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Engine-Codes – Lexus – B1159 Lexus

B1159 Lexus Code - Front Airbag Sensor LH Malfunction

Quick Answer

When the diagnostic code B1159 appears on a Lexus vehicle, it indicates a malfunction in the front airbag sensor located on the left-hand side of the vehicle. Common causes include Faulty wiring or connections in the airbag sensor circuit, Corrosion or damage to the sensor itself, Impact or collision that damaged the sensor. 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
B1159 Lexus indicates Front Airbag Sensor LH Malfunction.
Common causes
Common causes include Faulty wiring or connections in the airbag sensor circuit, Corrosion or damage to the sensor itself, Impact or collision that damaged the sensor.
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 Aug 30, 2024
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Code B1159 Lexus Description

When the diagnostic code B1159 appears on a Lexus vehicle, it indicates a malfunction in the front airbag sensor located on the left-hand side of the vehicle. This sensor plays a crucial role in detecting impacts and deploying the airbag to protect the driver in the event of a collision. A malfunction in this sensor can lead to the airbag not deploying properly or not deploying at all, compromising the safety of the driver and passengers.

OBDII Code B1159 Lexus - Front Airbag Sensor LH Malfunction
B1159 Lexus Code - Front Airbag Sensor LH Malfunction

Common Causes of B1159 Lexus

  1. Faulty wiring or connections in the airbag sensor circuit
  2. Corrosion or damage to the sensor itself
  3. Impact or collision that damaged the sensor
  4. Faulty airbag control module
  5. Software issues in the vehicle's electronic control unit (ECU)

Symptoms of B1159 Lexus

  1. Airbag warning light on the dashboard
  2. Inoperative airbag system
  3. Faulty or intermittent airbag deployment
  4. Issues with the vehicle's SRS (Supplemental Restraint System)
  5. Poor overall safety rating on crash tests

How to Fix B1159 Lexus

  1. Diagnose the specific cause of the malfunction using a diagnostic scanner
  2. Inspect the wiring and connections in the airbag sensor circuit for any damage or corrosion
  3. Replace the front airbag sensor LH if it is found to be faulty
  4. Reset the airbag system and clear the diagnostic trouble codes
  5. Test the airbag system to ensure proper functionality and safety

Cost to Fix B1159 Lexus

The cost of repairing a front airbag sensor LH malfunction on a Lexus can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of issue can range from $200 to $500, including parts and labor. It's important to note that additional costs may apply if other components of the airbag system need to be replaced or repaired. It's recommended to consult with a certified mechanic or dealership for an accurate estimate based on your vehicle's make and model.

Need more information about the B1159 Lexus code?

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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 B1159 Lexus Code

1. What are the common symptoms of OBDII code B1159 in a Lexus related to Front Airbag Sensor LH Malfunction?

- Common symptoms include the airbag warning light staying illuminated on the dashboard and potential issues with the front airbag system.

2. What are the possible causes of OBDII code B1159 in a Lexus indicating Front Airbag Sensor LH Malfunction?

- Possible causes include a faulty front airbag sensor LH, damaged wiring or connectors, or a malfunction in the airbag system.

3. How can I diagnose the Front Airbag Sensor LH Malfunction in my Lexus when OBDII code B1159 is triggered?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the front airbag sensor LH and its wiring for any visible damage, and conducting a thorough system check.

4. Is it safe to drive my Lexus with OBDII code B1159 signaling a Front Airbag Sensor LH Malfunction?

- It is not recommended to drive the vehicle with a potential airbag system malfunction, as it may compromise occupant safety in case of an accident.

5. Can I reset the OBDII code B1159 related to Front Airbag Sensor LH Malfunction in my Lexus without fixing the underlying issue?

- While you can clear the code temporarily, it is crucial to address the root cause of the malfunction to ensure the proper functioning of the airbag system.

6. What repair tips can help resolve OBDII code B1159 in a Lexus due to Front Airbag Sensor LH Malfunction?

- Repair tips may include checking and repairing damaged wiring, replacing the front airbag sensor LH if necessary, and ensuring all connections are secure.

7. How much does it typically cost to repair OBDII code B1159 in a Lexus caused by Front Airbag Sensor LH Malfunction?

- Repair costs can vary depending on the extent of the damage and whether any parts need replacement, but it is advisable to consult a professional for an accurate estimate.

8. Can a DIY enthusiast fix the Front Airbag Sensor LH Malfunction triggering OBDII code B1159 in a Lexus?

- While some individuals may have the skills to diagnose and repair the issue themselves, working on airbag systems can be complex and potentially dangerous, so professional assistance is recommended.

9. Are there any recalls or service bulletins related to OBDII code B1159 in Lexus models for Front Airbag Sensor LH Malfunction?

- It's advisable to check with Lexus dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any relevant recalls or service bulletins regarding this issue.

10. How can I prevent OBDII code B1159 from occurring in my Lexus due to Front Airbag Sensor LH Malfunction in the future?

- Regular maintenance and inspections of the airbag system, addressing any warning lights promptly, and following manufacturer's guidelines can help prevent such malfunctions.

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