AutoCodes – Generic – B1905

B1905 Code - Short 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: B1905 indicates Short 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 18,334

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 B1905 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 B1905 - Short in Front Pretensioner Squib Left Circuit - AutoCodes.com — B1905 Code - Short in Front Pretensioner Squib Left Circuit

What does this mean?

What are the Possible Causes of the DTC B1905?

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 B1905?

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 B1905 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 B1905 code?

Need more information on how to fix the B1905 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1905 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1905 Hyundai — Rain Sensor Fault 1
B1905 KIA — Rain Sensor Fault 1
B1905 Lexus — Short in Front Pretensioner Squib Left Circuit
B1905 Scion — Short in Front Pretensioner Squib Left Circuit
B1905 Toyota — Short 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 B1905 Code

1. What are the common symptoms of OBDII code B1905 - Short in Front Pretensioner Squib Left Circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the left front airbag in the event of an accident.

2. What are the possible causes of OBDII code B1905?

Possible causes of this code include a short circuit in the wiring of the front pretensioner squib left circuit, a faulty pretensioner squib, or a problem with the airbag control module.

3. How serious is OBDII code B1905 - Short in Front Pretensioner Squib Left Circuit?

This code is serious as it indicates a potential safety issue with the left front airbag system. It is important to address this code promptly to ensure the proper function of the airbag in the event of a collision.

4. Can I continue driving with OBDII code B1905 present?

It is not recommended to continue driving with this code present, as it may compromise the effectiveness of the left front airbag in the event of a crash. It is advisable to address the issue as soon as possible.

5. How can OBDII code B1905 be diagnosed?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault codes, followed by inspecting the wiring, connectors, and components of the front pretensioner squib left circuit to identify the source of the short circuit.

6. What are some repair tips for fixing OBDII code B1905?

Repair tips may include checking and repairing any damaged wiring or connectors in the front pretensioner squib left circuit, replacing the faulty pretensioner squib if needed, and resetting the airbag control module after the repairs are completed.

7. Can I reset the OBDII code B1905 on my own?

While you can attempt to clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring. If the problem persists, it is recommended to seek professional assistance.

8. Is it safe to attempt DIY repairs for OBDII code B1905?

Due to the critical nature of the airbag system, it is recommended to have repairs related to OBDII code B1905 performed by a qualified technician with experience in handling airbag systems to ensure proper diagnosis and repair.

9. How much does it typically cost to repair OBDII code B1905?

The cost of repairing this code can vary depending on the exact cause of the issue and the required repairs. Costs may include labor charges for diagnosis and repair, parts replacement, and any necessary reprogramming of the airbag control module.

10. Can OBDII code B1905 affect the overall safety of my vehicle?

Yes, OBDII code B1905 can affect the overall safety of your vehicle by potentially preventing the left front airbag from deploying in a collision. It is crucial to address this code promptly to ensure the proper functioning of the airbag system for driver and passenger safety.