B1139 Nissan Code - Diagnosis Sensor Unit
Quick Answer
The Air Bag Diagnosis Sensor Unit detects the whole SRS electrical system and displays the malfunction either by illuminating or blinking the air bag warning lamp in the combination meter. Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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
- B1139 Nissan indicates Diagnosis Sensor Unit.
- Common causes
- Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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 B1139 Nissan Description
The Air Bag Diagnosis Sensor Unit contains the “G†sensors for both frontal and side collisions and spare battery function in case of main battery damaged in a collision.
What are the Possible Causes of the DTC B1139 Nissan?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1139 Nissan?
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 B1139 Nissan 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 B1139 Nissan Code
1. What are common symptoms of OBDII code B1139 on a Nissan related to the Diagnosis Sensor Unit?
- Common symptoms include issues with the airbag system, such as the airbag warning light staying on or flashing.
2. What are the possible causes of OBDII code B1139 related to the Diagnosis Sensor Unit in a Nissan?
- The code B1139 can be triggered by a faulty Diagnosis Sensor Unit or issues with the wiring in the airbag system.
3. How can I diagnose the Diagnosis Sensor Unit issue causing OBDII code B1139 in my Nissan?
- Diagnosing the issue may require using a professional OBDII scanner to read the specific fault codes and pinpoint the problem within the airbag system.
4. Can I repair OBDII code B1139 related to the Diagnosis Sensor Unit in my Nissan on my own?
- Repairing the Diagnosis Sensor Unit issue typically requires specialized tools and knowledge, so it's recommended to seek help from a qualified mechanic.
5. Is it safe to drive my Nissan with OBDII code B1139 related to the Diagnosis Sensor Unit?
- It's not recommended to drive the vehicle with a malfunctioning airbag system, as it may compromise your safety in the event of a collision.
6. How much does it cost to repair OBDII code B1139 related to the Diagnosis Sensor Unit in a Nissan?
- The cost of repair can vary depending on the extent of the issue, but it's important to address the problem promptly to ensure the airbag system functions correctly.
7. Can resetting the OBDII code B1139 related to the Diagnosis Sensor Unit in my Nissan fix the issue?
- Resetting the code may temporarily turn off the warning light, but it won't fix the underlying problem with the Diagnosis Sensor Unit.
8. Are there any maintenance tips to prevent OBDII code B1139 related to the Diagnosis Sensor Unit in my Nissan?
- Regularly inspecting and maintaining the airbag system, including checking for loose connections or damaged wiring, can help prevent issues with the Diagnosis Sensor Unit.
9. How long does it take to repair the Diagnosis Sensor Unit issue causing OBDII code B1139 in a Nissan?
- The repair time can vary depending on the complexity of the problem, but it's best to consult with a professional mechanic for an accurate estimate.
10. Can OBDII code B1139 related to the Diagnosis Sensor Unit affect other systems in my Nissan?
- While the code specifically relates to the Diagnosis Sensor Unit in the airbag system, it's essential to address the issue promptly to prevent any potential safety risks or further damage to other components.
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