AutoCodes – GMC – P0046 2014 GMC Sierra

P0046 2014 GMC Sierra Code - Turbocharger Boost Control Position Performance

Quick Answer

A smart turbocharger vane position actuator incorporates a brushless motor and is mounted on top of the turbocharger. Common causes include Faulty Turbocharger Vane Position Actuator, Turbocharger Vane Position Actuator harness is open or shorted, Turbocharger Vane Position Actuator 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: P0046 2014 GMC Sierra indicates Turbocharger Boost Control Position Performance.
Common causes: Common causes include Faulty Turbocharger Vane Position Actuator, Turbocharger Vane Position Actuator harness is open or shorted, Turbocharger Vane Position Actuator 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.

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Code Popularity 227

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 13, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0046 2014 GMC Sierra Description

A smart turbocharger vane position actuator incorporates a brushless motor and is mounted on top of the turbocharger. It is connected to the vanes by a linkage rod. The vanes are used to vary the amount of boost pressure and can control the boost pressure independent of engine speed. The vanes mount to a unison ring which is rotated to change the vane angle. The Engine Control Module (ECM) communicates with the actuator via the Controller Area Network (CAN) bus. The ECM will vary the vane angle which adjusts the boost dependent on the load requirements of the engine. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the difference between the commanded turbocharger vane position and the actual turbocharger vane position is greater than 15%, for greater than 10 s.

OBDII Code P0046 2014 GMC Sierra - Turbocharger Boost Control Position Performance - AutoCodes.com — P0046 2014 GMC Sierra Code - Turbocharger Boost Control Position Performance

What does this mean?

What are the Possible Causes of the DTC P0046 2014 GMC Sierra?

Faulty Turbocharger Vane Position Actuator
Turbocharger Vane Position Actuator harness is open or shorted
Turbocharger Vane Position Actuator circuit poor electrical connection
Faulty Turbocharger Assembly

How to Fix the DTC P0046 2014 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0046 2014 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.

Need more information about the P0046 2014 GMC Sierra code?

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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.