B1142 Infiniti 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 Infiniti 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 Infiniti 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 Infiniti?
- 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 Infiniti?
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 Infiniti 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 B1142 Infiniti code?
Need more information on how to fix the B1142 Infiniti code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1142 Infiniti 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 B1142 Infiniti Code
1. What does OBDII code B1142 mean for an Infiniti?
B1142 refers to an issue with the Diagnosis Sensor Unit, which is part of the airbag system and helps detect crashes to trigger airbag deployment.
2. What are the symptoms of code B1142 in an Infiniti?
Common symptoms include the airbag warning light staying illuminated and the airbag system potentially being disabled.
3. What causes the B1142 code in an Infiniti?
The code is typically caused by a malfunctioning diagnosis sensor unit, poor electrical connections, damaged wiring, or a blown fuse in the airbag system.
4. Is it safe to drive with the B1142 code?
It is not recommended, as the airbag system may not function correctly in the event of a collision, compromising safety.
5. How do you diagnose the B1142 code in an Infiniti?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the diagnosis sensor unit, checking for damaged wiring, and testing electrical connections.
6. Can the B1142 code be fixed by clearing it with a scanner?
Clearing the code may turn off the warning light temporarily, but the underlying issue must be addressed to prevent the code from returning.
7. How much does it cost to fix the B1142 code in an Infiniti?
Repair costs vary depending on the issue, but replacing the diagnosis sensor unit can cost between $300 and $600, plus labor.
8. Can I fix the B1142 code myself?
If you're experienced with automotive repairs, you can inspect wiring and connections, but replacing the diagnosis sensor unit often requires professional expertise.
9. Does the B1142 code affect other vehicle systems?
The code specifically impacts the airbag system and does not directly affect other systems, but it compromises passenger safety.
10. What should I do if my Infiniti shows the B1142 code?
Have your vehicle inspected by a qualified technician as soon as possible to ensure the airbag system is functioning properly.
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