B1205 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
- B1205 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 B1205 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 B1205 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 B1205 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 B1205 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 B1205 Nissan 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 B1205 Nissan Code
1. What does the OBDII code B1205 mean on a Nissan?
The B1205 code indicates an issue with the Diagnosis Sensor Unit, which is part of the airbag system.
2. What are the common symptoms of the B1205 code in a Nissan?
Symptoms may include the airbag warning light staying on, a stored trouble code, or the airbag system being disabled.
3. What causes the B1205 code to appear in a Nissan?
Common causes include a faulty diagnosis sensor unit, damaged wiring or connectors, or a poor electrical connection in the airbag system.
4. Is it safe to drive with the B1205 code active?
While the vehicle may still be drivable, the airbag system may not function in the event of an accident, making it unsafe.
5. How do you diagnose the B1205 code in a Nissan?
Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the diagnosis sensor unit, and checking related wiring and connections for damage or corrosion.
6. How do you fix the B1205 code in a Nissan?
Repairs may include replacing the diagnosis sensor unit, repairing or replacing damaged wiring, or cleaning and securing electrical connections.
7. Can a dead battery trigger the B1205 code in a Nissan?
Yes, a weak or dead battery can cause voltage irregularities that may trigger the code.
8. Where is the diagnosis sensor unit typically located in a Nissan?
The diagnosis sensor unit is often located under the center console or near the vehicle's floor beneath the dashboard.
9. How much does it cost to repair the B1205 code in a Nissan?
Repair costs can range from $200 to $600 depending on labor rates and whether the diagnosis sensor unit needs replacement.
10. Can I clear the B1205 code without repairing the issue?
You can clear the code temporarily with a scan tool, but it will likely return if the underlying issue is not resolved.
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