B1108 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
- B1108 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 B1108 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 B1108 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 B1108 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 B1108 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 B1108 Nissan code?
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Need Help with the Code?
Get the B1108 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 B1108 Nissan Code
1. What does the OBDII code B1108 mean on a Nissan?
The B1108 code refers to a fault in the Diagnosis Sensor Unit (DSU), which is a critical part of the airbag system.
2. What are the symptoms of a B1108 code in a Nissan?
Common symptoms include the airbag warning light staying on, the potential for airbag system malfunction, and diagnostic trouble codes stored in the ECU.
3. What causes the B1108 code to appear on a Nissan?
The code is often caused by a faulty Diagnosis Sensor Unit, damaged wiring or connectors, or an issue with the vehicle’s airbag control module.
4. Is it safe to drive with the B1108 code on my Nissan?
It’s not recommended. The B1108 code indicates a potential issue with the airbag system, which may not function properly in a collision.
5. How is the B1108 code diagnosed?
A mechanic will use a scan tool to verify the code, inspect the Diagnosis Sensor Unit and related wiring, and check for other potential issues with the airbag system.
6. Can I fix the B1108 code on my Nissan myself?
Fixing this code usually requires expertise in diagnosing and repairing airbag systems. It’s best to leave this to a professional for safety reasons.
7. How much does it cost to repair the B1108 code on a Nissan?
Repair costs vary but typically range from $200 to $600, depending on whether the Diagnosis Sensor Unit needs replacement or if it’s a wiring issue.
8. Can a weak battery trigger the B1108 code?
Yes, a weak or failing battery can sometimes cause airbag-related codes, including B1108, due to voltage irregularities.
9. How do I reset the B1108 code on my Nissan?
The code can be cleared with a scan tool after repairs are completed, but it will return if the underlying issue isn’t resolved.
10. Do I need to replace the Diagnosis Sensor Unit for the B1108 code?
Not always. The issue could be with the wiring or connectors. Proper diagnosis is required to confirm if the unit itself is faulty.
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