AutoCodes – GMC – C0392 2018 GMC Sierra

C0392 2018 GMC Sierra Code - Transfer Case Range Position Sensor Circuit

Quick Answer

The Transfer Case Control Module receives input from the Transfer Case Gear Position Sensor, also known as the range position sensor or the rotational position sensor. Common causes include Faulty Transfer Case Range Position Sensor, Transfer Case Range Position Sensor harness is open or shorted, Transfer Case Range Position Sensor 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: C0392 2018 GMC Sierra indicates Transfer Case Range Position Sensor Circuit.
Common causes: Common causes include Faulty Transfer Case Range Position Sensor, Transfer Case Range Position Sensor harness is open or shorted, Transfer Case Range Position Sensor 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 265

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 11, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0392 2018 GMC Sierra Description

The Transfer Case Control Module receives input from the Transfer Case Gear Position Sensor, also known as the range position sensor or the rotational position sensor. The Gear Position Senso receives a 5-volt reference signal from the Transfer Case Control Module. In return the Gear Position Senso sends the Transfer Case Control Module a variable pulse width modulated signal indicating the position of the transfer case. The Gear Position Sensor works in conjunction with the range actuator position sensor, inside the A16 Transfer Case Motor, also known as the transfer case range actuator, to confirm the transfer case position. The Gear Position Sensor is more sensitive than the range actuator position sensor and is able to indicate to the Transfer Case Control Module the exact position of the transfer case between range changes. It is also able to show how much clutch activation is being commanded at any time.

OBDII Code C0392 2018 GMC Sierra - Transfer Case Range Position Sensor Circuit - AutoCodes.com — C0392 2018 GMC Sierra Code - Transfer Case Range Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC C0392 2018 GMC Sierra?

Faulty Transfer Case Range Position Sensor
Transfer Case Range Position Sensor harness is open or shorted
Transfer Case Range Position Sensor circuit poor electrical connection
Faulty Transfer Case Control Module

How to Fix the DTC C0392 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 does this mean?

Code Tech Notes

C0392:08 Transfer Case Range Position Sensor Circuit Performance Signal Invalid
C0392:28 Transfer Case Range Position Sensor Circuit Incorrect Frequency

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0392 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 C0392 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 C0392 2018 GMC Sierra Code

1. What does the OBDII code C0392 mean on a 2018 GMC Sierra?

C0392 indicates an issue with the Transfer Case Range Position Sensor Circuit, which monitors the position of the transfer case range selector.

2. What are the symptoms of code C0392 in a 2018 GMC Sierra?

Common symptoms include the 4WD system not engaging properly, warning lights on the dashboard, or the transfer case being stuck in one gear.

3. What causes the C0392 code on a GMC Sierra?

Possible causes include a faulty transfer case range position sensor, damaged wiring or connectors in the sensor circuit, or an issue with the transfer case control module.

4. Can I drive my 2018 GMC Sierra with the C0392 code?

While the vehicle may still be drivable, the 4WD system may not function properly, and itâ€™s recommended to address the issue to avoid further damage.

5. How do I diagnose the C0392 code on my GMC Sierra?

Start by inspecting the wiring and connectors for damage or corrosion, then test the transfer case range position sensor and the transfer case control module using a multimeter or scan tool.

6. How much does it cost to repair a C0392 code on a 2018 GMC Sierra?

The cost can vary, but replacing the transfer case range position sensor typically ranges from $200 to $400, depending on labor rates and parts pricing.

7. Can a bad transfer case range position sensor cause other problems?

Yes, it can lead to incorrect transfer case operation, potentially causing drivetrain stress or damage if not repaired promptly.

8. How do I clear the C0392 code after repairs?

Use an OBDII scan tool to clear the code after verifying that the issue has been resolved. If the problem persists, the code may return.

9. Is the C0392 code specific to GMC vehicles?

No, while it is common on GM vehicles like the 2018 GMC Sierra, this code can appear on other makes and models with similar transfer case systems.

10. What tools are needed to fix a C0392 code on a GMC Sierra?

Youâ€™ll typically need an OBDII scanner, a multimeter for electrical testing, and basic hand tools to remove and replace the sensor or repair wiring.