AutoCodes – Generic – B0031

B0031 Code - Second Row Left Frontal Stage 1 Deployment Control

Quick Answer

When the ignition switch is turned to RUN position, Sensing and Diagnostic Module (SDM) performs tests to diagnose critical internal malfunctions. Common causes include Faulty Second Row Left Frontal Air Bag, Second Row Left Frontal Air Bag harness is open or shorted, Second Row Left Frontal Air Bag 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: B0031 indicates Second Row Left Frontal Stage 1 Deployment Control.
Common causes: Common causes include Faulty Second Row Left Frontal Air Bag, Second Row Left Frontal Air Bag harness is open or shorted, Second Row Left Frontal Air Bag 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 7,893

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0031 Description

When the ignition switch is turned to RUN position, Sensing and Diagnostic Module (SDM) performs tests to diagnose critical internal malfunctions. SDM then performs deployment loop voltage out of range test and deployment loop resistance measurement test. If voltage out of range test detects a short to voltage condition, the resistance measurement test will not be performed.

OBDII Code B0031 - Second Row Left Frontal Stage 1 Deployment Control - AutoCodes.com — B0031 Code - Second Row Left Frontal Stage 1 Deployment Control

What does this mean?

What are the Possible Causes of the DTC B0031?

Faulty Second Row Left Frontal Air Bag
Second Row Left Frontal Air Bag harness is open or shorted
Second Row Left Frontal Air Bag circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0031?

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 B0031 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 B0031 code?

Need more information on how to fix the B0031 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0031 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0031 Buick — Second Row Left Frontal Stage 1 Deployment Control
B0031 Cadillac — Second Row Left Frontal Stage 1 Deployment Control
B0031 Chevrolet — Second Row Left Frontal Stage 1 Deployment Control
B0031 GMC — Second Row Left Frontal Stage 1 Deployment Control

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B0031 Code

1. What are the common symptoms of OBDII code B0031?

- The common symptoms of OBDII code B0031 include the airbag warning light illuminating on the dashboard and a potential non-deployment of the left frontal airbag in the second-row seating area.

2. What are the possible causes of OBDII code B0031?

- The possible causes of OBDII code B0031 include a faulty frontal airbag sensor, damaged wiring or connectors in the airbag system, or a malfunctioning airbag control module.

3. How can I diagnose OBDII code B0031?

- Diagnosing OBDII code B0031 typically involves using a diagnostic scan tool to retrieve the specific fault code, inspecting the wiring and connectors related to the left frontal airbag system, and testing the airbag sensor and control module for proper functionality.

4. Is it safe to drive with OBDII code B0031 present?

- It is not recommended to drive with OBDII code B0031 present, as it indicates a potential issue with the left frontal airbag deployment system, which could compromise the safety of the vehicle occupants in the event of a collision.

5. How can OBDII code B0031 be repaired?

- Repairing OBDII code B0031 may involve replacing the faulty left frontal airbag sensor, repairing or replacing damaged wiring or connectors, or reprogramming the airbag control module to clear the fault code and ensure proper functionality.

6. Can I reset OBDII code B0031 without fixing the underlying issue?

- While it is possible to clear the fault code temporarily by resetting the vehicle's computer, it is not recommended to do so without addressing the underlying issue causing OBDII code B0031, as it could pose a safety risk in the event of a collision.

7. Are there any DIY repair tips for OBDII code B0031?

- DIY repair tips for OBDII code B0031 may include checking and securing the wiring connections related to the left frontal airbag system, inspecting for any visible damage or corrosion, and ensuring all components are properly connected and functioning.

8. Can a mechanic help with diagnosing and fixing OBDII code B0031?

- Yes, a qualified mechanic can assist with diagnosing and fixing OBDII code B0031 by using specialized diagnostic tools, conducting thorough inspections of the airbag system components, and performing any necessary repairs or replacements.

9. How much does it cost to repair OBDII code B0031?

- The cost to repair OBDII code B0031 can vary depending on the specific cause of the issue, the extent of the repairs needed, and labor rates in your area. It is recommended to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

10. Can OBDII code B0031 affect the overall safety of my vehicle?

- Yes, OBDII code B0031 can affect the overall safety of your vehicle, as it indicates a potential malfunction in the left frontal airbag deployment system, which is designed to protect occupants in the event of a collision. It is important to address this issue promptly to ensure the airbag system functions as intended.