AutoCodes – Lexus – B1925 Lexus

B1925 Lexus Code - Short 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: B1925 Lexus indicates Short 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 3,347

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 B1925 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 B1925 Lexus - Short In Rear Pretensioner Squib LH Circuit - AutoCodes.com — B1925 Lexus Code - Short In Rear Pretensioner Squib LH Circuit

What does this mean?

What are the Possible Causes of the DTC B1925 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 B1925 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 B1925 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 B1925 Lexus code?

Need more information on how to fix the B1925 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1925 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 B1925 Lexus Code

1. What are the common symptoms of OBDII code B1925 in a Lexus related to a short in the rear pretensioner squib LH circuit?

The common symptoms include the airbag warning light illuminated on the dashboard and potential issues with the vehicle's safety restraint system.

2. What are the possible causes of the B1925 error code indicating a short in the rear pretensioner squib LH circuit in a Lexus?

The code can be triggered by wiring issues, a faulty pretensioner squib LH, a blown fuse, or a malfunctioning airbag control module.

3. How serious is the B1925 OBDII code related to a short in the rear pretensioner squib LH circuit in a Lexus?

This code should be taken seriously as it indicates a potential safety risk in the event of a collision, as the rear pretensioner squib LH may not deploy correctly to protect occupants.

4. Can I continue driving my Lexus with the B1925 code present?

It is not recommended to continue driving the vehicle with this code active, as it could compromise the effectiveness of the safety restraint system in the event of an accident.

5. How can I diagnose and repair the B1925 OBDII code for a short in the rear pretensioner squib LH circuit in my Lexus?

Diagnosing and repairing this code typically requires specialized diagnostic tools to pinpoint the exact cause, followed by repairing or replacing the faulty component, such as the wiring, pretensioner squib LH, or airbag control module.

6. Is it safe to reset the B1925 error code on my Lexus without fixing the underlying issue?

Resetting the code without addressing the root cause can temporarily clear the warning light but will not resolve the safety concern associated with the short in the rear pretensioner squib LH circuit.

7. How much does it cost to repair the B1925 OBDII code indicating a short in the rear pretensioner squib LH circuit in a Lexus?

The cost of repair can vary depending on the specific cause of the issue, but it may involve labor costs for diagnosis and replacement of components, potentially ranging from a few hundred to over a thousand dollars.

8. Can I fix the B1925 code related to the rear pretensioner squib LH circuit issue in my Lexus at home?

While some DIY enthusiasts may attempt to diagnose and repair the issue at home, it is recommended to seek professional help due to the complexity and safety implications of working on the vehicle's safety systems.

9. How long does it typically take to repair the B1925 OBDII code for a short in the rear pretensioner squib LH circuit in a Lexus?

The repair time can vary based on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day for a professional technician to diagnose and fix the problem.

10. Will fixing the B1925 error code in my Lexus require reprogramming or resetting the airbag control module?

In some cases, repairing the issue may require reprogramming or resetting the airbag control module to ensure proper functionality and to clear the error code from the system.