AutoCodes – Buick – B2699 Buick

B2699 Buick Code - Right Headlamp Control Circuit

Quick Answer

When the Body Control Module (BCM) senses a request for low-beam headlamp illumination, the BCM sends a ground signal to the low-beam headlamp relay through the headlamp low-beam relay control circuit. Common causes include Faulty Right Low Beam Headlamp, Right Low Beam Headlamp harness is open or shorted, Right Low Beam Headlamp 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: B2699 Buick indicates Right Headlamp Control Circuit.
Common causes: Common causes include Faulty Right Low Beam Headlamp, Right Low Beam Headlamp harness is open or shorted, Right Low Beam Headlamp 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 1,525

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 May 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2699 Buick Description

When the Body Control Module (BCM) senses a request for low-beam headlamp illumination, the BCM sends a ground signal to the low-beam headlamp relay through the headlamp low-beam relay control circuit. The headlamp low beam relay will apply voltage to illuminate the headlamps. The Diagnostic Trouble Code (DTC) sets when the BCM receives a command to illuminate the low beam headlamps and the headlamp low beam relay control circuit is open or shorted to voltage or when the BCM does not receive a command to illuminate the low beam headlamps and the headlamp low beam relay control circuit is shorted to ground.

OBDII Code B2699 Buick - Right Headlamp Control Circuit - AutoCodes.com — B2699 Buick Code - Right Headlamp Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2699 Buick?

Faulty Right Low Beam Headlamp
Right Low Beam Headlamp harness is open or shorted
Right Low Beam Headlamp circuit poor electrical connection
Faulty Low Beam Headlamp Relay
Faulty Body Control Module (BCM)

How to Fix the DTC B2699 Buick?

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 does this mean?

Code Tech Notes

B2699:01 Right Headlamp Control Circuit Short to Battery
B2699:02 Right Headlamp Control Circuit Short to Ground
B2699:04 Right Headlamp Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2699 Buick 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.

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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 B2699 Buick Code

1. What are the common symptoms of OBDII code B2699 in a Buick related to the right headlamp control circuit?

- The common symptoms include a non-functional or erratic operation of the right headlamp, dimming or flickering of the right headlamp, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B2699 in a Buick indicating a problem with the right headlamp control circuit?

- The code may be triggered by issues such as a faulty headlamp control module, damaged wiring or connectors, a defective headlamp switch, or a blown fuse related to the right headlamp circuit.

3. How can I diagnose the OBDII code B2699 in my Buick associated with the right headlamp control circuit?

- Diagnosing the code involves inspecting the wiring and connectors for any visible damage, testing the headlamp control module and switch for proper functionality, and checking the fuses related to the right headlamp circuit.

4. What are some recommended repair tips for addressing OBDII code B2699 in a Buick linked to the right headlamp control circuit?

- Repair tips may include repairing or replacing damaged wiring and connectors, replacing a faulty headlamp control module or switch, ensuring proper grounding connections, and resetting the fault codes after repairs are made.

5. Can I fix the OBDII code B2699 related to the right headlamp control circuit in my Buick at home, or should I seek professional help?

- Depending on your experience with automotive repairs and diagnostic tools, you may be able to address the issue at home by following a repair manual specific to your Buick model. However, seeking professional help from a certified mechanic is recommended for accurate diagnosis and repair.

6. Is it safe to drive my Buick with the OBDII code B2699 indicating a problem with the right headlamp control circuit?

- It is not advisable to drive your Buick with a malfunctioning right headlamp control circuit as it may affect your visibility on the road, especially at night or in adverse weather conditions. Promptly address the issue to ensure safe driving.

7. Will resetting the OBDII code B2699 in my Buick fix the issue with the right headlamp control circuit?

- Resetting the fault code may temporarily clear the warning light, but it will not fix the underlying problem causing the OBDII code B2699 related to the right headlamp control circuit. Proper diagnosis and repair are necessary to resolve the issue.

8. How can I prevent OBDII code B2699 from reoccurring in my Buick after repairing the right headlamp control circuit issue?

- To prevent the code from reoccurring, ensure all repairs are done accurately, use high-quality replacement parts, regularly inspect the headlamp circuit for any signs of wear or damage, and follow recommended maintenance schedules for your Buick.

9. Are there any recalls or technical service bulletins related to OBDII code B2699 in Buick vehicles concerning the right headlamp control circuit?

- It is recommended to check with your local Buick dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins related to OBDII code B2699 and the right headlamp control circuit in your specific Buick model.

10. Can extreme weather conditions or water exposure cause OBDII code B2699 in a Buick associated with the right headlamp control circuit?

- Yes, extreme weather conditions or water exposure can potentially cause issues with the right headlamp control circuit, leading to the triggering of OBDII code B2699. It is essential to protect the headlamp components from such conditions to prevent damage and malfunctions.