AutoCodes – Lexus – B1158 Lexus

B1158 Lexus Code - Front Airbag Sensor LH Malfunction

Quick Answer

The Front Airbag Sensor (Left Side) circuit consists of the Airbag Sensor Assembly and Front Airbag Sensor LH. Common causes include Faulty Front Airbag Sensor (Left Side), Front Airbag Sensor harness is open or shorted, Front Airbag Sensor 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: B1158 Lexus indicates Front Airbag Sensor LH Malfunction.
Common causes: Common causes include Faulty Front Airbag Sensor (Left Side), Front Airbag Sensor harness is open or shorted, Front Airbag Sensor 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.

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Code Popularity 1,918

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1158 Lexus Description

The Front Airbag Sensor (Left Side) circuit consists of the Airbag Sensor Assembly and Front Airbag Sensor LH. The Diagnostic Trouble Code (DTC) B1158 is recorded when a malfunction is detected in the Front Airbag Sensor LH circuit.

OBDII Code B1158 Lexus - Front Airbag Sensor LH Malfunction - AutoCodes.com — B1158 Lexus Code - Front Airbag Sensor LH Malfunction

What does this mean?

What are the Possible Causes of the DTC B1158 Lexus?

Faulty Front Airbag Sensor (Left Side)
Front Airbag Sensor harness is open or shorted
Front Airbag Sensor circuit poor electrical connection
Faulty Airbag Sensor Assembly

How to Fix the DTC B1158 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 B1158 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.

Need more information about the B1158 Lexus code?

Need more information on how to fix the B1158 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1158 Lexus code diagnosed by a professional: Find a repair shop in your area

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 B1158 Lexus Code

1. What are the common symptoms of OBDII code B1158 in a Lexus related to the Front Airbag Sensor LH Malfunction?

Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the front airbag system's functionality.

2. What can cause the Front Airbag Sensor LH Malfunction code B1158 in a Lexus?

Possible causes include a faulty front airbag sensor LH, damaged wiring or connectors, or issues with the airbag control module.

3. How serious is the OBDII code B1158 Front Airbag Sensor LH Malfunction in a Lexus?

This code indicates a problem with the front airbag sensor LH, which is a crucial component of the vehicle's safety system. It is important to address this issue promptly to ensure proper functioning of the airbag system in the event of a collision.

4. Can I still drive my Lexus with the B1158 code for Front Airbag Sensor LH Malfunction?

It is not recommended to drive the vehicle with the B1158 code present, as it indicates a malfunction in the front airbag sensor LH, which could affect the proper deployment of the airbag in the event of an accident.

5. How can I diagnose the Front Airbag Sensor LH Malfunction in my Lexus?

Diagnosing the issue typically involves using an OBDII scanner to retrieve the specific B1158 trouble code and then performing further testing on the front airbag sensor LH, wiring, and connectors to pinpoint the exact cause of the malfunction.

6. Can I repair the B1158 code for Front Airbag Sensor LH Malfunction in my Lexus myself?

Repairing the Front Airbag Sensor LH Malfunction code may require specialized tools and expertise. It is recommended to have the issue diagnosed and repaired by a qualified mechanic or at a Lexus dealership.

7. Are there any DIY tips for troubleshooting the B1158 code in a Lexus?

While basic troubleshooting steps like checking for loose connectors or damaged wiring can be performed by DIY enthusiasts, diagnosing and repairing the specific Front Airbag Sensor LH Malfunction code typically requires professional assistance.

8. How much does it cost to repair the B1158 code for Front Airbag Sensor LH Malfunction in a Lexus?

The cost of repairing the B1158 code can vary depending on the exact cause of the malfunction and the labor rates at the repair facility. It is advisable to obtain estimates from different mechanics or dealerships.

9. Can resetting the OBDII code B1158 Front Airbag Sensor LH Malfunction in a Lexus fix the issue?

Simply resetting the code may temporarily clear the warning light, but it will not address the underlying problem causing the Front Airbag Sensor LH Malfunction. It is important to diagnose and repair the issue to ensure the airbag system functions correctly.

10. How long does it take to repair the B1158 code for Front Airbag Sensor LH Malfunction in a Lexus?

The repair time for the B1158 code can vary based on the specific cause of the malfunction and the complexity of the repair. It is advisable to consult with a mechanic for an accurate estimate of the repair duration.