B1138 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
- B1138 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 B1138 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 B1138 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 B1138 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 B1138 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.
Need more information about the B1138 Nissan code?
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Need Help with the Code?
Get the B1138 Nissan code diagnosed by a professional: Find a repair shop in your area
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 B1138 Nissan Code
1. What does OBDII code B1138 for Nissan indicate?
The B1138 code specifically refers to a fault in the Diagnosis Sensor Unit in Nissan vehicles.
2. What are the common symptoms of a B1138 OBDII code in a Nissan car?
Common symptoms include the airbag warning light staying on, the horn not working, and potential issues with the vehicle's safety systems.
3. What are the possible causes of the B1138 OBDII code in a Nissan vehicle?
The B1138 code can be triggered by a faulty Diagnosis Sensor Unit, damaged wiring, or poor connections in the airbag system.
4. How can I diagnose the B1138 code in my Nissan car?
Diagnosis typically involves using a diagnostic scanner to retrieve the specific error code and then inspecting the Diagnosis Sensor Unit and related components for any visible damage.
5. Is it safe to drive with a B1138 OBDII code in my Nissan car?
It is not recommended to drive with an active B1138 code as it can affect the proper functioning of the airbag system, compromising safety in the event of an accident.
6. Can I repair the B1138 code in my Nissan vehicle myself?
While some basic troubleshooting like checking for loose connections can be done by DIY enthusiasts, diagnosing and repairing the Diagnosis Sensor Unit may require professional help.
7. What are some tips for repairing the B1138 OBDII code in a Nissan car?
Ensure all connections are secure, inspect wiring for damage, and consider seeking assistance from a qualified mechanic to accurately diagnose and fix the issue.
8. How much does it typically cost to repair the B1138 code in a Nissan vehicle?
The cost of repairs can vary depending on the exact cause of the issue, but it's advisable to budget for diagnostic fees and potential replacement parts if needed.
9. Can resetting the OBDII system clear the B1138 code in my Nissan car?
Resetting the system may temporarily clear the code, but if the underlying issue with the Diagnosis Sensor Unit persists, the code is likely to reappear.
10. Is it necessary to replace the Diagnosis Sensor Unit when dealing with the B1138 OBDII code in a Nissan vehicle?
If the Diagnosis Sensor Unit is confirmed to be faulty, replacement may be necessary to resolve the B1138 code and ensure the proper functioning of the airbag system.
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