AutoCodes – Toyota – B1149 Toyota

B1149 Toyota Code - Front Airbag Sensor LH Circuit Malfunction

Quick Answer

The Front Airbag Sensor (Left Side) circuit consists of the diagnosis circuit and the frontal deceleration sensor, etc. Common causes include Faulty Front Airbag Sensor (Left Side), Front Airbag Sensor (Left Side) harness is open or shorted, Front Airbag Sensor (Left Side) 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: B1149 Toyota indicates Front Airbag Sensor LH Circuit Malfunction.
Common causes: Common causes include Faulty Front Airbag Sensor (Left Side), Front Airbag Sensor (Left Side) harness is open or shorted, Front Airbag Sensor (Left Side) 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 5,558

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 Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1149 Toyota Description

The Front Airbag Sensor (Left Side) circuit consists of the diagnosis circuit and the frontal deceleration sensor, etc. If the Airbag Sensor Assembly Center receives signals from the frontal deceleration sensor, it judges whether or not the Supplemental Restraint System (SRS) should be activated. The Diagnostic Trouble Code (DTC) B1149 is recorded when a malfunction is detected in the Front Airbag Sensor (Left Side) circuit.

OBDII Code B1149 Toyota - Front Airbag Sensor LH Circuit Malfunction - AutoCodes.com — B1149 Toyota Code - Front Airbag Sensor LH Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B1149 Toyota?

Faulty Front Airbag Sensor (Left Side)
Front Airbag Sensor (Left Side) harness is open or shorted
Front Airbag Sensor (Left Side) circuit poor electrical connection
Faulty Airbag Sensor Assembly Center

How to Fix the DTC B1149 Toyota?

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 B1149 Toyota 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 B1149 Toyota code?

Need more information on how to fix the B1149 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1149 Toyota 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 B1149 Toyota Code

1. What are the common symptoms of OBDII code B1149 Toyota (Front Airbag Sensor LH Circuit Malfunction)?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the front airbag system.

2. What are some possible causes of the B1149 code in a Toyota vehicle?

- Possible causes include a faulty front airbag sensor LH, damaged wiring or connectors in the circuit, or a malfunctioning airbag control module.

3. How serious is the B1149 code in a Toyota vehicle?

- The B1149 code indicates a malfunction in the front airbag sensor LH circuit, which can affect the proper deployment of the airbag system in the event of a collision. It is important to address this issue promptly for safety reasons.

4. Can I continue driving my Toyota with the B1149 code present?

- It is not recommended to continue driving the vehicle with the B1149 code present, as it may compromise the functionality of the front airbag system. Have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair the B1149 code in my Toyota?

- Diagnosis typically involves inspecting the front airbag sensor LH, checking the wiring and connectors for damage, and testing the airbag control module. Repair may involve replacing the faulty sensor, repairing wiring issues, or resetting the airbag system.

6. Is it possible to reset the B1149 code in a Toyota without fixing the underlying issue?

- While clearing the diagnostic trouble codes (DTCs) can temporarily turn off the warning light, the underlying issue causing the B1149 code will persist. It is essential to address the root cause of the problem for a permanent solution.

7. How much does it cost to repair the B1149 code in a Toyota?

- The cost of repairing the B1149 code can vary depending on the specific issue causing the malfunction. Costs may include parts replacement, labor charges, and diagnostic fees. It is advisable to consult a professional technician for an accurate estimate.

8. Can a DIY enthusiast fix the B1149 code in a Toyota at home?

- While some DIY enthusiasts may have the skills to diagnose and repair wiring issues or sensor replacements, dealing with airbag systems requires specialized knowledge and safety precautions. It is recommended to seek professional help for this type of repair.

9. Are there any recalls or technical service bulletins related to the B1149 code in Toyota vehicles?

- It is advisable to check with Toyota dealerships or the manufacturer's website for any recalls or technical service bulletins related to the B1149 code. These resources may provide important information about known issues and solutions.

10. How can I prevent the B1149 code from recurring in my Toyota?

- To prevent the B1149 code from recurring, follow regular maintenance schedules, address any warning lights promptly, and avoid tampering with the airbag system. Keeping the vehicle in good condition can help prevent such issues in the future.