AutoCodesChevrolet – B3930 2017 Chevrolet Silverado

B3930 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado 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 231
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 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado - Child Security Lock Motors Circuit - AutoCodes.com
B3930 2017 Chevrolet Silverado Code - Child Security Lock Motors Circuit

What are the Possible Causes of the DTC B3930 2017 Chevrolet Silverado?

  • 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 2017 Chevrolet Silverado?

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 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado code?

Need more information on how to fix the B3930 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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 2017 Chevrolet Silverado Code

1. What does the OBDII code B3930 mean on a 2017 Chevrolet Silverado?

The B3930 code indicates an issue with the Child Security Lock Motors Circuit, which controls the rear door child safety locks.

2. What are the common symptoms of the B3930 code?

Typical symptoms include the child safety locks not engaging or disengaging properly and possibly a warning light or message on the dashboard.

3. What causes the B3930 code to appear?

The code is often triggered by a faulty child security lock motor, damaged wiring, poor electrical connections, or a malfunctioning door module.

4. How can I diagnose the B3930 code?

Start by using a diagnostic scanner to confirm the code, then inspect the wiring, connectors, and child security lock motor for damage or signs of wear.

5. Can a blown fuse cause the B3930 code?

Yes, a blown fuse in the circuit powering the child security lock motors can cause this code to appear.

6. How do I fix the B3930 code on my 2017 Chevrolet Silverado?

Repairs may include replacing the child security lock motor, repairing or replacing damaged wiring or connectors, or reprogramming the door control module if needed.

7. Is the B3930 code a serious issue?

While it doesn’t affect drivability, it can compromise the safety feature of the child locks, posing a risk if children are passengers.

8. How much does it cost to fix the B3930 code?

Repair costs can vary depending on the exact issue but may range from $100 to $500, depending on parts and labor.

9. Can I drive my Silverado with the B3930 code active?

Yes, you can drive the vehicle, but the child safety locks may not function properly, which could be a safety concern for passengers.

10. Do I need to reset the code after repairs?

Yes, after fixing the issue, you’ll need to clear the code using an OBDII scanner to ensure it doesn’t reappear.

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