B1120 Infiniti Code - Left Air Bag Satellite Sensor
Quick Answer
When the Air Bag Diagnosis Sensor Unit (ACU) define the both signal voltage of the “G†sensor and the Safing sensor to be that of the collision which exceeds the specified level, the driving circuit switches on and feeds the electric ignitor of both the side air bag and curtain air bag. Common causes include Faulty Left Air Bag Satellite Sensor, Left Air Bag Satellite Sensor harness is open or shorted, Left Air Bag Satellite Sensor 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
- B1120 Infiniti indicates Left Air Bag Satellite Sensor.
- Common causes
- Common causes include Faulty Left Air Bag Satellite Sensor, Left Air Bag Satellite Sensor harness is open or shorted, Left Air Bag Satellite Sensor 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 B1120 Infiniti Description
The Satellite Sensor is an integrated type of the G sensor element for side collision with output terminals for signal voltage.
What are the Possible Causes of the DTC B1120 Infiniti?
- Faulty Left Air Bag Satellite Sensor
- Left Air Bag Satellite Sensor harness is open or shorted
- Left Air Bag Satellite Sensor circuit poor electrical connection
How to Fix the DTC B1120 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 B1120 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 B1120 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 B1120 Infiniti Code
1. What does the OBDII code B1120 mean on an Infiniti?
The B1120 code indicates an issue with the Left Air Bag Satellite Sensor, which monitors crash forces and communicates with the airbag control module.
2. What are the symptoms of a B1120 code on an Infiniti?
Common symptoms include the airbag warning light illuminating on the dashboard and the airbag system potentially being disabled.
3. What causes the B1120 code to appear?
Causes can include a faulty Left Air Bag Satellite Sensor, damaged wiring or connectors, or a malfunction in the airbag control module.
4. Can I drive my Infiniti with a B1120 code?
While the vehicle may still be drivable, the airbag system may not deploy during an accident, posing a serious safety risk.
5. How do I diagnose the B1120 code on my Infiniti?
Diagnosis involves checking the wiring and connectors for damage, testing the Left Air Bag Satellite Sensor, and using a scan tool to verify the code.
6. How do I fix the B1120 code on an Infiniti?
Repairs may include replacing the Left Air Bag Satellite Sensor, repairing damaged wiring, or resetting the airbag system with a scan tool.
7. How much does it cost to fix the B1120 code?
The cost can vary, but replacing the sensor typically ranges from $200 to $400, including parts and labor.
8. Can a B1120 code be triggered by an accident?
Yes, the code can be triggered if the sensor detects a crash or if the sensor is damaged during an impact.
9. Do I need to replace the airbag control module to fix the B1120 code?
Not necessarily. The module is usually fine unless it has been specifically diagnosed as faulty.
10. Can clearing the B1120 code with a scan tool fix the issue?
Clearing the code may turn off the warning light temporarily, but the underlying problem must be fixed to prevent the code from returning.
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