B1906 Lexus 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 Lexus 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.
Code B1906 Lexus Description
What are the Possible Causes of the DTC B1906 Lexus?
- 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 Lexus?
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 Lexus 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.
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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.
Frequently Asked Questions about B1906 Lexus Code
1. What are the common symptoms of OBDII code B1906 in a Lexus related to the Open in Front Pretensioner Squib Left Circuit?
- Common symptoms include the airbag warning light staying illuminated on the dashboard and potential failure of the left front seatbelt pretensioner.
2. What are the possible causes of OBDII code B1906 in a Lexus?
- The code B1906 usually indicates an open circuit in the front pretensioner squib left side, which can be caused by wiring issues, a faulty pretensioner squib, or a loose connection.
3. How can I diagnose the Open in Front Pretensioner Squib Left Circuit issue in my Lexus?
- Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors for damage, and testing the pretensioner squib for continuity.
4. Can I continue to drive my Lexus with OBDII code B1906 present?
- It is not recommended to drive the vehicle with this code active, as it may affect the proper functioning of the seatbelt pretensioner system in the event of a collision.
5. How can I repair OBDII code B1906 related to the Front Pretensioner Squib Left Circuit in my Lexus?
- Repair may involve repairing or replacing damaged wiring, ensuring proper connection of the pretensioner squib, or replacing the pretensioner squib if it is faulty.
6. Are there any safety concerns associated with OBDII code B1906 in a Lexus?
- Yes, this code relates to the seatbelt pretensioner system, which is a critical safety feature designed to tighten the seatbelt in the event of a collision. It is important to address this issue promptly.
7. Can I reset the OBDII code B1906 in my Lexus without fixing the underlying issue?
- While you can clear the code temporarily, it will likely return until the root cause of the problem is addressed. It is recommended to fix the issue to ensure the proper operation of the seatbelt pretensioner system.
8. Is it possible to prevent OBDII code B1906 from occurring in my Lexus?
- Regular maintenance and inspection of the seatbelt pretensioner system, including checking the wiring and connectors, can help prevent issues that may trigger this fault code.
9. How much does it typically cost to repair OBDII code B1906 in a Lexus at a dealership or repair shop?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve diagnostic fees, parts replacement, and labor costs. It is advisable to consult with a professional for an accurate estimate.
10. Can I fix OBDII code B1906 related to the Front Pretensioner Squib Left Circuit in my Lexus myself?
- While some DIY enthusiasts may attempt to diagnose and repair this issue, it is recommended to have this problem addressed by a qualified technician or mechanic due to the safety-critical nature of the seatbelt pretensioner system.
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