AutoCodes – Generic – B1366

B1366 Code - Front-Passenger Seat Belt Pretensioner Open

Quick Answer

The Seat Belt Pretensioners (BPT) are located at both sides of the center pillar. Common causes include Faulty Front-Passenger Seat Belt Pretensioner, Front-Passenger Seat Belt Pretensioner harness is open or shorted, Front-Passenger Seat Belt Pretensioner 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: B1366 indicates Front-Passenger Seat Belt Pretensioner Open.
Common causes: Common causes include Faulty Front-Passenger Seat Belt Pretensioner, Front-Passenger Seat Belt Pretensioner harness is open or shorted, Front-Passenger Seat Belt Pretensioner 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 5,502

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 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1366 Description

The Seat Belt Pretensioners (BPT) are located at both sides of the center pillar. The Seat Belt Pretensioner tightens seat belt before air bag deploys to protect the passenger from bumping against crush pad, steering wheel, and front window. In the Seat Belt Pretensioner, there are an ignition circuit and cylinder for rewinding belt. Gas chamber generates an expansive force of gases to push the piston in the cylinder to lock the seat belt. The Seat Belt Pretensioners circuit consists of the Supplemental Restraint System Control Module (SRSCM) and two Seat Belt Pretensioners. The SRSCM sets the Diagnostic Trouble Code (DTC) if it detects that the resistance of BPT squib is too high or low.

OBDII Code B1366 - Front-Passenger Seat Belt Pretensioner Open - AutoCodes.com — B1366 Code - Front-Passenger Seat Belt Pretensioner Open

What does this mean?

What are the Possible Causes of the DTC B1366?

Faulty Front-Passenger Seat Belt Pretensioner
Front-Passenger Seat Belt Pretensioner harness is open or shorted
Front-Passenger Seat Belt Pretensioner circuit poor electrical connection
Faulty Supplemental Restraint System Control Module (SRSCM)

How to Fix the DTC B1366?

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 B1366 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 B1366 code?

Need more information on how to fix the B1366 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1366 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1366 Hyundai — Front-Passenger Seat Belt Pretensioner Open
B1366 KIA — Front-Passenger Seat Belt Pretensioner Open

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 B1366 Code

1. What are the common symptoms of OBDII code B1366 (Front-Passenger Seat Belt Pretensioner Open)?

The common symptoms of this code may include the airbag warning light staying illuminated on the dashboard and a diagnostic trouble code being stored in the vehicle's computer system.

2. What are some possible causes of OBDII code B1366?

Possible causes of this code include a faulty seat belt pretensioner, damaged wiring or connectors in the seat belt pretensioner circuit, or a malfunctioning airbag control module.

3. How serious is OBDII code B1366 (Front-Passenger Seat Belt Pretensioner Open)?

This code indicates a problem with the front-passenger seat belt pretensioner system, which is a crucial safety component. It is important to address this issue promptly to ensure the proper operation of the seat belt pretensioner and airbag system in the event of a collision.

4. Can I continue driving with OBDII code B1366 present?

It is not recommended to continue driving with this code present, as it may compromise the effectiveness of the front-passenger seat belt pretensioner system in the event of an accident. It is advisable to have the issue diagnosed and repaired by a qualified technician as soon as possible.

5. How can OBDII code B1366 be diagnosed?

Diagnosing this code typically involves using a scan tool to retrieve the specific fault code, inspecting the seat belt pretensioner system for any visible damage, and testing the wiring and connectors for continuity and proper operation.

6. What are some repair tips for fixing OBDII code B1366?

Repair tips for this code may include checking and repairing any damaged wiring or connectors in the seat belt pretensioner circuit, replacing a faulty seat belt pretensioner, or resetting the airbag control module after repairs have been made.

7. Is it possible to reset OBDII code B1366 without fixing the underlying issue?

While it may be possible to clear the diagnostic trouble code temporarily, the underlying issue causing the code will still persist. It is important to address the root cause of the problem to prevent the code from reoccurring in the future.

8. Can I repair OBDII code B1366 myself, or should I seek professional help?

Repairing OBDII code B1366 may require specialized knowledge and tools, so it is recommended to seek the assistance of a qualified automotive technician to diagnose and repair the issue properly.

9. Are there any recalls or technical service bulletins related to OBDII code B1366?

It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code B1366 to see if there are any known issues or remedies available.

10. How can I prevent OBDII code B1366 from occurring in the future?

Regular maintenance, including checking the seat belt pretensioner system for any signs of wear or damage, and addressing any issues promptly can help prevent OBDII code B1366 from occurring in the future.