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Engine-Codes – Generic – B1906

B1906 Code - Open in Front Pretensioner Squib Left Circuit

Quick Answer

The B1906 code indicates that there is an open circuit in the Front Pretensioner Squib Left circuit of the vehicle. Common causes include Damaged wiring or connectors in the Front Pretensioner Squib Left circuit, Faulty pretensioner squib component, Corrosion or moisture in the electrical connections. 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 Damaged wiring or connectors in the Front Pretensioner Squib Left circuit, Faulty pretensioner squib component, Corrosion or moisture in the electrical connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B1906 Description

The B1906 code indicates that there is an open circuit in the Front Pretensioner Squib Left circuit of the vehicle. The pretensioner squib is a component of the seatbelt system that is designed to tighten the seatbelt in the event of a collision, ensuring that the occupant is held securely in place. An open circuit in this system means that the electrical connection in the circuit is interrupted, preventing the pretensioner squib from functioning properly. This can be a serious safety issue as it can affect the effectiveness of the seatbelt in a crash, potentially leading to increased risk of injury for the vehicle occupants.

OBDII Code B1906 - Open in Front Pretensioner Squib Left Circuit
B1906 Code - Open in Front Pretensioner Squib Left Circuit

Common Causes of B1906

  1. Damaged wiring or connectors in the Front Pretensioner Squib Left circuit
  2. Faulty pretensioner squib component
  3. Corrosion or moisture in the electrical connections
  4. Impact or damage to the vehicle that could have affected the seatbelt system
  5. Manufacturing defect in the seatbelt system components

Symptoms of B1906

  1. Airbag warning light illuminated on the dashboard
  2. Seatbelt warning light stays on
  3. Seatbelt does not retract properly
  4. Seatbelt feels loose or does not tighten during sudden stops or collisions

How to Fix B1906

  1. Begin by diagnosing the specific cause of the open circuit, using a diagnostic scanner to pinpoint the exact location of the fault.
  2. Inspect the wiring and connectors in the Front Pretensioner Squib Left circuit for any damage or corrosion. Repair or replace any damaged components.
  3. Test the pretensioner squib component to determine if it is functioning properly. Replace the component if necessary.
  4. Clear the diagnostic trouble codes from the vehicle's system to reset the airbag warning light.
  5. Perform a test drive to ensure that the seatbelt system is functioning correctly after repairs.

Cost to Fix B1906

The cost of repairing an open circuit in the Front Pretensioner Squib Left circuit can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the cost of parts for this repair can range from $100 to $300, while the labor costs can range from $150 to $400. Overall, the total repair cost could be anywhere from $250 to $700. It is important to note that these are rough estimates and actual costs may vary based on the vehicle make and model, as well as the labor rates in your area. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

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Code B1906 Information for Specific Makes

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.

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