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Engine-Codes – GMC – C038D 2016 GMC Sierra

C038D 2016 GMC Sierra Code - Range Actuator Position Not Learned

Quick Answer

The diagnostic trouble code C038D for a 2016 GMC Sierra indicates that the Range Actuator Position has not been learned by the vehicle's computer system. Common causes include Faulty range actuator, Damaged wiring or connectors, Malfunctioning TCM. 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
C038D 2016 GMC Sierra indicates Range Actuator Position Not Learned.
Common causes
Common causes include Faulty range actuator, Damaged wiring or connectors, Malfunctioning TCM.
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 C038D 2016 GMC Sierra Description

The diagnostic trouble code C038D for a 2016 GMC Sierra indicates that the Range Actuator Position has not been learned by the vehicle's computer system. The Range Actuator is responsible for controlling the position of the transmission range selector, ensuring that the correct gear is engaged based on the driver's input. When this code appears, it means that the vehicle's computer has not been able to properly calibrate or learn the position of the range actuator, which can lead to issues with shifting gears and overall transmission performance.

OBDII Code C038D 2016 GMC Sierra - Range Actuator Position Not Learned
C038D 2016 GMC Sierra Code - Range Actuator Position Not Learned

Common Causes of C038D 2016 GMC Sierra

  1. Faulty range actuator
  2. Damaged wiring or connectors
  3. Malfunctioning TCM
  4. Software calibration issues
  5. Electrical system faults

Symptoms of C038D 2016 GMC Sierra

  1. Erratic shifting behavior
  2. Delayed or harsh gear shifts
  3. Transmission slipping
  4. Limp mode activation
  5. Illuminated Check Engine Light

How to Fix C038D 2016 GMC Sierra

  1. Perform a thorough diagnostic scan to retrieve the trouble code and identify the specific issue with the range actuator position.
  2. Inspect the range actuator, wiring, and connectors for any visible damage or wear.
  3. Test the TCM to ensure it is functioning correctly and communicate with the range actuator.
  4. Calibrate the TCM and range actuator position using manufacturer-specific instructions and diagnostic tools.
  5. Clear the trouble code from the vehicle's computer system and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix C038D 2016 GMC Sierra

The typical repair costs for addressing the Range Actuator Position Not Learned code can range from $200 to $500, depending on the extent of the issue and the specific components that need to be repaired or replaced. This estimate includes parts and labor, but actual costs may vary based on the location of the repair shop, the make and model of the vehicle, and the complexity of the repair process. It is recommended to consult with a professional mechanic to get an accurate cost estimate for this repair.

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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 C038D 2016 GMC Sierra Code

1. What does the OBDII code C038D mean on a 2016 GMC Sierra?

The code C038D indicates a "Range Actuator Position Not Learned" issue in the transmission system of the vehicle.

2. What are the common symptoms of the Range Actuator Position Not Learned code?

Common symptoms include erratic shifting, transmission slippage, hesitation when accelerating, and the vehicle going into limp mode.

3. What are the possible causes of the C038D code on a 2016 GMC Sierra?

Possible causes include a faulty range actuator, damaged wiring or connectors, low transmission fluid levels, or a malfunctioning transmission control module.

4. How can I diagnose the Range Actuator Position Not Learned issue on my GMC Sierra?

Diagnosis usually involves using a professional OBDII scanner to retrieve the specific trouble code, checking the transmission fluid level and condition, and inspecting the range actuator and related components for any visible damage.

5. Can I continue driving my GMC Sierra with the C038D code present?

It is not recommended to continue driving the vehicle with the C038D code present, as it can lead to further damage to the transmission system and potentially unsafe driving conditions.

6. How can the Range Actuator Position Not Learned code be repaired on a 2016 GMC Sierra?

Repairing the C038D code typically involves relearning the range actuator position through a proper relearn procedure using a diagnostic scan tool, replacing any faulty components, and ensuring proper transmission fluid levels.

7. Can I reset the C038D code on my GMC Sierra by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is recommended to address the underlying issue causing the code to prevent it from reoccurring.

8. Is it necessary to visit a dealership for repairs related to the C038D code?

While some repairs related to the C038D code may require specialized tools or expertise, independent mechanics or automotive shops with experience in transmission systems can also effectively diagnose and repair the issue.

9. How much does it typically cost to repair the Range Actuator Position Not Learned code on a 2016 GMC Sierra?

The cost of repairing the C038D code can vary depending on the root cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. How can I prevent the C038D code from appearing on my GMC Sierra in the future?

Regular maintenance of the transmission system, such as checking and changing transmission fluid at recommended intervals, can help prevent issues like the Range Actuator Position Not Learned code from occurring.

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