AutoCodes – Infiniti – B1020 Infiniti

B1020 Infiniti Code - Occupant Sensor Control Unit

Quick Answer

The Occupant Sensor Control Unit suppresses the deployment of passenger air bag when the condition of the passenger seat is empty or child and child-seat. Common causes include Faulty Occupant Sensor Control Unit, Occupant Sensor Control Unit harness is open or shorted, Occupant Sensor Control 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: B1020 Infiniti indicates Occupant Sensor Control Unit.
Common causes: Common causes include Faulty Occupant Sensor Control Unit, Occupant Sensor Control Unit harness is open or shorted, Occupant Sensor Control 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.

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Code Popularity 3,286

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1020 Infiniti Description

The Occupant Sensor Control Unit suppresses the deployment of passenger air bag when the condition of the passenger seat is empty or child and child-seat. And turns on the cut-off telltale lamp when the condition of the passenger seat is child-seat and child. In the case of malfunction, the blinking of the SRS air bag warning lamp reports the malfunction to the driver and by the on board self-diagnosis system. This Occupant Sensor Control Unit classifies occupant in the passenger seat and detects electrical malfunctions in Occupant Classification System, and transmits malfunction information to air bag control unit.
It is integrated into the seat sensor mat and detects the occupants with Occupant Classification System (OCS) control unit that classifies the occupants.

OBDII Code B1020 Infiniti - Occupant Sensor Control Unit - AutoCodes.com — B1020 Infiniti Code - Occupant Sensor Control Unit

What does this mean?

What are the Possible Causes of the DTC B1020 Infiniti?

Faulty Occupant Sensor Control Unit
Occupant Sensor Control Unit harness is open or shorted
Occupant Sensor Control Unit circuit poor electrical connection
Faulty Diagnosis Sensor Unit

How to Fix the DTC B1020 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 B1020 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 B1020 Infiniti code?

Need more information on how to fix the B1020 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1020 Infiniti 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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1020 Infiniti Code

1. What are the common symptoms of an OBDII code B1020 in an Infiniti related to the Occupant Sensor Control Unit?

- Common symptoms include the airbag warning light staying on, the passenger airbag not deploying in a collision, and potential issues with the seat belt warning system.

2. What are the possible causes of an OBDII code B1020 in an Infiniti?

- The code B1020 in an Infiniti is often caused by a malfunction in the Occupant Sensor Control Unit, which could be due to wiring issues, sensor failure, or a faulty control unit.

3. How can I diagnose a B1020 OBDII code in my Infiniti related to the Occupant Sensor Control Unit?

- Diagnosing a B1020 code typically involves using a professional OBDII scanner to retrieve the code, inspecting the wiring and connectors related to the Occupant Sensor Control Unit, and testing the sensors for proper function.

4. Can I repair a B1020 OBDII code related to the Occupant Sensor Control Unit in my Infiniti myself?

- While some basic diagnostics can be done at home, repairing a B1020 code related to the Occupant Sensor Control Unit often requires specialized tools and expertise. It is recommended to seek assistance from a qualified mechanic or dealership.

5. Is it safe to drive my Infiniti with a B1020 OBDII code related to the Occupant Sensor Control Unit?

- It is not recommended to drive your Infiniti with a B1020 code related to the Occupant Sensor Control Unit as it could affect the proper deployment of airbags in case of an accident, compromising the safety of occupants.

6. Are there any temporary fixes for a B1020 OBDII code related to the Occupant Sensor Control Unit in my Infiniti?

- Temporary fixes like resetting the airbag system by disconnecting the battery may sometimes clear the code temporarily, but the underlying issue with the Occupant Sensor Control Unit should be addressed for long-term safety.

7. How much does it typically cost to repair a B1020 OBDII code related to the Occupant Sensor Control Unit in an Infiniti?

- The cost of repairing a B1020 code can vary depending on the exact cause of the issue, but it may involve replacing the Occupant Sensor Control Unit, which can range from a few hundred to a thousand dollars including parts and labor.

8. Can a B1020 OBDII code related to the Occupant Sensor Control Unit in an Infiniti be intermittent?

- Yes, a B1020 code can sometimes be intermittent, meaning it may come and go based on certain conditions. However, it is important not to ignore the code and have it diagnosed and repaired promptly.

9. Will disconnecting the battery reset a B1020 OBDII code related to the Occupant Sensor Control Unit in my Infiniti?

- Disconnecting the battery may reset the code temporarily, but if the underlying issue with the Occupant Sensor Control Unit is not fixed, the code is likely to reappear after driving the vehicle for a certain period.

10. Can a B1020 OBDII code related to the Occupant Sensor Control Unit affect the overall functionality of the airbag system in my Infiniti?

- Yes, a B1020 code related to the Occupant Sensor Control Unit can affect the proper functioning of the airbag system, potentially leading to non-deployment or improper deployment of airbags in the event of a collision.