B1140 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
- B1140 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 B1140 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 B1140 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 B1140 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 B1140 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 B1140 Infiniti code?
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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 B1140 Infiniti Code
1. What are the common symptoms of OBDII code B1140 in an Infiniti related to the Diagnosis Sensor Unit?
- Common symptoms include issues with the airbag system, malfunction indicator lamp (MIL) illumination, and potential airbag deployment concerns.
2. What are the possible causes of OBDII code B1140 in an Infiniti indicating a problem with the Diagnosis Sensor Unit?
- The code B1140 in an Infiniti typically points to a faulty Diagnosis Sensor Unit, damaged wiring, or poor connections within the airbag system.
3. How can I diagnose OBDII code B1140 in my Infiniti related to the Diagnosis Sensor Unit?
- Proper diagnosis involves using a professional OBDII scanner to retrieve the specific trouble codes, inspecting the airbag system components, and checking for any visible signs of damage.
4. Is it safe to drive my Infiniti with OBDII code B1140 related to the Diagnosis Sensor Unit illuminated?
- It is not recommended to drive the vehicle with a B1140 code as it indicates potential issues with the airbag system, which could compromise safety in the event of an accident.
5. Can I repair OBDII code B1140 in my Infiniti related to the Diagnosis Sensor Unit myself?
- While some DIY enthusiasts may attempt to troubleshoot the issue, it is recommended to seek professional assistance to accurately diagnose and repair the problem to ensure safety and proper functionality.
6. Are there any common repair tips for fixing OBDII code B1140 in an Infiniti indicating a fault with the Diagnosis Sensor Unit?
- Common repair tips include checking and repairing any damaged wiring, ensuring proper connections in the airbag system, and replacing the Diagnosis Sensor Unit if necessary.
7. How much does it typically cost to repair OBDII code B1140 in an Infiniti related to the Diagnosis Sensor Unit?
- Repair costs can vary depending on the extent of the issue, but expect to pay for diagnostic fees, parts replacement, and labor, which can range from a few hundred to a thousand dollars.
8. Can resetting the OBDII system clear the B1140 code related to the Diagnosis Sensor Unit in an Infiniti?
- Resetting the OBDII system may temporarily clear the code, but it is essential to address the root cause of the issue to prevent the code from reappearing and potentially compromising safety.
9. Are there any recalls or service bulletins related to OBDII code B1140 in Infiniti vehicles concerning the Diagnosis Sensor Unit?
- It is advisable to check with the manufacturer or authorized dealerships for any recalls or service bulletins related to the B1140 code in Infiniti vehicles to address potential safety concerns promptly.
10. How can I prevent OBDII code B1140 related to the Diagnosis Sensor Unit from occurring in my Infiniti?
- To prevent the B1140 code, ensure regular maintenance of the airbag system, avoid physical damage to the vehicle, and address any warning signs promptly to maintain the safety features of your Infiniti.
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