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Engine-Codes – GMC – P0046 2014 GMC Sierra

P0046 2014 GMC Sierra Code - Turbocharger Boost Control Position Performance

Quick Answer

The P0046 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a potential issue with the turbocharger boost control position performance. Common causes include Faulty wastegate control solenoid, Wastegate control position sensor malfunction, Vacuum leaks in the wastegate control system. 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 2014 GMC Sierra indicates Turbocharger Boost Control Position Performance.
Common causes
Common causes include Faulty wastegate control solenoid, Wastegate control position sensor malfunction, Vacuum leaks in the wastegate control system.
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 11, 2024
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Code P0046 2014 GMC Sierra Description

The P0046 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a potential issue with the turbocharger boost control position performance. This code specifically relates to the turbocharger wastegate control system, which is responsible for regulating the amount of boost pressure produced by the turbocharger. The wastegate control position sensor monitors the position of the wastegate, which controls the flow of exhaust gases to the turbocharger, ultimately affecting the boost pressure.

OBDII Code P0046 2014 GMC Sierra - Turbocharger Boost Control Position Performance
P0046 2014 GMC Sierra Code - Turbocharger Boost Control Position Performance

Common Causes of P0046 2014 GMC Sierra

  1. Faulty wastegate control solenoid
  2. Wastegate control position sensor malfunction
  3. Vacuum leaks in the wastegate control system
  4. Wiring or electrical issues
  5. Software or calibration issues with the ECM

Symptoms of P0046 2014 GMC Sierra

  1. Reduced engine power
  2. Decreased fuel efficiency
  3. Illuminated Check Engine Light
  4. Engine misfires
  5. Excessive smoke from the exhaust

How to Fix P0046 2014 GMC Sierra

  1. Diagnose the root cause of the issue by using a scan tool to retrieve and interpret the DTC.
  2. Inspect the wastegate control solenoid, sensor, and related components for any signs of damage or wear.
  3. Check for vacuum leaks in the wastegate control system and repair as necessary.
  4. Test the wiring and connectors for proper continuity and repair any faults found.
  5. Reset the ECM and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0046 2014 GMC Sierra

The typical repair costs for addressing a P0046 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. On average, parts for this repair can range from $100 to $300, with labor costs adding an additional $100 to $200. However, as labor rates can vary significantly between different locations and types of repair facilities, it is recommended to obtain quotes from local auto repair shops for a more accurate estimate.

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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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P0046 in a 2014 GMC Sierra related to Turbocharger Boost Control Position Performance?

The common symptoms include reduced engine power, decreased fuel efficiency, and potentially rough idling or hesitation during acceleration.

2. What are the possible causes of OBDII code P0046 in a 2014 GMC Sierra?

Possible causes of code P0046 could include a faulty turbocharger wastegate control solenoid, damaged wiring or connectors in the turbocharger system, or issues with the turbocharger itself.

3. How serious is OBDII code P0046 in a 2014 GMC Sierra?

Code P0046 should be addressed promptly to prevent further damage to the turbocharger system and ensure optimal engine performance. Ignoring this code could lead to more severe issues over time.

4. Can I continue driving my 2014 GMC Sierra with OBDII code P0046?

It is not recommended to continue driving the vehicle with code P0046, as it can result in reduced engine power and potential long-term damage to the turbocharger system. It is advisable to address the issue as soon as possible.

5. How can I diagnose and repair OBDII code P0046 in my 2014 GMC Sierra?

Diagnosing code P0046 may involve checking the turbocharger system for any visible damage, testing the wastegate control solenoid, and inspecting the wiring and connectors for any faults. Repair typically involves replacing the faulty components or addressing any wiring issues.

6. Is it possible to reset OBDII code P0046 in a 2014 GMC Sierra without fixing the underlying issue?

While clearing the code may temporarily turn off the Check Engine Light, the underlying issue causing code P0046 will still exist. It is crucial to diagnose and repair the problem to prevent the code from reoccurring.

7. Can a DIY enthusiast address OBDII code P0046 in a 2014 GMC Sierra?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair code P0046. However, due to the complexity of turbocharger systems, it is recommended to seek professional help if needed.

8. Will fixing OBDII code P0046 improve the performance and fuel efficiency of my 2014 GMC Sierra?

Yes, addressing code P0046 and resolving the turbocharger boost control position performance issue can help restore optimal engine performance, improve fuel efficiency, and prevent potential further damage to the turbocharger system.

9. How much does it typically cost to repair OBDII code P0046 in a 2014 GMC Sierra?

The cost of repairing code P0046 can vary depending on the exact cause of the issue, labor rates, and parts needed. It is advisable to consult with a mechanic or dealership for an accurate estimate based on your specific situation.

10. How often does OBDII code P0046 occur in a 2014 GMC Sierra?

While the frequency of code P0046 may vary, it is not an uncommon issue in vehicles equipped with turbocharged engines like the 2014 GMC Sierra. Regular maintenance and prompt attention to any warning lights can help prevent such issues.

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