AutoCodes – Lexus – B1926 Lexus

B1926 Lexus Code - Open In Rear Pretensioner Squib LH Circuit

Quick Answer

The Rear Pretensioner Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Seat Outer Belt Assembly Left (LH). Common causes include Faulty Seat Outer Belt Assembly Left (LH) (Rear Pretensioner Squib LH), Seat Outer Belt Assembly Left (LH) harness is open or shorted, Seat Outer Belt Assembly Left (LH) 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: B1926 Lexus indicates Open In Rear Pretensioner Squib LH Circuit.
Common causes: Common causes include Faulty Seat Outer Belt Assembly Left (LH) (Rear Pretensioner Squib LH), Seat Outer Belt Assembly Left (LH) harness is open or shorted, Seat Outer Belt Assembly Left (LH) 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 5,459

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 Jul 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1926 Lexus Description

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

OBDII Code B1926 Lexus - Open In Rear Pretensioner Squib LH Circuit - AutoCodes.com — B1926 Lexus Code - Open In Rear Pretensioner Squib LH Circuit

What does this mean?

What are the Possible Causes of the DTC B1926 Lexus?

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

How to Fix the DTC B1926 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 B1926 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.

Need more information about the B1926 Lexus code?

Need more information on how to fix the B1926 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1926 Lexus code diagnosed by a professional: Find a repair shop in your area

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 B1926 Lexus Code

1. What are common symptoms of the OBDII code B1926 in a Lexus related to an open in the rear pretensioner squib LH circuit?

The common symptoms include the airbag warning light staying illuminated on the dashboard and potential non-deployment of the seatbelt pretensioner in the event of a collision.

2. What are possible causes of the B1926 code indicating an open in the rear pretensioner squib LH circuit in a Lexus?

Possible causes include a faulty pretensioner squib LH unit, damaged wiring or connectors in the circuit, or a problem with the airbag control module.

3. How can I diagnose the issue behind the B1926 code in my Lexus's rear pretensioner squib LH circuit?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific trouble code, inspecting the wiring and connectors for any visible damage, and testing the pretensioner squib LH unit for proper functionality.

4. Can I drive my Lexus with the B1926 code present in the rear pretensioner squib LH circuit?

It is not recommended to drive the vehicle with the B1926 code active, as the seatbelt pretensioner system may not function properly in the event of a collision, compromising occupant safety.

5. How can I repair the open in the rear pretensioner squib LH circuit issue in my Lexus?

Repair options may include replacing the faulty pretensioner squib LH unit, repairing or replacing damaged wiring and connectors, or resetting the airbag control module after addressing the root cause of the problem.

6. Are there any safety precautions I should take when working on the rear pretensioner squib LH circuit in my Lexus?

Prior to working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for at least 10-15 minutes to allow any stored electrical energy to dissipate to reduce the risk of accidental airbag deployment.

7. How much does it typically cost to fix the B1926 code related to the rear pretensioner squib LH circuit in a Lexus?

The cost of repairs can vary depending on the exact cause of the issue, but it may involve parts replacement, labor costs, and potential diagnostic fees, with the total cost ranging from a few hundred to over a thousand dollars.

8. Can I reset the B1926 code related to the rear pretensioner squib LH circuit in my Lexus without addressing the underlying problem?

Resetting the code without fixing the root cause will only turn off the warning light temporarily, as the issue will persist and the code will likely reappear once the system detects the problem during subsequent scans.

9. Is it possible to clear the B1926 code associated with the rear pretensioner squib LH circuit in my Lexus without professional help?

While it is possible to clear the code using an OBDII scanner, it is crucial to address the underlying problem causing the code to ensure the proper functioning of the seatbelt pretensioner system and overall safety.

10. How long does it take to fix the B1926 code indicating an open in the rear pretensioner squib LH circuit in a Lexus?

The repair time can vary based on the specific issue and the expertise of the technician, but it typically takes a few hours to a full day to diagnose the problem, perform the necessary repairs, and reset the system to clear the code.