B1149 Lexus 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 Lexus 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.
Code B1149 Lexus Description
What are the Possible Causes of the DTC B1149 Lexus?
- 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 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 B1149 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 B1149 Lexus code?
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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 B1149 Lexus Code
1. What are the common symptoms of OBDII code B1149 in a Lexus related to the Front Airbag Sensor LH Circuit Malfunction?
- Common symptoms include the airbag warning light being illuminated on the dashboard, the airbag system being disabled, and potential issues with the front airbag deployment in case of an accident.
2. What are the possible causes of the Front Airbag Sensor LH Circuit Malfunction in a Lexus triggering the B1149 code?
- Possible causes may include a faulty front airbag sensor LH, damaged wiring or connectors in the circuit, or a malfunction in the airbag control module.
3. How can I diagnose the Front Airbag Sensor LH Circuit Malfunction related to OBDII code B1149 in my Lexus?
- Diagnosis involves using an OBDII scanner to retrieve the specific B1149 code, inspecting the front airbag sensor LH and its connections, and checking for any visible damage or issues in the circuit.
4. Can I repair the Front Airbag Sensor LH Circuit Malfunction causing the B1149 code in my Lexus at home?
- Repairing the issue at home may be possible if you have the necessary tools and expertise. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair to ensure proper airbag system functionality.
5. Is it safe to drive my Lexus with the OBDII code B1149 related to the Front Airbag Sensor LH Circuit Malfunction?
- It is not recommended to drive the vehicle with a malfunctioning front airbag sensor LH, as it may compromise the airbag system's effectiveness in case of a collision. Have the issue addressed promptly for safety reasons.
6. How much does it typically cost to repair the Front Airbag Sensor LH Circuit Malfunction causing the B1149 code in a Lexus?
- Repair costs can vary depending on the exact cause of the malfunction and the labor rates of the repair shop. It is advisable to get quotes from different mechanics to compare prices before proceeding with the repair.
7. Can resetting the OBDII system clear the B1149 code associated with the Front Airbag Sensor LH Circuit Malfunction in my Lexus?
- Resetting the OBDII system may temporarily clear the code, but it will reappear if the underlying issue causing the Front Airbag Sensor LH Circuit Malfunction is not addressed. It is crucial to diagnose and fix the root cause of the problem.
8. Are there any safety precautions to keep in mind when working on the Front Airbag Sensor LH Circuit Malfunction linked to the B1149 code in a Lexus?
- Ensure the vehicle's battery is disconnected before working on the airbag system to prevent accidental deployment. It is also recommended to follow proper safety procedures outlined in the vehicle's service manual.
9. How long does it typically take to repair the Front Airbag Sensor LH Circuit Malfunction causing the B1149 code in a Lexus?
- The repair time can vary based on the complexity of the issue and the availability of parts. Simple repairs may take a few hours, while more involved repairs could require a day or more to complete.
10. Can a DIY enthusiast with limited experience in automotive repair tackle the Front Airbag Sensor LH Circuit Malfunction related to the B1149 code in a Lexus?
- Due to the critical nature of the airbag system and the potential safety risks involved, it is advisable for individuals with limited experience to consult a professional mechanic for diagnosis and repair of the Front Airbag Sensor LH Circuit Malfunction in a Lexus.
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