AutoCodes – Generic – B2691

B2691 Code - Left Seat Belt Switch Circuit Fault

Quick Answer

The Restraints Control Module (RCM) checks the Left Seat Belt Buckle Switch for faults. Common causes include Faulty Left Seat Belt Buckle Switch, Left Seat Belt Buckle Switch harness is open or shorted, Left Seat Belt Buckle Switch 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: B2691 indicates Left Seat Belt Switch Circuit Fault.
Common causes: Common causes include Faulty Left Seat Belt Buckle Switch, Left Seat Belt Buckle Switch harness is open or shorted, Left Seat Belt Buckle Switch 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 5,404

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 Jan 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2691 Description

The Restraints Control Module (RCM) checks the Left Seat Belt Buckle Switch for faults. If the RCM detects an open circuit or short to battery fault, it will store DTC B2691 in memory and flash Code 51 on AIR BAG warning light.

OBDII Code B2691 - Left Seat Belt Switch Circuit Fault - AutoCodes.com — B2691 Code - Left Seat Belt Switch Circuit Fault

What does this mean?

What are the Possible Causes of the DTC B2691?

Faulty Left Seat Belt Buckle Switch
Left Seat Belt Buckle Switch harness is open or shorted
Left Seat Belt Buckle Switch circuit poor electrical connection
Faulty Restraints Control Module (RCM)

How to Fix the DTC B2691?

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 B2691 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 B2691 code?

Need more information on how to fix the B2691 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2691 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2691 Ford — Left Seat Belt Switch Circuit Fault
B2691 Jaguar — Left Seat Belt Switch Circuit Fault
B2691 Lincoln — Left Seat Belt Switch Circuit Fault
B2691 Mercury — Left Seat Belt Switch Circuit Fault

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 B2691 Code

1. What are the common symptoms of OBDII code B2691 (Left Seat Belt Switch Circuit Fault)?

- Common symptoms include the airbag warning light being illuminated on the dashboard and potential issues with the seat belt reminder system.

2. What are the possible causes of OBDII code B2691?

- The code B2691 can be triggered by a faulty left seat belt switch, damaged wiring or connectors in the seat belt system, or a malfunctioning airbag control module.

3. How can I diagnose the cause of OBDII code B2691?

- Diagnosing the code may involve visually inspecting the seat belt switch and related wiring, testing the electrical connections, and using a scan tool to retrieve and interpret the fault codes.

4. Can I repair OBDII code B2691 on my own?

- Depending on your level of expertise, you may be able to repair the issue yourself by replacing the faulty seat belt switch, repairing damaged wiring, or addressing any loose connections.

5. Is it safe to drive with OBDII code B2691 present?

- While the vehicle may still be operable, it is recommended to address the issue promptly to ensure the proper functioning of the airbag system and seat belt reminder feature.

6. How much does it typically cost to repair OBDII code B2691?

- The cost of repairing OBDII code B2691 can vary depending on the cause of the issue, the extent of the repairs needed, and whether you choose to DIY or seek professional help.

7. Will resetting the fault codes make OBDII code B2691 disappear permanently?

- Resetting the fault codes may temporarily turn off the warning light, but if the underlying issue causing code B2691 is not fixed, the code is likely to reappear upon the next system check.

8. Can a faulty left seat belt switch affect the overall safety of the vehicle?

- Yes, a faulty left seat belt switch can impact the proper functioning of the airbag system and seat belt reminder, compromising the safety features designed to protect occupants in the event of a collision.

9. Are there any recalls or technical service bulletins related to OBDII code B2691?

- It's recommended to check with the vehicle manufacturer or a certified dealership to inquire about any recalls or technical service bulletins related to OBDII code B2691 for your specific vehicle make and model.

10. How can I prevent OBDII code B2691 from occurring in the future?

- Regularly inspecting the seat belt system, addressing any issues promptly, and following the manufacturer's recommended maintenance schedule can help prevent the occurrence of OBDII code B2691.