B1905 Lexus 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 Lexus 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.
Code B1905 Lexus Description
What are the Possible Causes of the DTC B1905 Lexus?
- 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 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 B1905 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.
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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 B1905 Lexus Code
1. What are the common symptoms of OBDII code B1905 in a Lexus related to a short in the front pretensioner squib left circuit?
- The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.
2. What causes the OBDII code B1905 in a Lexus indicating a short in the front pretensioner squib left circuit?
- This code is typically caused by a short circuit in the wiring of the front pretensioner squib left circuit or a fault in the pretensioner itself.
3. How serious is the OBDII code B1905 related to a front pretensioner squib left circuit short in a Lexus?
- This code is related to the safety systems of the vehicle, specifically the airbag system, so it is considered a serious issue that should be addressed promptly.
4. Can I continue driving my Lexus with the OBDII code B1905 present?
- It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the airbag system, which is crucial for passenger safety.
5. How can I diagnose and repair the OBDII code B1905 in my Lexus with a front pretensioner squib left circuit short?
- Diagnosing and repairing this code usually involves inspecting the wiring and connections of the front pretensioner squib left circuit, repairing any shorts, and replacing any faulty components.
6. Is it possible to reset the OBDII code B1905 in a Lexus without fixing the underlying issue?
- While you can clear the code using an OBDII scanner, it will likely reappear until the underlying issue with the front pretensioner squib left circuit short is resolved.
7. Are there any safety precautions to take when working on the front pretensioner squib left circuit in a Lexus?
- When working on the airbag system, it is important to disconnect the vehicle's battery and wait at least 10 minutes before starting any repairs to prevent accidental airbag deployment.
8. Can a DIY enthusiast with basic automotive skills fix the OBDII code B1905 in a Lexus?
- While some DIY enthusiasts may have the skills to diagnose and repair this issue, working on the airbag system can be complex and potentially dangerous, so it is recommended to seek professional help.
9. How much does it typically cost to repair the OBDII code B1905 related to a front pretensioner squib left circuit short in a Lexus?
- The cost of repairing this code can vary depending on the extent of the damage and whether any components need to be replaced, but it can range from a few hundred to over a thousand dollars.
10. Will fixing the OBDII code B1905 in my Lexus require a visit to the dealership or can it be done by an independent mechanic?
- An independent mechanic with experience in airbag systems should be able to diagnose and repair the issue, but for some specialized repairs or part replacements, a dealership may be necessary.
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