B1140 Toyota Code - Side Airbag Sensor Assembly Malfunction
Quick Answer
The B1140 diagnostic trouble code for Toyota vehicles indicates a malfunction in the side airbag sensor assembly. Common causes include Electrical issues such as a faulty wiring connection or a short circuit, Physical damage to the side airbag sensor assembly due to a collision or impact, Corrosion or moisture damage to the sensor assembly. 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
- B1140 Toyota indicates Side Airbag Sensor Assembly Malfunction.
- Common causes
- Common causes include Electrical issues such as a faulty wiring connection or a short circuit, Physical damage to the side airbag sensor assembly due to a collision or impact, Corrosion or moisture damage to the sensor assembly.
- 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 B1140 Toyota Description
The B1140 diagnostic trouble code for Toyota vehicles indicates a malfunction in the side airbag sensor assembly. This component is responsible for detecting impacts or collisions on the side of the vehicle and triggering the deployment of the side airbags to protect the occupants. When this sensor assembly malfunctions, it can compromise the effectiveness of the side airbags in the event of a crash, potentially leading to serious injuries for the occupants.
Common Causes of B1140 Toyota
- Electrical issues such as a faulty wiring connection or a short circuit.
- Physical damage to the side airbag sensor assembly due to a collision or impact.
- Corrosion or moisture damage to the sensor assembly.
- Faulty sensor components or internal malfunction.
- Software or calibration issues with the sensor system.
Symptoms of B1140 Toyota
- Illumination of the airbag warning light on the dashboard.
- Inability to turn off the airbag warning light even after resetting it.
- Failure of the side airbags to deploy during a collision.
- False deployment of the side airbags without any impact.
How to Fix B1140 Toyota
- First, the technician will perform a thorough inspection of the side airbag sensor assembly to identify the exact cause of the malfunction.
- If the issue is related to wiring or electrical connections, they will repair or replace the damaged components as needed.
- In case of physical damage to the sensor assembly, it may need to be replaced entirely.
- The technician will also check for any corrosion or moisture damage and address it accordingly.
- Finally, the sensor system will be recalibrated and tested to ensure that it is functioning correctly.
Cost to Fix B1140 Toyota
The cost of repairing a B1140 code for a Toyota side airbag sensor assembly malfunction can vary depending on the extent of the damage and the specific components that need to be replaced. Generally, the cost of parts for a new sensor assembly can range from $200 to $500, while the labor cost for the repair can be between $150 to $300. Overall, the total repair cost for this issue can be estimated to be around $350 to $800. It's important to keep in mind that these are rough estimates, and actual repair costs may vary based on the location, vehicle make and model, and labor rates at the auto repair shop.
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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 B1140 Toyota Code
1. What are common symptoms of OBDII code B1140 Toyota (Side Airbag Sensor Assembly Malfunction)?
- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the side airbag system.
2. What causes the OBDII code B1140 Toyota to trigger?
- The code B1140 typically triggers due to a malfunction in the side airbag sensor assembly, which can be caused by wiring issues, sensor failure, or impact damage.
3. How can I diagnose the OBDII code B1140 Toyota at home?
- While diagnosing this code may require specialized tools, you can start by checking the side airbag sensor connectors for any visible damage or loose connections.
4. Can I still drive my Toyota with the OBDII code B1140?
- It is not recommended to drive the vehicle with the airbag warning light on, as it indicates a potential safety issue with the side airbag system. Have the issue diagnosed and repaired as soon as possible.
5. How much does it cost to repair the OBDII code B1140 Toyota?
- The cost of repair can vary depending on the exact cause of the malfunction. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.
6. Are there any safety concerns associated with the OBDII code B1140 Toyota?
- Yes, the code B1140 indicates a malfunction in the side airbag sensor assembly, which can affect the proper deployment of the side airbags in the event of a collision. It is important to address this issue promptly.
7. Can I reset the OBDII code B1140 Toyota on my own?
- While you can try resetting the code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.
8. Is the OBDII code B1140 Toyota a common issue with certain Toyota models?
- The code B1140 may be more common in certain Toyota models that have been known to experience issues with the side airbag sensor assembly. Check with your dealership for any related recalls or service bulletins.
9. How long does it typically take to repair the OBDII code B1140 Toyota?
- The repair time can vary depending on the exact cause of the issue and the availability of parts. It is best to consult with a professional mechanic for a more accurate time estimate.
10. Can I prevent the OBDII code B1140 Toyota from occurring in the future?
- Regular maintenance and inspection of the side airbag system can help prevent issues that may trigger the code B1140. Addressing any wiring or sensor issues promptly can also help prevent future malfunctions.
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