AutoCodes – Lexus – B1143 Lexus

B1143 Lexus Code - Door Side Airbag Sensor Malfunction

Quick Answer

The Door Side Airbag Sensor (Right Side) circuit consists of the airbag sensor assembly and Door Side Airbag Sensor (Right Side). Common causes include Faulty Door Side Airbag Sensor (Right Side), Door Side Airbag Sensor (Right Side) harness is open or shorted, Door Side Airbag Sensor (Right Side) 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: B1143 Lexus indicates Door Side Airbag Sensor Malfunction.
Common causes: Common causes include Faulty Door Side Airbag Sensor (Right Side), Door Side Airbag Sensor (Right Side) harness is open or shorted, Door Side Airbag Sensor (Right Side) 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 1,361

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 B1143 Lexus Description

The Door Side Airbag Sensor (Right Side) circuit consists of the airbag sensor assembly and Door Side Airbag Sensor (Right Side). The Diagnostic Trouble Code (DTC) B1143 is recorded when a malfunction is detected in the Door Side Airbag Sensor (Right Side) circuit.

OBDII Code B1143 Lexus - Door Side Airbag Sensor Malfunction - AutoCodes.com — B1143 Lexus Code - Door Side Airbag Sensor Malfunction

What does this mean?

What are the Possible Causes of the DTC B1143 Lexus?

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

How to Fix the DTC B1143 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 B1143 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 B1143 Lexus code?

Need more information on how to fix the B1143 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1143 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 B1143 Lexus Code

1. What are the common symptoms of OBDII code B1143 in a Lexus related to Door Side Airbag Sensor Malfunction?

The common symptoms of OBDII code B1143 in a Lexus include the airbag warning light illuminated on the dashboard and a potential fault in the side airbag system.

2. What are the possible causes of the Door Side Airbag Sensor Malfunction (code B1143) in a Lexus?

Possible causes of the Door Side Airbag Sensor Malfunction (code B1143) in a Lexus include a faulty side airbag sensor, damaged wiring, loose connections, or a malfunction in the airbag control module.

3. How can I diagnose the Door Side Airbag Sensor Malfunction (code B1143) in my Lexus?

To diagnose the Door Side Airbag Sensor Malfunction (code B1143) in your Lexus, you can use an OBDII scanner to retrieve the specific trouble code, visually inspect the side airbag sensors and wiring for damage, and perform a thorough system check using a diagnostic tool.

4. Can I continue driving my Lexus with the OBDII code B1143 related to a Door Side Airbag Sensor Malfunction?

It is not recommended to drive your Lexus with the OBDII code B1143 related to a Door Side Airbag Sensor Malfunction as it may affect the proper functioning of the side airbag system in the event of a collision.

5. How should I repair the Door Side Airbag Sensor Malfunction (code B1143) in my Lexus?

Repairing the Door Side Airbag Sensor Malfunction (code B1143) in your Lexus may involve replacing the faulty side airbag sensor, repairing damaged wiring or connections, or resetting the airbag control module after addressing the underlying issue.

6. Are there any safety concerns associated with the OBDII code B1143 related to Door Side Airbag Sensor Malfunction in a Lexus?

Yes, there are safety concerns associated with the OBDII code B1143 related to Door Side Airbag Sensor Malfunction in a Lexus, as it indicates a potential issue with the side airbag system, which is crucial for occupant protection in a crash.

7. How much does it cost to repair the OBDII code B1143 related to Door Side Airbag Sensor Malfunction in a Lexus?

The cost to repair the OBDII code B1143 related to Door Side Airbag Sensor Malfunction in a Lexus can vary depending on the specific issue, parts needed, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix the OBDII code B1143 related to Door Side Airbag Sensor Malfunction in a Lexus?

While some DIY enthusiasts may have the skills to diagnose and repair simple issues related to the OBDII code B1143 in a Lexus, it is recommended to consult with a professional mechanic or technician for complex airbag system repairs to ensure safety and proper functionality.

9. How often does the Door Side Airbag Sensor Malfunction (code B1143) occur in Lexus vehicles?

The Door Side Airbag Sensor Malfunction (code B1143) can occur in Lexus vehicles due to various factors such as sensor failures, wiring issues, or control module malfunctions. The frequency of occurrence may vary depending on the vehicle's age, maintenance history, and driving conditions.

10. Is it possible to prevent the OBDII code B1143 related to Door Side Airbag Sensor Malfunction in a Lexus?

While some causes of the OBDII code B1143 related to Door Side Airbag Sensor Malfunction may be unavoidable, regular inspection and maintenance of the airbag system can help detect potential issues early and prevent more severe malfunctions.