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B3930 2018 Chevrolet Silverado Code - Child Security Lock Motors Circuit

Quick Answer

The B3930 diagnostic trouble code for a 2018 Chevrolet Silverado relates to the Child Security Lock Motors Circuit. Common causes include Faulty child security lock motors, Wiring issues or shorts in the child security lock circuit, Faulty body control module (BCM). 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 Chevrolet Silverado indicates Child Security Lock Motors Circuit.
Common causes
Common causes include Faulty child security lock motors, Wiring issues or shorts in the child security lock circuit, Faulty body control module (BCM).
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 Chevrolet Silverado Description

The B3930 diagnostic trouble code for a 2018 Chevrolet Silverado relates to the Child Security Lock Motors Circuit. This code indicates a malfunction in the circuit that controls the child safety locks in the vehicle. The child security lock motors are responsible for preventing the rear doors from being opened from the inside, ensuring the safety of children or passengers seated in the back seats.

OBDII Code B3930 2018 Chevrolet Silverado - Child Security Lock Motors Circuit
B3930 2018 Chevrolet Silverado Code - Child Security Lock Motors Circuit

Common Causes of B3930 2018 Chevrolet Silverado

  1. Faulty child security lock motors.
  2. Wiring issues or shorts in the child security lock circuit.
  3. Faulty body control module (BCM).
  4. Corrosion or poor connections in the wiring harness.
  5. Impact or physical damage to the child security lock mechanisms.

Symptoms of B3930 2018 Chevrolet Silverado

  1. Rear doors can be opened from the inside even with child safety locks engaged.
  2. Child security lock indicator light on the dashboard may illuminate.
  3. Unusual clicking or grinding noises when attempting to engage or disengage child safety locks.
  4. Child safety locks fail to engage or disengage when using the door controls.

How to Fix B3930 2018 Chevrolet Silverado

  1. Begin by conducting a visual inspection of the child security lock motors and wiring. Look for any signs of damage, corrosion, or loose connections.
  2. Use a multimeter to test the continuity of the wiring in the child security lock circuit. Replace any damaged or faulty wiring as needed.
  3. Test the child security lock motors for proper functionality. If they are not working correctly, replace them with new units.
  4. Check the body control module (BCM) for any fault codes related to the child security lock circuit. If necessary, reprogram or replace the BCM.
  5. Clear the B3930 trouble code from the vehicle's computer using a diagnostic scan tool after completing the repairs.

Cost to Fix B3930 2018 Chevrolet Silverado

The typical repair costs for addressing the B3930 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing faulty child security lock motors or repairing wiring issues may cost between $200 to $500, including parts and labor. However, if the problem is more complex and requires BCM replacement, the repair costs could range from $500 to $1000 or more.

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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 Chevrolet Silverado Code

1. What does OBDII code B3930 for the Child Security Lock Motors Circuit mean?

The B3930 code indicates a malfunction in the circuit responsible for controlling the child security lock motors in a 2018 Chevrolet Silverado.

2. What are the common symptoms of OBDII code B3930 in a 2018 Chevrolet Silverado?

Common symptoms of code B3930 may include malfunctioning child security locks, inability to engage or disengage child locks electronically, and illuminated warning lights on the dashboard.

3. What can cause OBDII code B3930 to trigger in a 2018 Chevrolet Silverado?

Possible causes of code B3930 include faulty child lock motors, damaged wiring or connectors in the circuit, a blown fuse, or a problem with the control module.

4. How can I diagnose OBDII code B3930 in my 2018 Chevrolet Silverado?

Diagnosing code B3930 typically involves inspecting the child security lock motors, checking the wiring and connectors for damage, testing the fuses related to the circuit, and using a diagnostic scanner to pinpoint the exact issue.

5. Are there any simple repairs I can try for OBDII code B3930 in my 2018 Chevrolet Silverado?

Simple repairs for code B3930 may include checking and replacing blown fuses, repairing damaged wiring or connectors, and ensuring the child lock motors are functioning properly.

6. Can I drive my 2018 Chevrolet Silverado with OBDII code B3930?

It is generally safe to drive with code B3930, but it is recommended to address the issue promptly to ensure the child security lock system functions correctly in case of an emergency.

7. How much does it cost to repair OBDII code B3930 in a 2018 Chevrolet Silverado?

The cost of repairing code B3930 can vary depending on the exact cause of the issue, but it may range from a simple fuse replacement to more extensive repairs involving the child lock motors or wiring.

8. Is OBDII code B3930 a common problem in 2018 Chevrolet Silverado vehicles?

While not extremely common, issues with the child security lock motors circuit, resulting in code B3930, can occur in 2018 Chevrolet Silverado vehicles due to various factors like wear and tear or electrical faults.

9. Can I reset OBDII code B3930 in my 2018 Chevrolet Silverado without repairs?

Resetting the code without addressing the underlying issue may temporarily turn off the warning light, but the problem will likely reoccur until the root cause is resolved.

10. How can I prevent OBDII code B3930 from appearing in my 2018 Chevrolet Silverado?

To prevent code B3930, regular maintenance checks, including inspecting the child lock system and associated wiring, can help identify potential issues early and prevent the code from triggering.

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