AutoCodes – GMC – B3031 2015 GMC Sierra

B3031 2015 GMC Sierra Code - Security System Controller In Learn Mode

Quick Answer

When learning a coded key, the Body Control Module (BCM) is placed in learn mode. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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: B3031 2015 GMC Sierra indicates Security System Controller In Learn Mode.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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 338

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 02, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3031 2015 GMC Sierra Description

When learning a coded key, the Body Control Module (BCM) is placed in learn mode. Diagnostic Trouble Code (DTC) B3031 will be set automatically as an indicator that the system is in learning mode and not as a fault indicator. On some model-year vehicles, the instructions for adding keys includes the direction to always use two learned keys. This DTC will be set if that direction is not followed. If only one learned key is available, then Replacing Keys must be performed. Once the coded key is learned, learn mode will be exited and the DTC cleared. If the BCM does not exit learn mode, DTC B3031 will remain current and indicate a fault. The instrument cluster security indicator will illuminate, and the driver information center will display a message.

OBDII Code B3031 2015 GMC Sierra - Security System Controller In Learn Mode - AutoCodes.com — B3031 2015 GMC Sierra Code - Security System Controller In Learn Mode

What does this mean?

What are the Possible Causes of the DTC B3031 2015 GMC Sierra?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC B3031 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 B3031 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 B3031 2015 GMC Sierra 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 B3031 2015 GMC Sierra Code

1. What does OBDII code B3031 for a 2015 GMC Sierra indicate?

The code B3031 indicates that the Security System Controller is in Learn Mode.

2. What are the common symptoms of a Security System Controller in Learn Mode issue?

Common symptoms include the vehicle not starting, the security light flashing, or the engine starting and then immediately stalling.

3. What are some possible causes of the Security System Controller being in Learn Mode?

Possible causes include a key fob issue, a problem with the ignition switch, a faulty security system controller, or a communication error between components.

4. How can I repair the Security System Controller Learn Mode issue on my 2015 GMC Sierra?

To repair this issue, you may need to reprogram the security system controller, replace the key fob, check the ignition switch, or have a professional diagnose and address any communication errors.

5. Can I reset the Security System Controller Learn Mode problem at home?

In some cases, you may be able to reset the system by disconnecting the vehicle's battery for a few minutes and then reconnecting it. However, it's recommended to consult the vehicle's manual or a professional technician for specific instructions.

6. Will the Security System Controller Learn Mode problem prevent my GMC Sierra from starting?

Yes, if the Security System Controller is stuck in Learn Mode, it can prevent your vehicle from starting or cause it to stall shortly after starting.

7. Can a faulty key fob cause the Security System Controller Learn Mode issue?

Yes, a malfunctioning key fob can lead to issues with the Security System Controller entering Learn Mode, as the controller may not recognize the key signal properly.

8. How do I know if the Security System Controller Learn Mode issue has been successfully resolved?

Once the issue has been repaired, the security light should stop flashing, and the vehicle should start and run smoothly without stalling immediately after starting.

9. Is it safe to continue driving my GMC Sierra with the Security System Controller in Learn Mode?

It is not recommended to drive your vehicle with the Security System Controller in Learn Mode, as it can cause starting and stalling issues, potentially leaving you stranded.

10. How long does it typically take to diagnose and repair a Security System Controller Learn Mode problem?

The time needed for diagnosis and repair can vary depending on the exact cause of the issue. Simple fixes like reprogramming may take a short time, while more complex issues could require more extensive troubleshooting and repair work.