AutoCodes – GMC – B3930 2015 GMC Sierra

B3930 2015 GMC Sierra Code - Child Security Lock Motors Circuit

Quick Answer

The Body Control Module (BCM) controls the Child Security Lock Relay when it receives a command to lockout the rear doors. Common causes include Faulty Child Security Lock Relay, Child Security Lock Relay harness is open or shorted, Child Security Lock Relay 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
B3930 2015 GMC Sierra indicates Child Security Lock Motors Circuit.
Common causes
Common causes include Faulty Child Security Lock Relay, Child Security Lock Relay harness is open or shorted, Child Security Lock Relay 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 295
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 17, 2023
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Code B3930 2015 GMC Sierra Description

The Body Control Module (BCM) controls the Child Security Lock Relay when it receives a command to lockout the rear doors. The relay will apply voltage to both child security circuits at the rear door latches to disable the interior door handles. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to voltage, short to ground or an open/high resistance on the child security lock disable relay control circuit.
OBDII Code B3930 2015 GMC Sierra - Child Security Lock Motors Circuit - AutoCodes.com
B3930 2015 GMC Sierra Code - Child Security Lock Motors Circuit

What are the Possible Causes of the DTC B3930 2015 GMC Sierra?

  • Faulty Child Security Lock Relay
  • Child Security Lock Relay harness is open or shorted
  • Child Security Lock Relay circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B3930 2015 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 B3930 2015 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 B3930 2015 GMC Sierra code?

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Need Help with the 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 B3930 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B3930 in a 2015 GMC Sierra related to the Child Security Lock Motors Circuit?

The common symptoms include malfunctioning child safety locks, inability to engage or disengage the child security locks, and potential issues with the power door locks.

2. What are the possible causes of OBDII code B3930 in a 2015 GMC Sierra?

Possible causes may include faulty child security lock motors, damaged wiring or connectors in the circuit, a malfunctioning control module, or a blown fuse related to the child security lock system.

3. How can I diagnose the Child Security Lock Motors Circuit issue causing OBDII code B3930 in my 2015 GMC Sierra?

You can diagnose the problem by inspecting the child security lock motors, checking the wiring and connectors for any damage, testing the control module, and verifying the fuse related to the child security lock system.

4. Can I repair OBDII code B3930 in my 2015 GMC Sierra related to the Child Security Lock Motors Circuit myself?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair the issue yourself by replacing faulty child security lock motors, repairing damaged wiring or connectors, or addressing any other identified problems in the circuit.

5. Are there any specific repair tips for fixing OBDII code B3930 in a 2015 GMC Sierra?

Ensure you have the correct replacement parts for the child security lock motors if they are faulty, use a multimeter to test the continuity of wiring and connectors, and refer to the vehicle's service manual for detailed troubleshooting and repair procedures.

6. Can OBDII code B3930 in a 2015 GMC Sierra related to the Child Security Lock Motors Circuit cause any safety concerns?

While the code itself may not pose immediate safety risks, a malfunctioning child security lock system can compromise the safety of passengers, especially children, in the vehicle. It is essential to address the issue promptly.

7. How does the Child Security Lock Motors Circuit work in a 2015 GMC Sierra?

The Child Security Lock Motors Circuit controls the operation of the child safety locks in the vehicle, allowing the driver to engage or disengage the locks to prevent children from opening the rear doors from inside the vehicle.

8. Is resetting the OBDII code B3930 in a 2015 GMC Sierra related to the Child Security Lock Motors Circuit a temporary solution?

Resetting the code may temporarily clear the error code from the vehicle's system, but if the underlying issue causing the code is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.

9. Can extreme weather conditions affect the Child Security Lock Motors Circuit and trigger OBDII code B3930 in a 2015 GMC Sierra?

Extreme weather conditions such as extreme cold or heat can potentially affect the operation of the child security lock motors or the wiring in the circuit, leading to malfunctions and triggering the OBDII code B3930.

10. How much does it typically cost to repair OBDII code B3930 in a 2015 GMC Sierra related to the Child Security Lock Motors Circuit?

The cost of repairs can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to repair the problem yourself or take the vehicle to a professional mechanic. Costs may include parts, labor, and diagnostic fees.

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