuating fuel gauge needle
  4. Engine stalling or hesitation
  5. Reduced fuel efficiency

How to Fix P2068 2018 GMC Sierra

  1. Diagnose the issue by using a scan tool to read the trouble code and check the fuel level sensor's voltage readings.
  2. Inspect the wiring and connections to the fuel level sensor for any signs of damage or corrosion. Repair or replace as needed.
  3. Test the fuel level sensor to ensure it is functioning correctly. Replace the sensor if it is faulty.
  4. Clear the trouble code from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify any underlying issues with the fuel system.

Cost to Fix P2068 2018 GMC Sierra

The cost of repairing a P2068 code for a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of replacing a fuel level sensor can range from $100 to $300, including parts and labor. Additional costs may be incurred if wiring repairs or other components need to be replaced. It's important to keep in mind that labor rates can vary between different auto repair shops, so it's advisable to obtain multiple quotes to ensure a fair price for the repair.

What does this mean?

Tech Notes for P2068 2018 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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2068 in a 2018 GMC Sierra related to the Fuel Level Sensor 2 Circuit High Voltage?

- Common symptoms include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge readings, and the check engine light being illuminated.

2. What are the possible causes of OBDII code P2068 in a 2018 GMC Sierra?

- The code P2068 can be triggered by issues such as a faulty fuel level sensor, damaged wiring or connectors in the fuel level sensor circuit, or a malfunctioning instrument cluster.

3. How can I diagnose the Fuel Level Sensor 2 Circuit High Voltage issue in my 2018 GMC Sierra?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code (P2068), conducting a visual inspection of the fuel level sensor and its wiring, and performing electrical tests to check for voltage irregularities.

4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P2068 related to the Fuel Level Sensor 2 Circuit High Voltage?

- It is generally not advisable to drive the vehicle with this issue as inaccurate fuel level readings can lead to running out of fuel unexpectedly. It is recommended to address the problem promptly.

5. Can I repair the Fuel Level Sensor 2 Circuit High Voltage problem in my 2018 GMC Sierra myself?

- Depending on your level of automotive expertise, you may be able to address the issue yourself by replacing the faulty fuel level sensor or repairing damaged wiring. However, professional diagnosis and repair are recommended for complex electrical issues.

6. How much does it typically cost to repair OBDII code P2068 in a 2018 GMC Sierra?

- The cost of repairing the Fuel Level Sensor 2 Circuit High Voltage issue can vary depending on the root cause of the problem, the extent of the repairs needed, and whether you choose to do the work yourself or take the vehicle to a professional mechanic.

7. Are there any preventive maintenance tips to avoid encountering OBDII code P2068 in a 2018 GMC Sierra?

- Regularly checking and maintaining the fuel system components, including the fuel level sensor, can help prevent issues that may trigger code P2068. Additionally, prompt repair of any dashboard warning lights can prevent further damage.

8. Can a faulty fuel level sensor cause other problems in a 2018 GMC Sierra besides triggering OBDII code P2068?

- Yes, a faulty fuel level sensor can cause issues such as inaccurate fuel level readings, incorrect fuel gauge readings, and potential fuel system malfunctions that may affect the vehicle's performance and efficiency.

9. Will resetting the OBDII system clear the P2068 code related to the Fuel Level Sensor 2 Circuit High Voltage in a 2018 GMC Sierra?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is recommended to diagnose and repair the root cause of the problem.

10. How urgent is it to address OBDII code P2068 in a 2018 GMC Sierra linked to the Fuel Level Sensor 2 Circuit High Voltage?

- While the vehicle may still be operable with this issue, it is important to address it promptly to avoid potential fuel-related problems and ensure accurate fuel level monitoring. Ignoring the problem could lead to inconvenience and potential damage.

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