B1149 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 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 Description
What are the Possible Causes of the DTC B1149?
- 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?
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 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.
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Information for Specific Makes
- B1149 Lexus — Front Airbag Sensor LH Circuit Malfunction
- B1149 Scion — Front Airbag Sensor LH Circuit Malfunction
- B1149 Toyota — Front Airbag Sensor LH Circuit Malfunction
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 Code
1. What are the common symptoms of OBDII code B1149 (Front Airbag Sensor LH Circuit Malfunction)?
- Common symptoms include the airbag warning light illuminating on the dashboard, the airbag system not deploying in a collision, and potential issues with the entire airbag system.
2. What are the possible causes of OBDII code B1149?
- The code can be triggered by a faulty front airbag sensor LH, damaged wiring or connectors in the circuit, a short circuit, or a problem with the airbag control module.
3. How serious is OBDII code B1149?
- This code indicates a malfunction in the front airbag sensor LH circuit, which can compromise the proper functioning of the airbag system. It is crucial to address this issue promptly to ensure the safety features of the vehicle are fully operational.
4. Can I drive my vehicle with OBDII code B1149?
- It is not recommended to drive the vehicle with this code present, as the airbag system may not deploy correctly in the event of a collision. It is advised to have the issue diagnosed and repaired before driving the vehicle.
5. How can I diagnose OBDII code B1149?
- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the fault codes, inspecting the front airbag sensor LH and its wiring, checking for any visible damage, and testing the airbag system for proper function.
6. What is the typical repair for OBDII code B1149?
- The repair for this code may involve replacing the front airbag sensor LH, repairing or replacing damaged wiring or connectors, addressing any short circuits, or reprogramming the airbag control module.
7. Can I reset OBDII code B1149 on my own?
- While you can clear the fault code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring. Clearing the code without fixing the problem will not resolve the issue.
8. How much does it cost to repair OBDII code B1149?
- The cost of repairing this code can vary depending on the specific cause of the malfunction, the cost of parts needed for the repair, and labor charges. It is advisable to consult a professional mechanic for an accurate estimate.
9. Are there any safety precautions to take when dealing with OBDII code B1149?
- When working on the airbag system or related components, it is essential to disconnect the vehicle's battery and wait for a few minutes before starting any repairs to prevent accidental deployment of the airbags.
10. Will OBDII code B1149 affect my vehicle's performance?
- While the code itself may not directly impact the performance of the vehicle, it can compromise the safety features related to the airbag system. It is crucial to address this code promptly to ensure the overall safety of the vehicle.
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