AutoCodes – Nissan – B1201 Nissan

B1201 Nissan Code - Left Side Front Curtain Air Bag Module Short

Quick Answer

The Air Bag Sensor Unit (Air Bag Control Module) monitors the Left Side Front Curtain Air Bag Module. Common causes include Faulty Left Side Front Curtain Air Bag Module, Left Side Front Curtain Air Bag Module harness is open or shorted, Left Side Front Curtain Air Bag Module 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: B1201 Nissan indicates Left Side Front Curtain Air Bag Module Short.
Common causes: Common causes include Faulty Left Side Front Curtain Air Bag Module, Left Side Front Curtain Air Bag Module harness is open or shorted, Left Side Front Curtain Air Bag Module 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 2,062

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 Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1201 Nissan Description

The Air Bag Sensor Unit (Air Bag Control Module) monitors the Left Side Front Curtain Air Bag Module. The Air Bag Sensor Unit sets the OBDII code when the circuit for the front Left Side Front Curtain Air Bag Module circuit t is shorted to some power supply circuits.

OBDII Code B1201 Nissan - Left Side Front Curtain Air Bag Module Short - AutoCodes.com — B1201 Nissan Code - Left Side Front Curtain Air Bag Module Short

What does this mean?

What are the Possible Causes of the DTC B1201 Nissan?

Faulty Left Side Front Curtain Air Bag Module
Left Side Front Curtain Air Bag Module harness is open or shorted
Left Side Front Curtain Air Bag Module circuit poor electrical connection
Faulty Air Bag Sensor Unit (Air Bag Control Module)

How to Fix the DTC B1201 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 B1201 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 B1201 Nissan code?

Need more information on how to fix the B1201 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1201 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 B1201 Nissan Code

1. What are the common symptoms of OBDII code B1201 for the Left Side Front Curtain Air Bag Module Short in a Nissan?

- Common symptoms include the airbag warning light illuminating on the dashboard, potential non-deployment of the airbag in an accident, and diagnostic trouble codes related to the airbag system.

2. What can cause the OBDII code B1201 in a Nissan related to the Left Side Front Curtain Air Bag Module Short?

- The code B1201 can be caused by a short circuit in the wiring harness, a faulty curtain airbag module, or a malfunction in the airbag control module.

3. How can I diagnose the OBDII code B1201 for the Left Side Front Curtain Air Bag Module Short in my Nissan?

- Diagnosing the code typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the wiring harness for any visible damage, and conducting further electrical testing as needed.

4. Are there any safety concerns associated with the OBDII code B1201 in a Nissan?

- Yes, there are safety concerns as the code indicates a potential issue with the left side front curtain airbag module, which could result in the airbag not deploying properly in the event of a collision.

5. Can I continue driving my Nissan with the OBDII code B1201 for the Left Side Front Curtain Air Bag Module Short?

- It is not recommended to drive the vehicle with an active airbag fault code, as the airbag system may not function correctly in an accident, increasing the risk of injury.

6. What are some repair tips for addressing the OBDII code B1201 in a Nissan?

- Repair tips may include inspecting and repairing any damaged wiring, replacing the left side front curtain airbag module if necessary, and resetting the airbag system after the repair is completed.

7. How much does it typically cost to repair the OBDII code B1201 related to the Left Side Front Curtain Air Bag Module Short in a Nissan?

- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can I reset the OBDII code B1201 for the Left Side Front Curtain Air Bag Module Short in my Nissan myself?

- While you may be able to reset the code with an OBDII scanner, it is important to address the underlying issue causing the fault code to prevent it from recurring and ensure the airbag system's proper function.

9. Will disconnecting the battery reset the OBDII code B1201 related to the Left Side Front Curtain Air Bag Module Short in my Nissan?

- Disconnecting the battery may clear the code temporarily, but it is not a recommended long-term solution as the underlying issue still needs to be diagnosed and repaired to ensure the airbag system's safety.

10. How can I prevent the OBDII code B1201 for the Left Side Front Curtain Air Bag Module Short from occurring in my Nissan in the future?

- Regular maintenance and inspections of the airbag system, prompt attention to any warning lights or abnormal behavior, and avoiding physical damage to the airbag components can help prevent the recurrence of this fault code.