AutoCodes – Generic – B1087

B1087 Code - Front Pre-Tensioner Left Short

Quick Answer

In the case of a frontal collision that exceeds specified impact level, the diagnosis sensor unit detects the deceleration caused by the collision. Common causes include Faulty Front Pre-Tensioner Left, Front Pre-Tensioner Left harness is open or shorted, Front Pre-Tensioner Left 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: B1087 indicates Front Pre-Tensioner Left Short.
Common causes: Common causes include Faulty Front Pre-Tensioner Left, Front Pre-Tensioner Left harness is open or shorted, Front Pre-Tensioner Left 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 5,812

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 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1087 Description

In the case of a frontal collision that exceeds specified impact level, the diagnosis sensor unit detects the deceleration caused by the collision. If restrains the passenger with seat belt easing the stress on passengers chest with load limiter.
The restraint system for front seat occupant consists of the pre-tensioner mechanism and load limiter mechanism.

OBDII Code B1087 - Front Pre-Tensioner Left Short - AutoCodes.com — B1087 Code - Front Pre-Tensioner Left Short

What does this mean?

What are the Possible Causes of the DTC B1087?

Faulty Front Pre-Tensioner Left
Front Pre-Tensioner Left harness is open or shorted
Front Pre-Tensioner Left circuit poor electrical connection

How to Fix the DTC B1087?

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 B1087 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 B1087 code?

Need more information on how to fix the B1087 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1087 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1087 Ford — Door Module LIN Bus 'A'
B1087 Infiniti — Front Pre-Tensioner Left Short
B1087 Lincoln — Door Module LIN Bus 'A'
B1087 Mercury — Door Module LIN Bus 'A'
B1087 Nissan — Front Pre-Tensioner Left Short

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 B1087 Code

1. What are the common symptoms of OBDII code B1087 Front Pre-Tensioner Left Short?

- The common symptoms include the airbag warning light illuminating on the dashboard and a potential loss of functionality in the front left seatbelt pre-tensioner system.

2. What are the possible causes of OBDII code B1087 Front Pre-Tensioner Left Short?

- The code B1087 Front Pre-Tensioner Left Short can be triggered by issues such as damaged wiring, a faulty pre-tensioner mechanism, or a loose connection in the system.

3. How serious is OBDII code B1087 Front Pre-Tensioner Left Short?

- This code indicates a problem with the front left seatbelt pre-tensioner system, which can impact the effectiveness of the seatbelt in the event of a collision. It is important to address this issue promptly.

4. Can OBDII code B1087 Front Pre-Tensioner Left Short be fixed at home?

- Fixing this code may require specialized tools and knowledge of automotive electrical systems. It is recommended to have a professional diagnose and repair the issue to ensure safety.

5. How can I diagnose OBDII code B1087 Front Pre-Tensioner Left Short?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the fault codes, as well as inspecting the wiring and connections in the front left seatbelt pre-tensioner system.

6. What are the repair options for OBDII code B1087 Front Pre-Tensioner Left Short?

- Repair options may include repairing or replacing damaged wiring, repairing or replacing the front left seatbelt pre-tensioner mechanism, or addressing any loose connections in the system.

7. Is it safe to drive with OBDII code B1087 Front Pre-Tensioner Left Short?

- It is not recommended to drive with this code present, as it indicates a potential issue with the front left seatbelt pre-tensioner system, which is a crucial safety component in the event of a collision.

8. How much does it cost to repair OBDII code B1087 Front Pre-Tensioner Left Short?

- The cost of repairing this code can vary depending on the underlying issue, the extent of the damage, and the labor rates of the repair shop. It is advisable to obtain a few quotes from different service providers.

9. Can OBDII code B1087 Front Pre-Tensioner Left Short affect other vehicle systems?

- While this code specifically relates to the front left seatbelt pre-tensioner system, it is essential to address the issue promptly to ensure the overall safety and functionality of the vehicle's restraint system.

10. How can I prevent OBDII code B1087 Front Pre-Tensioner Left Short from occurring again?

- To prevent this code from recurring, it is essential to regularly inspect and maintain the seatbelt pre-tensioner system, address any wiring or connection issues promptly, and follow the manufacturer's recommended maintenance schedule.