B1157 Lexus Code - Front Airbag Sensor RH Malfunction
Quick Answer
The Front Airbag Sensor (Right Side) circuit consists of the Airbag Sensor Assembly and Front Airbag Sensor RH. Common causes include Faulty Front Airbag Sensor (Right 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
- B1157 Lexus indicates Front Airbag Sensor RH Malfunction.
- Common causes
- Common causes include Faulty Front Airbag Sensor (Right 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.
Code B1157 Lexus Description
What are the Possible Causes of the DTC B1157 Lexus?
- Faulty Front Airbag Sensor (Right 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 B1157 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 B1157 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 B1157 Lexus Code
1. What are the common symptoms of OBDII code B1157 in a Lexus, indicating a Front Airbag Sensor RH Malfunction?
The common symptoms include the airbag warning light illuminated on the dashboard and a diagnostic trouble code (DTC) B1157 stored in the vehicle's computer.
2. What are the possible causes of the Front Airbag Sensor RH Malfunction in a Lexus?
The most common causes of this issue are a faulty front airbag sensor on the right-hand side, damaged wiring or connectors leading to the sensor, or a problem with the airbag control module.
3. How can I diagnose the Front Airbag Sensor RH Malfunction in my Lexus?
Diagnosis typically involves using an OBDII scanner to retrieve the specific code (B1157), checking the wiring and connectors for any visible damage, and testing the front airbag sensor for proper functionality.
4. Can I continue driving my Lexus with the B1157 code related to the Front Airbag Sensor RH Malfunction?
It is not recommended to drive the vehicle with this issue unresolved, as the front airbag sensor plays a crucial role in the proper functioning of the airbag system in the event of a collision.
5. Is it possible to repair the Front Airbag Sensor RH Malfunction in a Lexus on my own?
While some DIY enthusiasts may attempt to replace the front airbag sensor or repair wiring themselves, it is recommended to seek professional assistance due to the critical nature of the airbag system.
6. How much does it typically cost to repair the Front Airbag Sensor RH Malfunction in a Lexus?
The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
7. Are there any preventive maintenance tips to avoid the Front Airbag Sensor RH Malfunction in my Lexus?
Regularly inspecting the airbag system components, ensuring proper wiring connections, and addressing any warning lights promptly can help prevent issues like the B1157 code.
8. Can a Front Airbag Sensor RH Malfunction be triggered by a recent collision or impact?
Yes, a collision or impact can potentially damage the front airbag sensor or related components, leading to the B1157 code and requiring inspection and repair.
9. How long does it usually take to repair the Front Airbag Sensor RH Malfunction in a Lexus?
The repair time can vary depending on the extent of the issue and availability of parts, but it typically takes a few hours to a full day for a professional technician to diagnose and fix the problem.
10. Will resetting the OBDII code B1157 on my Lexus make the Front Airbag Sensor RH Malfunction disappear?
Resetting the code may temporarily clear the warning light, but if the underlying issue causing the malfunction is not addressed, the code is likely to reappear, and the problem will persist.
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