B1139 Nissan : Diagnosis Sensor Unit
If you own a Nissan and have been experiencing issues with the airbag system, you may have come across the B1139 code. This code indicates a problem with the diagnosis sensor unit, which is responsible for detecting any malfunctions in the airbag system. In this article, we will discuss what the B1139 code means and how to fix it. So, let’s get started.
Most models of Nissan cars will work with the fixes we will discuss for the B1139 code.
When the B1139 code appears on your Nissan’s diagnostic system, it means that there is an issue with the diagnosis sensor unit. This unit is responsible for monitoring various systems in your car and sending data to the engine control module. If the diagnosis sensor unit is malfunctioning, it can cause a range of problems, including reduced engine performance, poor fuel economy, and even stalling.
To fix the B1139 code, you will need to diagnose the specific issue with the diagnosis sensor unit. This may involve checking the wiring and connections, replacing damaged components, or resetting the system. It is important to address this issue as soon as possible to prevent further damage to your car and ensure that it runs smoothly and efficiently.
Key Takeaways: B1139 Code Nissan
Meaning: The B1139 code in Nissan vehicles indicates a malfunction in the diagnosis sensor unit.
Causes: The code can be triggered by a faulty sensor unit, damaged wiring, or a malfunctioning control module.
Symptoms: Symptoms of the B1139 code include the airbag warning light staying on, the horn not working, and the cruise control not functioning properly.
Fixes: To fix the issue, the diagnosis sensor unit may need to be replaced, and any damaged wiring should be repaired. The control module may also need to be reprogrammed or replaced.
B1139 Code Nissan:
The B1139 code in Nissan vehicles refers to a problem with the diagnosis sensor unit. This unit is responsible for monitoring various systems in the vehicle and reporting any issues to the engine control module (ECM). When the ECM detects a problem with the diagnosis sensor unit, it will trigger the B1139 code and turn on the check engine light.
There are several potential causes of the B1139 code, including a faulty diagnosis sensor unit, damaged wiring or connectors, or a problem with the ECM itself. To diagnose the issue, a mechanic will typically use a scan tool to read the code and perform a visual inspection of the sensor unit and related components.
Once the problem has been identified, the mechanic will need to repair or replace the faulty component. This may involve replacing the diagnosis sensor unit, repairing damaged wiring or connectors, or replacing the ECM if it is found to be the root cause of the problem.
What are the Signs or Symptoms of the B1139 Code in Nissan?
The B1139 code in Nissan is related to the diagnosis sensor unit. This code indicates that there is a problem with the sensor unit, which is responsible for monitoring various systems in the vehicle. Here are some of the signs and symptoms that you may experience if your Nissan has the B1139 code:
- Malfunction indicator lamp (MIL) is on: The MIL, also known as the check engine light, will illuminate on the dashboard when there is a problem with the vehicle’s systems. If the B1139 code is present, the MIL will turn on.
- Loss of power: If the diagnosis sensor unit is not functioning properly, it may cause a loss of power in the vehicle. You may notice that the engine is not running as smoothly as it should, or that the acceleration is sluggish.
- Difficulty starting the engine: A faulty diagnosis sensor unit can also make it difficult to start the engine. You may need to turn the key multiple times before the engine starts, or it may not start at all.
- Erratic behavior of the vehicle: The diagnosis sensor unit is responsible for monitoring various systems in the vehicle, including the engine, transmission, and emissions. If it is not functioning properly, you may notice erratic behavior in the vehicle, such as stalling, hesitation, or rough idling.
- Other codes present: The B1139 code may be accompanied by other codes related to the diagnosis sensor unit or other systems in the vehicle. These codes can provide additional information about the specific problem that is causing the B1139 code.
If you experience any of these symptoms, it is important to have your Nissan diagnosed by a qualified mechanic. They will be able to determine the exact cause of the B1139 code and recommend the appropriate repairs. Ignoring this code can lead to further damage to your vehicle and potentially costly repairs down the line.
Possible Causes of B1139 Code in Nissan
The B1139 code in Nissan indicates a problem with the diagnosis sensor unit. This code is usually triggered when the sensor unit fails to communicate with the engine control module (ECM). There are several possible causes of this code, including:
- Malfunctioning Diagnosis Sensor Unit: The most common cause of the B1139 code is a malfunctioning diagnosis sensor unit. This unit is responsible for monitoring various systems in the vehicle and sending data to the ECM. If the sensor unit fails, it can cause communication issues with the ECM and trigger the B1139 code.
- Wiring Issues: Another possible cause of the B1139 code is wiring issues. If there is a problem with the wiring between the diagnosis sensor unit and the ECM, it can cause communication problems and trigger the code. This can be caused by damaged or corroded wiring, loose connections, or other issues.
- ECM Malfunction: In some cases, the B1139 code may be caused by a malfunctioning ECM. If the ECM is not receiving data from the diagnosis sensor unit, it may not be able to properly control various systems in the vehicle. This can cause a range of issues, including poor performance and reduced fuel efficiency.
- Other Electrical Issues: There are a variety of other electrical issues that can cause the B1139 code. These may include problems with other sensors or components in the vehicle, as well as issues with the battery or alternator.
If you are experiencing the B1139 code in your Nissan, it is important to have the issue diagnosed and repaired as soon as possible. Ignoring the code can lead to further damage to your vehicle and potentially costly repairs down the line. A qualified mechanic can diagnose the issue and recommend the best course of action to get your vehicle back on the road.
Fixes for B1139 Code in Nissan Vehicles
The B1139 code in Nissan vehicles indicates a problem with the diagnosis sensor unit. This code can be triggered due to various reasons, including a faulty sensor, damaged wiring, or a malfunctioning control module. Here are some of the fixes that can help resolve the B1139 code in Nissan vehicles:
- Check the wiring: The first step in fixing the B1139 code is to check the wiring for any damage or loose connections. If any issues are found, they should be repaired or replaced as necessary.
- Replace the diagnosis sensor unit: If the wiring is in good condition, the next step is to replace the diagnosis sensor unit. This is a common fix for the B1139 code, and it usually resolves the issue.
- Replace the control module: If the diagnosis sensor unit replacement does not fix the issue, the control module may be the culprit. In this case, the control module should be replaced to resolve the B1139 code.
- Reset the code: After any repairs or replacements are made, the B1139 code should be reset using an OBD-II scanner. This will clear the code from the vehicle’s memory and allow for proper diagnosis of any remaining issues.
- Seek professional help: If the above fixes do not resolve the B1139 code, it is recommended to seek professional help from a certified mechanic or dealership. They will have the necessary tools and expertise to diagnose and fix the issue.
In conclusion, the B1139 code in Nissan vehicles can be caused by various issues, including a faulty diagnosis sensor unit, damaged wiring, or a malfunctioning control module. The fixes for this code include checking the wiring, replacing the diagnosis sensor unit or control module, resetting the code, and seeking professional help if necessary. It is important to address the B1139 code promptly to ensure the safety and reliability of the vehicle.
How Much Will It Cost to Fix the B1139 Code on a Nissan?
The B1139 code on a Nissan indicates a problem with the diagnosis sensor unit. This can cause issues with the airbag system, as the sensor unit is responsible for detecting crashes and deploying the airbags if necessary.
The cost to fix the B1139 code on a Nissan can vary depending on the severity of the issue. In some cases, it may be a simple matter of replacing a faulty sensor or resetting the system. This could cost anywhere from $100 to $500.
However, if the problem is more complex and requires extensive repairs or replacement of the airbag system, the cost could be much higher. In some cases, it may even be more cost-effective to replace the entire vehicle rather than attempting to fix the issue.
If you are experiencing issues with the B1139 code on your Nissan, it is important to have it diagnosed and repaired as soon as possible to ensure the safety of you and your passengers. Contact a trusted mechanic or dealership for an accurate estimate of the cost to fix the issue.
Possible Causes and Fixes of Code B1139 Nissan
| Possible Cause | Fix | Cost to Fix |
|---|---|---|
| Malfunctioning Diagnosis Sensor Unit | Replace the Diagnosis Sensor Unit | $200-$500 |
| Wiring Issues | Repair or replace damaged wiring | $100-$300 |
| Loose or Corroded Connections | Clean or tighten connections | $50-$100 |
| Faulty Control Module | Replace the Control Module | $300-$800 |
How Serious is the B1139 Code on a Nissan?
The B1139 code on a Nissan indicates a problem with the diagnosis sensor unit. This unit is responsible for monitoring various systems in the vehicle and reporting any issues to the engine control module (ECM).
While the code itself may not cause any immediate issues with the vehicle’s performance, it is important to address the underlying problem as soon as possible. Ignoring the code could lead to further damage to the vehicle and potentially more expensive repairs down the line.
It is recommended to have a certified mechanic diagnose and repair the issue causing the B1139 code to ensure proper and safe operation of the vehicle.
Can You Still Drive with the B1139 Code on Your Nissan?
If your Nissan is showing the B1139 code, it means that there is an issue with the diagnosis sensor unit. While it is possible to still drive with this code, it is not recommended. The diagnosis sensor unit is responsible for monitoring various systems in your vehicle, including the airbag system. If this unit is not functioning properly, it could lead to serious safety issues in the event of an accident.
It is best to have your Nissan inspected by a qualified mechanic as soon as possible to determine the cause of the B1139 code and make any necessary repairs. Continuing to drive with this code could potentially put you and your passengers at risk.
Conclusion
Overall, the B1139 code in Nissan vehicles can be caused by a variety of issues related to the diagnosis sensor unit. It is important to have the vehicle diagnosed by a professional to determine the exact cause of the code. Once the issue is identified, the appropriate repairs can be made to resolve the problem and clear the code. Ignoring the code can lead to further damage to the vehicle and potentially more expensive repairs down the line.
FAQ
What is B1139 code in Nissan?
B1139 is a diagnostic trouble code that indicates a malfunction in the sensor unit of the Nissan vehicle. It is related to the airbag system and can affect the deployment of the airbags in case of an accident.
What are the symptoms of B1139 code in Nissan?
The symptoms of B1139 code in Nissan may include the airbag warning light staying on, the airbags not deploying in case of an accident, and the vehicle failing to pass an emissions test.
What causes B1139 code in Nissan?
The B1139 code in Nissan is usually caused by a malfunction in the sensor unit, which can be due to a faulty sensor, damaged wiring, or a problem with the airbag control module.
How is B1139 code in Nissan diagnosed?
B1139 code in Nissan can be diagnosed using an OBD-II scanner, which will read the code and provide information about the specific problem. The technician may also perform a visual inspection of the sensor unit and wiring to check for any visible damage.
How is B1139 code in Nissan fixed?
The fix for B1139 code in Nissan will depend on the specific problem causing the code. It may involve replacing a faulty sensor, repairing damaged wiring, or replacing the airbag control module. It is recommended to have a certified technician diagnose and fix the problem to ensure proper repair and safety of the vehicle.
Learn about more B codes in Nissan here.
