B1120 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 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 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?
- 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?
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 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.
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Information for Specific Makes
- B1120 Infiniti — Left Air Bag Satellite Sensor
- B1120 Nissan — Left Air Bag Satellite Sensor
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 Code
1. What are the common symptoms of OBDII code B1120 (Left Air Bag Satellite Sensor)?
- Common symptoms include the airbag warning light illuminating on the dashboard and a potential fault with the left airbag satellite sensor system.
2. What is the main cause of OBDII code B1120?
- The main cause of OBDII code B1120 is typically a malfunction or failure in the left airbag satellite sensor, leading to a fault in the airbag system.
3. How can I diagnose the issue related to OBDII code B1120?
- Diagnosis involves using a scan tool to retrieve the specific fault code, inspecting the left airbag satellite sensor for damage or loose connections, and testing the sensor's functionality.
4. Can a DIY enthusiast repair OBDII code B1120 at home?
- Repairing OBDII code B1120 may require specialized tools and knowledge of airbag systems, so it is recommended to consult a professional mechanic for proper diagnosis and repair.
5. Is it safe to drive with OBDII code B1120 present?
- It is not recommended to drive with OBDII code B1120 present, as it indicates a potential issue with the left airbag satellite sensor, compromising the safety of the airbag system in the event of a collision.
6. How much does it typically cost to repair OBDII code B1120?
- The cost of repairing OBDII code B1120 can vary depending on the extent of the issue, but it may involve replacing the left airbag satellite sensor or addressing wiring/connectivity issues.
7. Are there any preventive measures to avoid OBDII code B1120 from occurring?
- Regular maintenance and inspection of the airbag system, including the left airbag satellite sensor, can help prevent issues that may trigger OBDII code B1120.
8. Can weather conditions affect OBDII code B1120?
- Extreme weather conditions or exposure to moisture can potentially impact the performance of the left airbag satellite sensor and contribute to triggering OBDII code B1120.
9. What are the risks of ignoring OBDII code B1120?
- Ignoring OBDII code B1120 can result in the airbag system not deploying properly in the event of a collision, increasing the risk of injury to vehicle occupants.
10. How long does it take to repair OBDII code B1120?
- The repair time for OBDII code B1120 can vary depending on the exact cause of the issue, but it typically takes a few hours to diagnose and repair the left airbag satellite sensor problem.
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