AutoCodes – Lincoln – B2691 Lincoln

B2691 Lincoln 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 Lincoln 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 533

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B2691 Lincoln?

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 Lincoln?

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 Lincoln 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 Lincoln code?

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

Need Help with the Code?

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

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 Lincoln Code

1. What does the OBDII code B2691 mean on a Lincoln?

B2691 indicates a fault in the left seat belt switch circuit, which monitors the status of the driver's seat belt.

2. What are the common symptoms of a B2691 code?

Symptoms may include the seat belt warning light staying on, chimes sounding regardless of seat belt usage, or incorrect seat belt status readings.

3. What causes the B2691 code to appear?

Common causes include a faulty seat belt switch, damaged wiring or connectors in the circuit, or a malfunctioning Body Control Module (BCM).

4. Can the B2691 code affect vehicle safety systems?

Yes, this code can impact safety alerts and may interfere with proper airbag deployment if the system cannot detect seat belt usage accurately.

5. How do you diagnose the B2691 code?

Diagnosis involves checking the seat belt switch for proper operation, inspecting the wiring and connectors for damage or corrosion, and testing the circuit with a multimeter.

6. Can I fix the B2691 code myself?

If youâ€™re experienced with automotive diagnostics, you can try inspecting and repairing damaged wiring or replacing the seat belt switch. Otherwise, professional assistance is recommended.

7. How much does it cost to repair a B2691 code on a Lincoln?

Repair costs vary depending on the issue, ranging from $50 to $200 for a seat belt switch replacement, or more if wiring or module repairs are needed.

8. Will clearing the code with a scanner fix the problem?

No, clearing the code will only temporarily hide it. The underlying issue must be repaired to prevent the code from returning.

9. Can a B2691 code trigger other warning lights?

Yes, it may cause the airbag or seat belt warning lights to illuminate, as these systems are interconnected.

10. Is it safe to drive with a B2691 code?

While the vehicle may still be drivable, the compromised seat belt monitoring system could pose a safety risk, especially if other systems like airbag deployment are affected. Prompt repair is advised.