AutoCodes – Generic – B1906

B1906 Code - Open in Front Pretensioner Squib Left Circuit

Quick Answer

The Front Pretensioner Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Left (LH). Common causes include Faulty Front Seat Outer Belt Assembly Left (LH) (Front Pretensioner Squib Left), Front Seat Outer Belt Assembly Left is open or shorted, Front Seat Outer Belt Assembly Left 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: B1906 indicates Open in Front Pretensioner Squib Left Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Left (LH) (Front Pretensioner Squib Left), Front Seat Outer Belt Assembly Left is open or shorted, Front Seat Outer Belt Assembly Left 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 32,205

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 Dec 07, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1906 Description

The Front Pretensioner Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Left (LH). This circuit instructs the Supplemental Restraint System (SRS) to deploy when the deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when a malfunction is detected in the Front Pretensioner Squib Left Circuit.

OBDII Code B1906 - Open in Front Pretensioner Squib Left Circuit - AutoCodes.com — B1906 Code - Open in Front Pretensioner Squib Left Circuit

What does this mean?

What are the Possible Causes of the DTC B1906?

Faulty Front Seat Outer Belt Assembly Left (LH) (Front Pretensioner Squib Left)
Front Seat Outer Belt Assembly Left is open or shorted
Front Seat Outer Belt Assembly Left poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1906?

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 B1906 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 B1906 code?

Need more information on how to fix the B1906 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1906 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1906 Hyundai — Front Sensor PWM Signal Fault
B1906 KIA — Front Sensor PWM Signal Fault
B1906 Lexus — Open in Front Pretensioner Squib Left Circuit
B1906 Scion — Open in Front Pretensioner Squib Left Circuit
B1906 Toyota — Open in Front Pretensioner Squib Left Circuit

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 B1906 Code

1. What are the common symptoms of OBDII code B1906?

The common symptoms of OBDII code B1906, which indicates an open in the Front Pretensioner Squib Left Circuit, include the airbag warning light illuminated on the dashboard and potential issues with the airbag system's functionality.

2. What can cause the OBDII code B1906 to trigger?

The OBDII code B1906 is typically triggered by an open circuit in the Front Pretensioner Squib Left Circuit, which may be caused by damaged wiring, a faulty pretensioner squib, or a poor electrical connection.

3. How serious is the OBDII code B1906?

The OBDII code B1906 related to an open in the Front Pretensioner Squib Left Circuit is a serious issue as it affects the proper functioning of the airbag system, potentially compromising occupant safety in the event of a collision.

4. How can I diagnose the OBDII code B1906?

Diagnosing the OBDII code B1906 involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connections in the Front Pretensioner Squib Left Circuit, and testing the pretensioner squib for continuity and proper operation.

5. Can I drive my vehicle with the OBDII code B1906 present?

It is not recommended to drive your vehicle with the OBDII code B1906 present, as it indicates a fault in the airbag system that may prevent the airbags from deploying correctly in the event of a collision.

6. How can I repair the OBDII code B1906?

Repairing the OBDII code B1906 involves identifying and fixing the open circuit in the Front Pretensioner Squib Left Circuit, which may require repairing or replacing damaged wiring, addressing faulty components, and ensuring proper electrical connections.

7. Are there any safety precautions to take when working on the Front Pretensioner Squib Left Circuit?

When working on the Front Pretensioner Squib Left Circuit to address the OBDII code B1906, it is essential to disconnect the vehicle's battery, follow proper airbag system handling procedures, and avoid accidental deployment of the airbags.

8. Can the OBDII code B1906 be intermittent?

Yes, the OBDII code B1906 related to an open in the Front Pretensioner Squib Left Circuit can sometimes be intermittent, making it important to thoroughly inspect the wiring and connections to identify and address the intermittent fault.

9. Will resetting the OBDII code B1906 make it go away permanently?

Simply resetting the OBDII code B1906 will not make it go away permanently if the underlying issue, such as an open circuit in the Front Pretensioner Squib Left Circuit, is not repaired. It is crucial to diagnose and fix the root cause of the fault.

10. Is it recommended to seek professional help for repairing the OBDII code B1906?

Due to the complexity and safety implications of working on the airbag system related to the OBDII code B1906, it is highly recommended to seek professional help from a qualified mechanic or technician to diagnose and repair the issue correctly.