B1142 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
- B1142 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.
Code B1142 Lexus Description
What are the Possible Causes of the DTC B1142 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 B1142 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 B1142 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.
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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.
Frequently Asked Questions about B1142 Lexus Code
1. What are the common symptoms of OBDII code B1142 in a Lexus related to the door side airbag sensor malfunction?
- Common symptoms may include the airbag warning light illuminating on the dashboard and a diagnostic trouble code (DTC) B1142 being stored in the vehicle's computer.
2. What are some possible causes of the OBDII code B1142 in a Lexus indicating a door side airbag sensor malfunction?
- Possible causes include a faulty door side airbag sensor, damaged wiring or connectors in the airbag system, or a problem with the airbag control module.
3. How can I diagnose the OBDII code B1142 in my Lexus to confirm a door side airbag sensor malfunction?
- A thorough diagnosis involves using a professional OBDII scanner to retrieve the specific DTC B1142, inspecting the door side airbag sensor and its connections, and testing the wiring for continuity and proper voltage.
4. Can I still drive my Lexus with the OBDII code B1142 related to a door side airbag sensor malfunction?
- It is not recommended to drive the vehicle with an active airbag fault code, as it indicates a potential safety concern with the airbag system's ability to deploy in an accident.
5. What is the typical repair process for fixing the OBDII code B1142 in a Lexus caused by a door side airbag sensor malfunction?
- The repair process usually involves replacing the faulty door side airbag sensor, repairing any damaged wiring or connectors, and clearing the DTC B1142 from the vehicle's computer.
6. Are there any safety precautions to consider when working on the airbag system to address the OBDII code B1142 in a Lexus?
- It is crucial to disconnect the vehicle's battery and wait for at least 10 minutes before working on the airbag system to prevent accidental airbag deployment.
7. Can I reset the OBDII code B1142 related to a door side airbag sensor malfunction in my Lexus without fixing the underlying issue?
- While you can clear the code temporarily, the underlying problem should be addressed to ensure the proper functioning of the airbag system and overall vehicle safety.
8. How much does it typically cost to repair the OBDII code B1142 in a Lexus due to a door side airbag sensor malfunction?
- Repair costs can vary depending on the extent of the issue, but replacing a door side airbag sensor and addressing related wiring problems may range from a few hundred to a thousand dollars.
9. Is it possible to prevent the OBDII code B1142 related to a door side airbag sensor malfunction in my Lexus?
- Regular maintenance, including checking the airbag system during scheduled services, can help prevent issues like the door side airbag sensor malfunction that triggers the B1142 code.
10. Can a DIY enthusiast with automotive knowledge tackle the repair of the OBDII code B1142 in a Lexus caused by a door side airbag sensor malfunction?
- While some DIYers may have the skills to diagnose and replace the door side airbag sensor, working on the airbag system requires caution and expertise due to safety considerations, so professional assistance is often recommended.
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