B1142 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
- B1142 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 B1142 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 B1142 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 B1142 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 B1142 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 B1142 Nissan Code
1. What are the common symptoms of OBDII code B1142 on a Nissan related to the Diagnosis Sensor Unit?
The common symptoms include airbag warning light illuminated on the dashboard and potential issues with the airbag system.
2. What are the possible causes of OBDII code B1142 related to the Diagnosis Sensor Unit in a Nissan?
The code B1142 can be triggered by a faulty Diagnosis Sensor Unit, damaged wiring harness, or poor electrical connections.
3. How can I diagnose the OBDII code B1142 in my Nissan related to the Diagnosis Sensor Unit?
Diagnosing OBDII code B1142 typically involves using a scan tool to retrieve the specific fault code, inspecting the Diagnosis Sensor Unit, checking the wiring for any damage, and ensuring all connections are secure.
4. Can I drive my Nissan with OBDII code B1142 related to the Diagnosis Sensor Unit?
It is not recommended to drive the vehicle with an active B1142 code, as it indicates a potential issue with the airbag system, which is crucial for safety in the event of a collision.
5. How can I reset the OBDII code B1142 in my Nissan after repairing the Diagnosis Sensor Unit issue?
Once the Diagnosis Sensor Unit issue has been addressed, the OBDII code B1142 can be reset using an OBDII scan tool capable of clearing fault codes.
6. Are there any DIY repair tips for fixing OBDII code B1142 related to the Diagnosis Sensor Unit in a Nissan?
DIY repair tips may include checking and cleaning the electrical connections, inspecting the wiring for any visible damage, and ensuring the Diagnosis Sensor Unit is securely in place.
7. How much does it typically cost to repair OBDII code B1142 related to the Diagnosis Sensor Unit in a Nissan?
The cost of repairing OBDII code B1142 can vary depending on the root cause of the issue, but it may involve replacing the Diagnosis Sensor Unit, repairing damaged wiring, or addressing any other underlying problems.
8. Are there any safety precautions to consider when working on the Diagnosis Sensor Unit related to OBDII code B1142 in a Nissan?
When working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for a specified period to discharge any stored energy to prevent accidental deployment of the airbags.
9. Can OBDII code B1142 related to the Diagnosis Sensor Unit affect the overall safety of my Nissan?
Yes, OBDII code B1142 indicates a fault in the airbag system, which can compromise the effectiveness of the airbags in the event of a collision, impacting overall safety.
10. Is it recommended to seek professional help for diagnosing and repairing OBDII code B1142 related to the Diagnosis Sensor Unit in a Nissan?
It is advisable to consult a certified mechanic or dealership with experience in airbag systems to accurately diagnose and repair OBDII code B1142 to ensure the safety and proper functioning of the airbag system.
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