AutoCodes – Buick – B3930 Buick

B3930 Buick 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 Buick 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.

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Code Popularity 550

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 Jun 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3930 Buick 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 Buick - Child Security Lock Motors Circuit - AutoCodes.com — B3930 Buick Code - Child Security Lock Motors Circuit

What does this mean?

What are the Possible Causes of the DTC B3930 Buick?

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 Buick?

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 Buick 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.

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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 Buick Code

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

- Common symptoms include malfunctioning child security locks, inability to engage or disengage the child lock feature, and a corresponding warning light on the dashboard.

2. What are the possible causes of OBDII code B3930 in a Buick?

- The code B3930 in a Buick related to the Child Security Lock Motors Circuit can be caused by a faulty child security lock motor, damaged wiring or connectors, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code B3930 in my Buick?

- Diagnose the issue by checking the child security lock motors for proper functionality, inspecting the wiring and connectors for any damage, and using an OBDII scanner to read and clear the trouble code.

4. Can I repair OBDII code B3930 in my Buick by myself?

- Depending on your level of automotive expertise, you may be able to repair the issue related to code B3930 by replacing the faulty child security lock motor, repairing damaged wiring, or resetting the control module.

5. Is it safe to drive my Buick with OBDII code B3930 present?

- It is generally safe to drive your Buick with code B3930, but you may experience issues with the child security lock feature. It is recommended to address the problem promptly to ensure the safety of passengers, especially children.

6. How much does it typically cost to repair OBDII code B3930 in a Buick?

- The cost of repairing OBDII code B3930 in a Buick can vary depending on the specific cause of the issue, but it may range from around $100 to $300 for parts and labor.

7. Can resetting the OBDII system clear code B3930 in my Buick?

- Resetting the OBDII system may temporarily clear code B3930, but if the underlying issue is not addressed, the code is likely to reappear. It is recommended to diagnose and repair the root cause of the problem.

8. Are there any preventative maintenance tips to avoid OBDII code B3930 in a Buick?

- To prevent OBDII code B3930 related to the Child Security Lock Motors Circuit in a Buick, regularly check and maintain the child security lock system, inspect wiring for damage, and address any issues promptly.

9. Can a malfunctioning child security lock motor cause any other problems in my Buick besides triggering OBDII code B3930?

- Yes, a malfunctioning child security lock motor can also lead to issues with the overall security system of your Buick, affecting the safety and functionality of the vehicle.

10. How long does it typically take to repair OBDII code B3930 in a Buick?

- The repair time for OBDII code B3930 in a Buick can vary depending on the specific cause of the issue and the complexity of the repair. It may take anywhere from 1 to 3 hours for a professional technician to diagnose and fix the problem.