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Engine-Codes – GMC – P0046 2016 GMC Sierra

P0046 2016 GMC Sierra Code - Turbocharger Boost Control Position Performance

Quick Answer

The P0046 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the turbocharger boost control position performance. Common causes include Faulty boost control position sensor: The sensor may be malfunctioning or sending incorrect signals to the ECM, Wiring issues: Damaged or corroded wiring connections can disrupt the communication between the sensor and ECM, Vacuum leaks: Leaks in the vacuum lines that control the turbocharger can affect its performance. 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
P0046 2016 GMC Sierra indicates Turbocharger Boost Control Position Performance.
Common causes
Common causes include Faulty boost control position sensor: The sensor may be malfunctioning or sending incorrect signals to the ECM, Wiring issues: Damaged or corroded wiring connections can disrupt the communication between the sensor and ECM, Vacuum leaks: Leaks in the vacuum lines that control the turbocharger can affect its performance.
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 09, 2024
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Code P0046 2016 GMC Sierra Description

The P0046 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the turbocharger boost control position performance. In turbocharged vehicles, the turbocharger plays a crucial role in boosting engine power by compressing the intake air before it enters the engine cylinders. The boost control position sensor is responsible for monitoring and controlling the turbocharger's operation to ensure optimal performance.

OBDII Code P0046 2016 GMC Sierra - Turbocharger Boost Control Position Performance
P0046 2016 GMC Sierra Code - Turbocharger Boost Control Position Performance

Common Causes of P0046 2016 GMC Sierra

  1. Faulty boost control position sensor: The sensor may be malfunctioning or sending incorrect signals to the ECM.
  2. Wiring issues: Damaged or corroded wiring connections can disrupt the communication between the sensor and ECM.
  3. Vacuum leaks: Leaks in the vacuum lines that control the turbocharger can affect its performance.
  4. Turbocharger issues: A failing turbocharger or wastegate can also trigger the P0046 code.

Symptoms of P0046 2016 GMC Sierra

  1. Decreased engine power: The vehicle may feel sluggish and unresponsive, especially during acceleration.
  2. Reduced fuel efficiency: The engine may consume more fuel than usual due to inefficient turbocharger operation.
  3. Engine misfires: The engine may misfire or run rough, causing vibrations and a noticeable decrease in performance.
  4. Illuminated Check Engine Light: The P0046 DTC will trigger the Check Engine Light on the dashboard, indicating a problem with the turbocharger boost control position.

How to Fix P0046 2016 GMC Sierra

  1. Diagnose the issue: Use a scan tool to retrieve the DTC and perform a visual inspection of the turbocharger system.
  2. Check wiring and connections: Inspect the wiring harness and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the boost control position sensor: Use a multimeter to check the sensor's resistance and voltage output, replacing if faulty.
  4. Inspect vacuum lines: Check for leaks or blockages in the vacuum lines connected to the turbocharger system, repairing or replacing as necessary.
  5. Clear the DTC: Once the repair is completed, clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0046 2016 GMC Sierra

The cost of repairing a P0046 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, the parts for this repair, such as a new boost control position sensor or wiring harness, can range from $50 to $200. Labor costs at an auto repair shop typically fall between $80 and $150 per hour. Overall, the total repair cost for this issue may range from $150 to $500, including parts and labor. It's recommended to consult with a certified mechanic or dealership for a more accurate cost estimate based on your vehicle's specific needs.

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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 P0046 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0046 in a 2016 GMC Sierra?

- Common symptoms include reduced engine power, poor acceleration, a noticeable decrease in fuel efficiency, and the vehicle going into "limp mode."

2. What are the potential causes of OBDII code P0046 in a 2016 GMC Sierra?

- The code P0046 is typically triggered by issues with the turbocharger boost control position sensor, such as a faulty sensor, damaged wiring, or a poor connection.

3. How can I diagnose the cause of OBDII code P0046 in my 2016 GMC Sierra?

- Diagnosing the issue involves checking the turbocharger boost control position sensor for proper operation, inspecting the sensor wiring for damage, and ensuring there are no loose connections.

4. Can I continue driving my 2016 GMC Sierra with OBDII code P0046?

- It is not recommended to drive the vehicle with code P0046 present, as it can lead to further damage to the turbocharger system and other components. It's best to address the issue promptly.

5. How can I repair OBDII code P0046 in my 2016 GMC Sierra?

- Repairing code P0046 may involve replacing the turbocharger boost control position sensor, repairing damaged wiring, or addressing any loose connections to resolve the issue.

6. Will resetting the OBDII code P0046 in my 2016 GMC Sierra make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing code P0046 is not addressed, the code is likely to return.

7. Can a DIY enthusiast fix OBDII code P0046 in a 2016 GMC Sierra?

- Depending on your skill level and access to tools, DIY enthusiasts may be able to diagnose and repair code P0046 by replacing the turbocharger boost control position sensor or addressing wiring issues.

8. How long does it typically take to repair OBDII code P0046 in a 2016 GMC Sierra?

- The repair time for code P0046 can vary depending on the exact cause of the issue. It may take anywhere from 1 to 3 hours to diagnose and repair the problem.

9. Can extreme weather conditions affect OBDII code P0046 in a 2016 GMC Sierra?

- Extreme weather conditions can potentially exacerbate existing issues related to code P0046, especially if there are wiring problems or sensor malfunctions that are sensitive to temperature changes.

10. Is it necessary to have a professional mechanic clear OBDII code P0046 in a 2016 GMC Sierra?

- While professional help is recommended for accurate diagnosis and repair, you can clear the code yourself using an OBDII scanner. However, the underlying issue should still be addressed to prevent the code from reoccurring.

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