AutoCodes – GMC – C0381 2018 GMC Sierra

C0381 2018 GMC Sierra Code - Range Actuator System Performance High Temperature

Quick Answer

The Transfer Case Motor, also known as the transfer case range actuator, is a bi-directional, permanent magnet, DC motor. Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case Motor 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: C0381 2018 GMC Sierra indicates Range Actuator System Performance High Temperature.
Common causes: Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case Motor 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 318

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 Jul 05, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0381 2018 GMC Sierra Description

The Transfer Case Motor, also known as the transfer case range actuator, is a bi-directional, permanent magnet, DC motor. When energized, through the transfer case clockwise circuit or transfer case counterclockwise circuit, the ground is provided by the opposing motor control circuit which becomes grounded through the transfer case control module ground circuit. The transfer case range actuator, through a series of gears, rotates the transfer case control actuator shaft which moves the transfer case two/four-wheel drive actuator cam and transfer case high/low shift fork in order to shift the transfer case between the following modes or ranges: 2WD, 4WD/AWD Automatic, 4WD High/Locked, 4WD Low and Neutral.

OBDII Code C0381 2018 GMC Sierra - Range Actuator System Performance High Temperature - AutoCodes.com — C0381 2018 GMC Sierra Code - Range Actuator System Performance High Temperature

What does this mean?

What are the Possible Causes of the DTC C0381 2018 GMC Sierra?

Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator)
Transfer Case Motor harness is open or shorted
Transfer Case Motor circuit poor electrical connection
Faulty Transfer Case Control Module

How to Fix the DTC C0381 2018 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 C0381 2018 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 C0381 2018 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 C0381 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code C0381 in a 2018 GMC Sierra?

The common symptoms of OBDII code C0381 (Range Actuator System Performance High Temperature) in a 2018 GMC Sierra include erratic shifting, decreased fuel efficiency, and the transmission staying in one gear.

2. What could cause OBDII code C0381 to trigger in a 2018 GMC Sierra?

The most common causes of OBDII code C0381 in a 2018 GMC Sierra are a faulty range actuator, high transmission fluid temperature, or a malfunction in the transmission control module.

3. How can I diagnose OBDII code C0381 in my 2018 GMC Sierra?

Diagnosing OBDII code C0381 involves using a diagnostic scanner to retrieve the code from the vehicle's computer system, checking the transmission fluid level and temperature, and inspecting the range actuator for any signs of damage.

4. What are some repair tips for fixing OBDII code C0381 in a 2018 GMC Sierra?

Repair tips for OBDII code C0381 may include replacing the faulty range actuator, checking and servicing the transmission fluid, resetting the transmission control module, and ensuring proper cooling system function.

5. Can driving with OBDII code C0381 present any risks to my 2018 GMC Sierra?

Driving with OBDII code C0381 can potentially cause further damage to the transmission system and may lead to reduced performance and fuel efficiency. It is recommended to address the issue promptly to avoid any long-term issues.

6. How much does it typically cost to repair OBDII code C0381 in a 2018 GMC Sierra?

The cost of repairing OBDII code C0381 in a 2018 GMC Sierra can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Is it possible to reset OBDII code C0381 in a 2018 GMC Sierra without making any repairs?

While you can clear the code using a diagnostic scanner, it is crucial to address the underlying issue causing OBDII code C0381 in a 2018 GMC Sierra to prevent further problems and ensure proper vehicle function.

8. How long does it typically take to repair OBDII code C0381 in a 2018 GMC Sierra?

The repair time for OBDII code C0381 in a 2018 GMC Sierra can vary depending on the extent of the issue and the availability of parts. It may take a few hours to a full day to complete the repair.

9. Can OBDII code C0381 in a 2018 GMC Sierra be a recurring issue after repair?

If the underlying cause of OBDII code C0381 is not fully addressed during the repair, it is possible for the issue to recur. It is essential to follow proper diagnostic procedures and ensure all related components are in good working condition.

10. Are there any preventative maintenance steps to avoid OBDII code C0381 in a 2018 GMC Sierra?

Regularly checking and servicing the transmission system, ensuring proper cooling system function, and addressing any issues promptly can help prevent OBDII code C0381 from occurring in a 2018 GMC Sierra.