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B3930 2018 GMC Sierra Code - Child Security Lock Motors Circuit

Quick Answer

The B3930 diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to the Child Security Lock Motors Circuit. Common causes include Faulty child security lock motors, Wiring issues or shorts in the circuit, Defective control module. 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
B3930 2018 GMC Sierra indicates Child Security Lock Motors Circuit.
Common causes
Common causes include Faulty child security lock motors, Wiring issues or shorts in the circuit, Defective control module.
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 B3930 2018 GMC Sierra Description

The B3930 diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to the Child Security Lock Motors Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the child security locks in the vehicle. The child security lock system is designed to prevent rear-seat passengers, particularly children, from opening the rear doors from inside the vehicle. When this circuit malfunctions, it can lead to issues with the proper functioning of the child security locks, potentially compromising the safety of passengers in the rear seats.

OBDII Code B3930 2018 GMC Sierra - Child Security Lock Motors Circuit
B3930 2018 GMC Sierra Code - Child Security Lock Motors Circuit

Common Causes of B3930 2018 GMC Sierra

  1. Faulty child security lock motors.
  2. Wiring issues or shorts in the circuit.
  3. Defective control module.
  4. Corrosion or damage to electrical connectors.
  5. Poor connections or loose wiring.

Symptoms of B3930 2018 GMC Sierra

  1. Inability to engage or disengage child security locks.
  2. Erratic behavior of child security lock system.
  3. Check engine light illuminated on the dashboard.
  4. Audible clicking or grinding noises when attempting to operate the child security locks.

How to Fix B3930 2018 GMC Sierra

  1. Diagnose the issue by connecting a diagnostic scan tool to retrieve the specific trouble code.
  2. Inspect the child security lock motors, wiring, and connectors for any visible damage or corrosion.
  3. Test the control module to ensure it is functioning correctly.
  4. Replace any faulty components, such as the child security lock motors, wiring, or control module.
  5. Clear the trouble code from the vehicle's memory and test the child security lock system to verify proper operation.

Cost to Fix B3930 2018 GMC Sierra

The cost of repairing a B3930 DTC related to the Child Security Lock Motors Circuit in a 2018 GMC Sierra can vary depending on the extent of the issue and the specific components that need replacement. On average, the parts required for this repair may range from $100 to $300, while labor costs can add an additional $100 to $200. Overall, the total repair cost could be around $200 to $500. However, it's important to note that actual costs may differ based on the location of the repair shop, the vehicle's make and model, and any additional diagnostics or repairs needed. It's recommended to obtain a detailed quote from a trusted auto repair professional before proceeding with the 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 B3930 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B3930 in a 2018 GMC Sierra related to the Child Security Lock Motors Circuit?

The common symptoms include malfunctioning child safety locks, issues with power door locks, and warning lights on the dashboard.

2. What can cause OBDII code B3930 in a 2018 GMC Sierra?

The code B3930 can be caused by faulty child security lock motors, damaged wiring or connectors, or issues with the control module.

3. How can I diagnose the Child Security Lock Motors Circuit issue in my 2018 GMC Sierra?

Diagnosis involves checking the child security lock motors for proper operation, inspecting wiring and connectors for damage, and using a diagnostic tool to read the OBDII codes.

4. Are there any quick checks I can perform before taking my 2018 GMC Sierra to a mechanic for OBDII code B3930?

You can manually test the child security lock motors, visually inspect the wiring and connectors, and reset the system by disconnecting the battery for a few minutes.

5. Can I repair OBDII code B3930 in my 2018 GMC Sierra myself?

Depending on your skill level and access to tools, you may be able to replace faulty child security lock motors, repair damaged wiring, or reset the system to clear the code.

6. Is it safe to continue driving my 2018 GMC Sierra with OBDII code B3930 related to the Child Security Lock Motors Circuit?

It is generally safe to drive, but it is recommended to address the issue promptly to ensure the child safety locks function correctly in case of an emergency.

7. Will resetting the OBDII code B3930 in my 2018 GMC Sierra make the problem go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue with the child security lock motors or circuitry is not fixed, the code is likely to reappear.

8. How much does it typically cost to repair OBDII code B3930 in a 2018 GMC Sierra at a professional auto repair shop?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B3930 in a 2018 GMC Sierra?

Yes, if you have the necessary tools, repair manuals, and skills, you may be able to diagnose and repair the issue related to the Child Security Lock Motors Circuit yourself.

10. Is it important to address OBDII code B3930 in my 2018 GMC Sierra promptly?

Yes, it is important to address the code promptly to ensure the proper functioning of the child safety locks and to prevent any potential safety hazards or inconvenience while operating the vehicle.

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