AutoCodes – GMC – P0046 GMC

P0046 GMC 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 GMC 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 595

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

What does this mean?

What are the Possible Causes of the DTC P0046 GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P0046 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P0046 2014 GMC Sierra — Turbocharger Boost Control Position Performance
P0046 2015 GMC Sierra — Turbocharger Boost Control Position Performance
P0046 2016 GMC Sierra — Turbocharger Boost Control Position Performance
P0046 2017 GMC Sierra — Turbocharger Boost Control Position Performance
P0046 2018 GMC Sierra — Turbocharger Boost Control Position Performance

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 GMC Code

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

The common symptoms of OBDII code P0046 in a GMC vehicle include reduced engine power, decreased fuel efficiency, and potential engine stalling.

2. What typically causes the OBDII code P0046 in a GMC related to Turbocharger Boost Control Position Performance?

The OBDII code P0046 in a GMC related to Turbocharger Boost Control Position Performance is often caused by a faulty turbocharger wastegate control solenoid or a malfunctioning turbocharger actuator.

3. How can I diagnose the OBDII code P0046 in my GMC vehicle?

To diagnose the OBDII code P0046 in your GMC vehicle, you can start by checking the turbocharger wastegate control solenoid for proper operation, inspecting the turbocharger actuator for any issues, and scanning the vehicle's computer for related trouble codes.

4. Is it safe to continue driving with an active OBDII code P0046 in my GMC?

It is not recommended to continue driving with an active OBDII code P0046 in your GMC, as it can lead to further damage to the turbocharger system and potential engine issues. It is best to address the problem promptly.

5. What are some repair tips for fixing the OBDII code P0046 in a GMC?

Some repair tips for fixing the OBDII code P0046 in a GMC include checking and replacing the turbocharger wastegate control solenoid, inspecting the turbocharger actuator for proper function, and clearing the trouble code after making necessary repairs.

6. Can a DIY enthusiast fix the OBDII code P0046 in a GMC?

While some DIY enthusiasts with automotive repair experience may be able to address the OBDII code P0046 in a GMC, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

7. How much does it cost to repair the OBDII code P0046 in a GMC at a mechanic or dealership?

The cost to repair the OBDII code P0046 in a GMC at a mechanic or dealership can vary depending on the exact cause of the issue, parts needed for replacement, and labor rates. It is advisable to obtain quotes from different service providers.

8. Can a dirty or clogged air filter trigger the OBDII code P0046 in a GMC?

A dirty or clogged air filter is not a direct cause of the OBDII code P0046 in a GMC related to Turbocharger Boost Control Position Performance. However, a restricted air filter can impact overall engine performance and efficiency.

9. Will resetting the vehicle's computer clear the OBDII code P0046 in a GMC?

Resetting the vehicle's computer may temporarily clear the OBDII code P0046 in a GMC, but if the underlying issue causing the code is not addressed and fixed, the code is likely to reappear after some driving cycles.

10. Is the OBDII code P0046 in a GMC a serious issue that requires immediate attention?

The OBDII code P0046 in a GMC related to Turbocharger Boost Control Position Performance should be addressed promptly to prevent potential damage to the turbocharger system and engine. It is considered a serious issue that requires attention.