B1908 Lexus Code - Short to Positive 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
- B1908 Lexus indicates Short to Positive 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 B1908 Lexus Description
What are the Possible Causes of the DTC B1908 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 B1908 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 B1908 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 B1908 Lexus Code
1. What does the OBDII code B1908 for a Lexus indicate?
The code B1908 signifies a Short to Positive in the Front Pretensioner Squib Left Circuit in a Lexus vehicle.
2. What are common symptoms of the B1908 OBDII code in a Lexus?
Common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the left front airbag in the event of a collision.
3. What could cause the B1908 code to trigger in a Lexus?
The B1908 code is typically triggered by a short to positive in the front pretensioner squib left circuit, which may be caused by a faulty wiring harness, a loose connection, or a damaged pretensioner squib.
4. How can I diagnose the B1908 code in my Lexus?
Diagnosing the B1908 code usually involves inspecting the wiring harness and connections in the left front pretensioner squib circuit, checking for any visible damage, and using a multimeter to test for continuity and shorts.
5. Is it safe to drive my Lexus with the B1908 code present?
It is not recommended to drive the vehicle with the B1908 code active, as it may indicate a potential issue with the left front airbag system, compromising safety in the event of a collision.
6. Can I reset the B1908 code in my Lexus without fixing the underlying issue?
While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to ensure the proper functioning of the left front airbag system.
7. How can I repair the B1908 code in my Lexus?
Repairing the B1908 code typically involves repairing or replacing the wiring harness, fixing any loose connections, or replacing the damaged pretensioner squib in the left front airbag system.
8. Can I fix the B1908 code in my Lexus on my own?
Depending on your experience and comfort level with automotive repairs, you may be able to address the B1908 code on your own by following a repair manual or seeking guidance from a professional mechanic.
9. Are there any safety precautions I should take when working on the B1908 code in my Lexus?
When working on the airbag system to address the B1908 code, always disconnect the vehicle's battery, wait for the capacitors to discharge, and follow proper safety procedures to avoid accidental airbag deployment.
10. How much does it cost to fix the B1908 code in a Lexus?
The cost of repairing the B1908 code in a Lexus can vary depending on the extent of the damage, the parts needed for replacement, and whether you choose to do the repairs yourself or seek assistance from a professional mechanic.
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