AutoCodes – GMC – B3031 2018 GMC Sierra

B3031 2018 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 2018 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 237

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 2018 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 2018 GMC Sierra - Security System Controller In Learn Mode - AutoCodes.com — B3031 2018 GMC Sierra Code - Security System Controller In Learn Mode

What does this mean?

What are the Possible Causes of the DTC B3031 2018 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 2018 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 2018 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 2018 GMC Sierra code?

Need more information on how to fix the B3031 2018 GMC Sierra code? Get Access to Factory Service Manuals

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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 2018 GMC Sierra Code

1. What does OBDII code B3031 mean for a 2018 GMC Sierra?

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

2. What are the common symptoms of OBDII code B3031 in a 2018 GMC Sierra?

Common symptoms may include issues with the vehicle's security system, such as difficulty starting the engine or the security light staying illuminated.

3. What are the possible causes of OBDII code B3031 in a 2018 GMC Sierra?

Possible causes include a fault in the security system controller, a malfunctioning key fob, or issues with the vehicle's anti-theft system.

4. How can I diagnose OBDII code B3031 in my 2018 GMC Sierra?

Diagnosing this code typically requires using a professional OBDII scanner to retrieve the specific error codes and identify the source of the issue within the security system.

5. Can I still drive my 2018 GMC Sierra with OBDII code B3031 present?

While the vehicle may still be operable with this code present, it is recommended to address the underlying issue as soon as possible to prevent potential security system malfunctions.

6. How can I repair OBDII code B3031 in my 2018 GMC Sierra?

Repairing this code may involve resetting the security system, reprogramming key fobs, or replacing the security system controller if necessary.

7. Is it possible to reset the Security System Controller from Learn Mode without professional help?

In some cases, it may be possible to reset the Security System Controller from Learn Mode by following the manufacturer's instructions provided in the vehicle's manual.

8. How much does it typically cost to repair OBDII code B3031 in a 2018 GMC Sierra?

The cost of repairing this code can vary depending on the specific repairs needed, such as reprogramming key fobs or replacing the security system controller. It is recommended to consult a professional for an accurate estimate.

9. Will OBDII code B3031 cause any long-term damage to my 2018 GMC Sierra if left unresolved?

Leaving this code unresolved may lead to continued issues with the security system and potentially cause inconvenience or security risks. It is advisable to address the problem promptly.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B3031 in a 2018 GMC Sierra?

While some basic troubleshooting steps can be attempted by a DIY enthusiast, addressing complex security system issues like this code may require professional expertise and specialized tools.