B1125 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
- B1125 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 B1125 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 B1125 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 B1125 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 B1125 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 B1125 Nissan Code
1. What are the common symptoms of OBDII code B1125 for the Diagnosis Sensor Unit in a Nissan?
- Common symptoms include issues with the airbag system, such as the airbag warning light staying illuminated on the dashboard.
2. What can cause OBDII code B1125 to be triggered in a Nissan?
- The most common cause of B1125 is a malfunction or failure of the Diagnosis Sensor Unit itself.
3. How can I diagnose the Diagnosis Sensor Unit related to OBDII code B1125 in my Nissan?
- Diagnosis typically involves using a diagnostic scan tool to retrieve the specific trouble codes and performing a thorough inspection of the sensor unit for any visible damage.
4. Can a DIY enthusiast repair OBDII code B1125 related to the Diagnosis Sensor Unit in a Nissan?
- Repairing B1125 may require specialized knowledge and tools, so it is recommended to seek assistance from a qualified mechanic or dealership.
5. Are there any specific tips for repairing OBDII code B1125 in a Nissan?
- Ensure that the Diagnosis Sensor Unit is properly connected and secured, and check for any loose or damaged wiring harnesses that could be causing the issue.
6. How critical is it to address OBDII code B1125 in a Nissan promptly?
- Ignoring B1125 can affect the proper functioning of the airbag system, so it is crucial to address this issue promptly to ensure the safety of the vehicle occupants.
7. Can OBDII code B1125 for the Diagnosis Sensor Unit in a Nissan be intermittent?
- Yes, B1125 can sometimes be intermittent, but it is still essential to diagnose and repair the underlying issue to prevent any potential safety hazards.
8. Is resetting the OBDII code B1125 sufficient, or does it require a more in-depth repair?
- Simply clearing the code may temporarily turn off the warning light, but it will not fix the root cause of the issue. A proper diagnosis and repair are necessary.
9. Are there any recalls or service bulletins related to OBDII code B1125 in Nissan vehicles?
- It's recommended to check with Nissan or authorized dealerships for any recalls or service bulletins related to B1125 to see if your vehicle is covered under any existing campaigns.
10. Can a faulty Diagnosis Sensor Unit cause other OBDII codes to appear in a Nissan?
- A malfunctioning Diagnosis Sensor Unit can potentially trigger other related codes within the airbag system, so it's essential to address B1125 promptly to prevent further issues.
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