AutoCodes – Nissan – B1020 Nissan

B1020 Nissan 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 Nissan 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 9,954

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 Nissan 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 Nissan - Occupant Sensor Control Unit - AutoCodes.com — B1020 Nissan Code - Occupant Sensor Control Unit

What does this mean?

What are the Possible Causes of the DTC B1020 Nissan?

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 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 B1020 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 B1020 Nissan code?

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

Need Help with the Code?

Get the B1020 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.

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 Nissan Code

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

The common symptoms include the airbag warning light staying illuminated on the dashboard and possible issues with the airbag system deploying correctly in the event of a crash.

2. What are the possible causes of OBDII code B1020 in a Nissan?

The code B1020 in a Nissan typically indicates a malfunction in the Occupant Sensor Control Unit, which can be caused by a faulty sensor, wiring issues, or a defective control unit.

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

Diagnosing OBDII code B1020 involves using a diagnostic scanner to read the code, checking the wiring and connections related to the Occupant Sensor Control Unit, and testing the sensors for proper functioning.

4. Is it safe to continue driving my Nissan with OBDII code B1020 related to the Occupant Sensor Control Unit?

It is not recommended to drive your Nissan with the OBDII code B1020 present, as it indicates a potential issue with the airbag system, which may compromise your safety in the event of a collision.

5. How can I repair OBDII code B1020 in a Nissan related to the Occupant Sensor Control Unit?

Repairing OBDII code B1020 involves troubleshooting the sensor, wiring, and control unit to identify the specific issue and then replacing or repairing the faulty component as needed.

6. Can I reset the OBDII code B1020 in my Nissan related to the Occupant Sensor Control Unit?

Resetting the OBDII code B1020 may temporarily turn off the warning light, but it will likely reappear if the underlying issue with the Occupant Sensor Control Unit is not addressed.

7. Are there any recalls or technical service bulletins related to OBDII code B1020 in Nissan vehicles?

It's recommended to check with a Nissan dealership or online resources for any recalls or technical service bulletins related to OBDII code B1020 in your specific Nissan model.

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

The cost of repairing OBDII code B1020 can vary depending on the specific issue and the labor rates in your area, but it's advisable to get a diagnosis from a qualified mechanic for an accurate estimate.

9. Can a DIY enthusiast repair OBDII code B1020 in a Nissan related to the Occupant Sensor Control Unit?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing OBDII code B1020 related to the Occupant Sensor Control Unit may require specialized tools and expertise best handled by a professional mechanic.

10. How important is it to address OBDII code B1020 in a Nissan related to the Occupant Sensor Control Unit promptly?

It is crucial to address OBDII code B1020 promptly, as it indicates a potential safety issue with the airbag system. Ignoring this code can compromise the effectiveness of the airbags in the event of a collision, putting the occupants at risk.