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B1153 Lexus Code - Seat Position Airbag Sensor Circuit Malfunction

Quick Answer

The B1153 diagnostic trouble code for Lexus vehicles indicates a seat position airbag sensor circuit malfunction. Common causes include Damaged wiring or connectors in the seat position sensor circuit, Faulty seat position sensor, Malfunctioning airbag control module. 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
B1153 Lexus indicates Seat Position Airbag Sensor Circuit Malfunction.
Common causes
Common causes include Damaged wiring or connectors in the seat position sensor circuit, Faulty seat position sensor, Malfunctioning airbag control module.
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 07, 2024
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Code B1153 Lexus Description

The B1153 diagnostic trouble code for Lexus vehicles indicates a seat position airbag sensor circuit malfunction. This means that there is an issue with the sensor that detects the position of the driver or passenger in the seat in relation to the airbag deployment system. The seat position sensor is a crucial component of the vehicle's safety system, as it helps determine the appropriate timing and force for airbag deployment in the event of a collision.

OBDII Code B1153 Lexus - Seat Position Airbag Sensor Circuit Malfunction
B1153 Lexus Code - Seat Position Airbag Sensor Circuit Malfunction

Common Causes of B1153 Lexus

  1. Damaged wiring or connectors in the seat position sensor circuit
  2. Faulty seat position sensor
  3. Malfunctioning airbag control module
  4. Corrosion or contamination in the sensor connections
  5. Impact or damage to the seat affecting sensor readings

Symptoms of B1153 Lexus

  1. Airbag warning light illuminated on the dashboard
  2. Inconsistent airbag deployment in testing
  3. Seatbelt warning light activated
  4. Seat position not adjusting properly
  5. Unusual noises coming from the seat area

How to Fix B1153 Lexus

  1. Diagnose the issue by using a diagnostic scanner to retrieve the specific fault code and pinpoint the exact cause of the malfunction.
  2. Inspect the wiring and connectors in the seat position sensor circuit for any damage or corrosion. Repair or replace any faulty components as needed.
  3. Test the seat position sensor and airbag control module for proper functionality. Replace any components that are not functioning correctly.
  4. Clear the fault code from the vehicle's system and reset the airbag module to ensure that the issue has been resolved.
  5. Perform a comprehensive test drive to verify that the seat position sensor is now operating correctly and that the airbags deploy as intended.

Cost to Fix B1153 Lexus

The typical repair costs for addressing a B1153 seat position airbag sensor circuit malfunction can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check with local auto repair shops to get a more accurate estimate for this repair.

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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 B1153 Lexus Code

1. What are common symptoms of OBDII code B1153 in a Lexus related to the seat position airbag sensor circuit malfunction?

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the proper deployment of the airbags in case of an accident.

2. What are the possible causes of the B1153 code in a Lexus indicating a seat position airbag sensor circuit malfunction?

Possible causes include a faulty seat position sensor, damaged wiring or connectors in the airbag system, or issues with the airbag control module.

3. How can I diagnose the seat position airbag sensor circuit malfunction in my Lexus triggering the B1153 code?

Diagnosis involves using an OBDII scanner to retrieve the specific B1153 code, inspecting the seat position sensor and related wiring for damage, and testing the airbag system components for proper functionality.

4. Can I continue driving my Lexus with the B1153 code related to the seat position airbag sensor circuit malfunction?

It is not recommended to drive the vehicle with an active airbag system fault code, as it can compromise the effectiveness of the airbags in case of an accident. Prompt diagnosis and repair are advised.

5. Is it possible to reset the B1153 code related to the seat position airbag sensor circuit malfunction in a Lexus without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily clear the warning light, and the issue will likely reoccur. It is essential to diagnose and repair the problem to ensure proper airbag functionality.

6. Are there any DIY repair tips for addressing the B1153 code in a Lexus due to a seat position airbag sensor circuit malfunction?

DIY repair tips may include checking and cleaning the seat position sensor connectors, inspecting and repairing damaged wiring, and resetting the airbag system after making necessary repairs.

7. How much does it typically cost to repair the B1153 code related to the seat position airbag sensor circuit malfunction in a Lexus?

The cost of repair can vary depending on the specific issue causing the code, labor rates, and the need for replacement parts. It is recommended to consult a professional mechanic for an accurate estimate.

8. Can a Lexus dealership service department help with diagnosing and repairing the B1153 code related to the seat position airbag sensor circuit malfunction?

Yes, Lexus dealership service departments have access to specialized tools, diagnostic equipment, and trained technicians who can effectively diagnose and repair issues related to the seat position airbag sensor circuit malfunction.

9. Are there any safety concerns associated with ignoring the B1153 code indicating a seat position airbag sensor circuit malfunction in a Lexus?

Ignoring the B1153 code can pose a safety risk as it may prevent the airbags from deploying correctly in the event of a collision, potentially leading to increased injury risk for vehicle occupants. It is crucial to address the issue promptly.

10. How long does it typically take to repair the B1153 code related to the seat position airbag sensor circuit malfunction in a Lexus?

The repair time can vary depending on the specific cause of the code and the extent of the necessary repairs. Simple fixes like connector cleaning may take less time, while more complex issues could require additional diagnostic and repair time.

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