B0138 Lexus Code - Short To Battery Left Seat Belt Pretensioner Squib Circuit
Quick Answer
The left seat belt pretensioner squib circuit consists of the air bag center sensor and right seat belt pretensioner. Common causes include Faulty Left Seat Belt Pretensioner, Left Seat Belt Pretensioner harness is open or shorted, Left Seat Belt Pretensioner 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
- B0138 Lexus indicates Short To Battery Left Seat Belt Pretensioner Squib Circuit.
- Common causes
- Common causes include Faulty Left Seat Belt Pretensioner, Left Seat Belt Pretensioner harness is open or shorted, Left Seat Belt Pretensioner 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 B0138 Lexus Description
What are the Possible Causes of the DTC B0138 Lexus?
- Faulty Left Seat Belt Pretensioner
- Left Seat Belt Pretensioner harness is open or shorted
- Left Seat Belt Pretensioner circuit poor electrical connection
- Faulty Air Bag Control Module
How to Fix the DTC B0138 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 B0138 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 B0138 Lexus Code
1. What are common symptoms of OBDII code B0138 in a Lexus related to the left seat belt pretensioner squib circuit?
The common symptoms include the airbag warning light illuminating on the dashboard and possible issues with the left seat belt pretensioner system.
2. What can cause the OBDII code B0138 in a Lexus indicating a short to battery in the left seat belt pretensioner squib circuit?
Possible causes include damaged wiring, a faulty seat belt pretensioner squib, or a poor electrical connection in the circuit.
3. How can I diagnose the OBDII code B0138 in my Lexus related to the left seat belt pretensioner squib circuit?
Diagnosis involves inspecting the wiring for any visible damage, testing the seat belt pretensioner squib for continuity, and checking the electrical connections for proper contact.
4. Is it safe to drive my Lexus with the OBDII code B0138 indicating a short to battery in the left seat belt pretensioner squib circuit?
It is not recommended to drive the vehicle with this code present, as it may affect the proper functioning of the seat belt pretensioner system in the event of a collision.
5. Can I reset the OBDII code B0138 in my Lexus after repairing the issue with the left seat belt pretensioner squib circuit?
Yes, once the underlying issue has been fixed, the code can be cleared using an OBDII scanner or by disconnecting the car battery for a few minutes.
6. How much does it typically cost to repair the OBDII code B0138 in a Lexus caused by a short to battery in the left seat belt pretensioner squib circuit?
The cost of repair can vary depending on the specific issue, but it may involve replacing the seat belt pretensioner squib or repairing damaged wiring, which can range from a few hundred to over a thousand dollars.
7. Are there any safety precautions to keep in mind when working on the left seat belt pretensioner squib circuit to resolve the OBDII code B0138 in a Lexus?
It is crucial to disconnect the car battery and wait for the system to fully discharge before attempting any repairs to avoid accidental airbag deployment.
8. Can a DIY enthusiast with basic automotive knowledge fix the OBDII code B0138 related to the left seat belt pretensioner squib circuit in a Lexus?
While some basic troubleshooting steps can be done by DIY enthusiasts, repairing the underlying issue may require specialized tools and expertise, so it is recommended to consult a professional mechanic.
9. Will the OBDII code B0138 in my Lexus reset itself after a certain number of driving cycles if the issue with the left seat belt pretensioner squib circuit is resolved?
In some cases, the code may clear itself after several successful drive cycles once the problem has been fixed, but it is advisable to use an OBDII scanner to clear the code manually.
10. How important is it to address the OBDII code B0138 indicating a short to battery in the left seat belt pretensioner squib circuit in a Lexus promptly?
It is crucial to address this code promptly to ensure the proper functioning of the seat belt pretensioner system, which plays a vital role in enhancing occupant safety during a collision.
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