AutoCodes – GMC – P003A GMC

P003A GMC Code - Turbocharger Boost Control Position Not Learned

Quick Answer

Each time the vehicle is operated, and the Ignition is turned off, the smart Variable Geometry Turbocharger (VGT) actuator performs a position learn function. 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: P003A GMC indicates Turbocharger Boost Control Position Not Learned.
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 11,281

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P003A GMC Description

Each time the vehicle is operated, and the Ignition is turned off, the smart Variable Geometry Turbocharger (VGT) actuator performs a position learn function. The actuator sweeps the arm and turbocharger vanes to the fully closed position and to the fully open position. The actuator measures the position in counts and can detect a position that exceeds the fully open or fully closed limit. The Diagnostic Trouble Code (DTC) will be set when the smart VGT actuator has detected an actuator arm position that exceeds the low or high threshold, at ignition Off.

OBDII Code P003A GMC - Turbocharger Boost Control Position Not Learned - AutoCodes.com — P003A GMC Code - Turbocharger Boost Control Position Not Learned

What does this mean?

What are the Possible Causes of the DTC P003A GMC?

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

How to Fix the DTC P003A 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P003A 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.

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Information for Specific GMC Models

P003A 2014 GMC Sierra — Turbocharger Boost Control Position Not Learned
P003A 2015 GMC Sierra — Turbocharger Boost Control Position Not Learned
P003A 2016 GMC Sierra — Turbocharger Boost Control Position Not Learned
P003A 2017 GMC Sierra — Turbocharger Boost Control Position Not Learned
P003A 2018 GMC Sierra — Turbocharger Boost Control Position Not Learned

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 P003A GMC Code

1. What are the common symptoms of OBDII code P003A (GMC) indicating Turbocharger Boost Control Position Not Learned?

The common symptoms include reduced engine power, hesitation or surging during acceleration, and the illumination of the Check Engine Light.

2. What could cause the OBDII code P003A (GMC) to trigger Turbocharger Boost Control Position Not Learned?

The code may be triggered by a faulty turbocharger actuator, loose or damaged wiring, issues with the turbocharger control module, or a software glitch in the engine control module.

3. How can I diagnose the cause of OBDII code P003A (GMC) related to Turbocharger Boost Control Position Not Learned?

Diagnosis involves checking the turbocharger actuator for proper operation, inspecting the wiring for any damage or loose connections, scanning the vehicle's computer for related fault codes, and performing a relearn procedure for the turbocharger control position.

4. What are some tips for repairing OBDII code P003A (GMC) Turbocharger Boost Control Position Not Learned?

Repair tips include ensuring proper connection of the turbocharger actuator, repairing any damaged wiring, updating the engine control module software if necessary, and performing a turbocharger control position relearn procedure.

5. Can I continue driving my vehicle with OBDII code P003A (GMC) indicating Turbocharger Boost Control Position Not Learned?

It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the turbocharger system and affect engine performance. It's advisable to address the issue promptly.

6. How urgent is it to fix OBDII code P003A (GMC) related to Turbocharger Boost Control Position Not Learned?

While the vehicle may still be operable with this code present, it is important to address it promptly to prevent potential damage to the turbocharger system and ensure optimal engine performance.

7. Can a DIY enthusiast repair OBDII code P003A (GMC) Turbocharger Boost Control Position Not Learned?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by checking and repairing wiring connections, but complex issues with the turbocharger system may require professional assistance.

8. Is resetting the Check Engine Light a sufficient fix for OBDII code P003A (GMC) Turbocharger Boost Control Position Not Learned?

Simply resetting the Check Engine Light without addressing the underlying issue will not resolve the problem. It's crucial to diagnose the cause of the code and perform necessary repairs to prevent it from reoccurring.

9. How long does it typically take to repair OBDII code P003A (GMC) Turbocharger Boost Control Position Not Learned?

The repair time can vary depending on the specific cause of the code. Simple fixes like reconnecting loose wiring may take a short time, while more complex issues might require more extensive diagnosis and repair, potentially taking longer.

10. Will fixing OBDII code P003A (GMC) Turbocharger Boost Control Position Not Learned improve my vehicle's performance?

Yes, addressing this code and resolving the underlying issue can improve engine performance, restore proper turbocharger function, and prevent related symptoms like loss of power or hesitation during acceleration.