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B0133 Lexus Code - Short To Battery Right Seat Belt Pretensioner Squib Circuit

Quick Answer

The B0133 diagnostic trouble code for Lexus vehicles indicates a "Short To Battery Right Seat Belt Pretensioner Squib Circuit" issue. Common causes include Short circuit in the wiring harness connected to the right seat belt pretensioner, Faulty seat belt pretensioner squib, Corrosion or damage to the connectors in the circuit. 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
B0133 Lexus indicates Short To Battery Right Seat Belt Pretensioner Squib Circuit.
Common causes
Common causes include Short circuit in the wiring harness connected to the right seat belt pretensioner, Faulty seat belt pretensioner squib, Corrosion or damage to the connectors in the circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 27, 2024
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Code B0133 Lexus Description

The B0133 diagnostic trouble code for Lexus vehicles indicates a "Short To Battery Right Seat Belt Pretensioner Squib Circuit" issue. This means that there is a problem with the circuit that controls the right seat belt pretensioner, which is a safety feature designed to tighten the seat belt in the event of a collision to reduce the risk of injury to the occupant. The pretensioner squib is a pyrotechnic device that activates during a crash to retract the seat belt and secure the occupant in place.

OBDII Code B0133 Lexus - Short To Battery Right Seat Belt Pretensioner Squib Circuit
B0133 Lexus Code - Short To Battery Right Seat Belt Pretensioner Squib Circuit

Common Causes of B0133 Lexus

  1. Short circuit in the wiring harness connected to the right seat belt pretensioner
  2. Faulty seat belt pretensioner squib
  3. Corrosion or damage to the connectors in the circuit
  4. Impact or collision that damaged the seat belt pretensioner system
  5. Electrical issues in the vehicle's wiring system

Symptoms of B0133 Lexus

  1. Illumination of the airbag warning light on the dashboard
  2. Inability to retract or tighten the right seat belt properly
  3. Malfunctioning airbag system
  4. Audible warning chime indicating a safety system issue

How to Fix B0133 Lexus

  1. Begin by diagnosing the specific cause of the short to battery in the right seat belt pretensioner squib circuit using a diagnostic scanner.
  2. Inspect the wiring harness, connectors, and components of the seat belt pretensioner system for any visible damage or corrosion.
  3. Repair or replace any damaged wiring, connectors, or components in the circuit.
  4. Clear the diagnostic trouble codes from the vehicle's system and perform a test to ensure the issue has been resolved.
  5. If the problem persists, further troubleshooting may be required, potentially involving more in-depth electrical testing or component replacement.

Cost to Fix B0133 Lexus

The typical repair costs for addressing a B0133 code related to a short to battery in the right seat belt pretensioner squib circuit can vary depending on the extent of the damage and the specific components that need to be repaired or replaced. In general, the cost of parts for this repair could range from $100 to $300, while labor costs may range from $150 to $400. However, it is essential to note that labor rates at auto repair shops can vary widely based on location, vehicle make and model, and other factors. It is advisable to check with local auto repair shops for a more accurate estimate based on the specific circumstances of the vehicle in question.

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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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0133 Lexus Code

1. What are the common symptoms of OBDII code B0133 in a Lexus related to the right seat belt pretensioner squib circuit?

The common symptoms include illuminated airbag warning light on the dashboard and possible non-deployment of the right seat belt pretensioner in the event of a collision.

2. What are some possible causes of OBDII code B0133 indicating a short to battery in the right seat belt pretensioner squib circuit of a Lexus?

Potential causes may include damaged wiring or connectors in the circuit, a faulty seat belt pretensioner squib, or a malfunctioning airbag control module.

3. How can I diagnose the issue related to OBDII code B0133 in my Lexus right seat belt pretensioner squib circuit?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the wiring and connectors for any visible damage, and testing the components in the circuit for proper functionality.

4. Is it safe to continue driving my Lexus with OBDII code B0133 triggered for the right seat belt pretensioner squib circuit?

It is not recommended to drive the vehicle with an active airbag-related fault code, as it may compromise the effectiveness of the seat belt pretensioner in the event of an accident.

5. Can I repair OBDII code B0133 in my Lexus related to the right seat belt pretensioner squib circuit myself?

While some basic troubleshooting steps can be taken, repairing the issue typically requires specialized knowledge and tools. It is advisable to seek assistance from a qualified mechanic or dealership.

6. How much does it cost to fix OBDII code B0133 indicating a short to battery in the right seat belt pretensioner squib circuit of a Lexus?

The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic fees. It is recommended to obtain quotes from different service providers.

7. Are there any recalls or technical service bulletins related to OBDII code B0133 in Lexus vehicles?

It is advisable to check with Lexus dealerships or visit the official Lexus website to inquire about any recalls or technical service bulletins specific to this OBDII code and related components.

8. Can a faulty battery or alternator cause OBDII code B0133 to appear in a Lexus right seat belt pretensioner squib circuit?

While rare, electrical issues stemming from a faulty battery or alternator could potentially impact the functionality of the airbag system and trigger the B0133 trouble code. It's important to address any underlying electrical problems.

9. Will disconnecting the battery reset OBDII code B0133 in a Lexus with a short to battery in the right seat belt pretensioner squib circuit?

Disconnecting the battery may temporarily clear the trouble code, but it will not resolve the underlying issue causing the fault. It is recommended to diagnose and repair the problem to ensure the safety systems function properly.

10. How long does it typically take to repair OBDII code B0133 related to the right seat belt pretensioner squib circuit in a Lexus?

The repair time can vary depending on the complexity of the issue and the availability of parts. In some cases, it may be a quick fix, while other situations could require more extensive troubleshooting and repair work.

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