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Engine-Codes – GMC – B3806 2016 GMC Sierra

B3806 2016 GMC Sierra Code - High Beam and Headlamp Flash Select Circuit Malfunction

Quick Answer

The B3806 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a malfunction in the high beam and headlamp flash select circuit. Common causes include Faulty high beam switch, Wiring issues in the headlight circuit, Blown fuse related to the high beams. 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
B3806 2016 GMC Sierra indicates High Beam and Headlamp Flash Select Circuit Malfunction.
Common causes
Common causes include Faulty high beam switch, Wiring issues in the headlight circuit, Blown fuse related to the high beams.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B3806 2016 GMC Sierra Description

The B3806 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a malfunction in the high beam and headlamp flash select circuit. This code typically signifies that there is an issue with the circuit that controls the high beams and headlamp flash feature of the vehicle. The high beams are an essential component of a vehicle's lighting system, providing increased visibility for the driver in low-light conditions. The headlamp flash select circuit allows the driver to quickly flash the high beams to signal other drivers or pedestrians.

OBDII Code B3806 2016 GMC Sierra - High Beam and Headlamp Flash Select Circuit Malfunction
B3806 2016 GMC Sierra Code - High Beam and Headlamp Flash Select Circuit Malfunction

Common Causes of B3806 2016 GMC Sierra

  1. Faulty high beam switch.
  2. Wiring issues in the headlight circuit.
  3. Blown fuse related to the high beams.
  4. Malfunctioning control module for the headlight system.

Symptoms of B3806 2016 GMC Sierra

  1. High beams not turning on or functioning intermittently.
  2. Headlamp flash feature not working when activated.
  3. High beams getting stuck in the on position.
  4. Dashboard warning light indicating a headlight issue.

How to Fix B3806 2016 GMC Sierra

  1. Begin by inspecting the wiring in the headlight circuit for any signs of damage or corrosion. Repair or replace any damaged wiring.
  2. Check the high beam switch for proper functionality. If the switch is faulty, replace it with a new one.
  3. Inspect and replace any blown fuses related to the high beams.
  4. Test the control module for the headlight system and replace it if necessary.
  5. After making the necessary repairs, clear the DTC and test the high beams and headlamp flash feature to ensure that they are functioning correctly.

Cost to Fix B3806 2016 GMC Sierra

The cost of repairing a high beam and headlamp flash select circuit malfunction can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the repair costs for this type of issue can range from $100 to $300, including parts and labor. However, it's important to note that the actual cost can be higher or lower based on factors such as the location of the repair shop, the vehicle make and model, and the hourly labor rates. It's recommended to get a detailed estimate from a trusted auto repair shop before proceeding with the repairs.

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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 B3806 2016 GMC Sierra Code

1. What does OBDII code B3806 mean for a 2016 GMC Sierra?

The code B3806 indicates a High Beam and Headlamp Flash Select Circuit Malfunction in the vehicle.

2. What are the common symptoms of OBDII code B3806 in a 2016 GMC Sierra?

Common symptoms include issues with the operation of the high beams and headlamp flash select function, such as non-functioning or erratic behavior.

3. What are the possible causes of OBDII code B3806 in a 2016 GMC Sierra?

Causes of this code may include faulty wiring or connections in the high beam and headlamp flash select circuit, a malfunctioning headlamp flash switch, or a problem with the control module.

4. How can I diagnose OBDII code B3806 in my 2016 GMC Sierra?

To diagnose this code, you may need to perform a thorough inspection of the high beam and headlamp flash circuit, check for wiring issues, test the headlamp flash switch, and use a diagnostic scan tool to gather more information.

5. Can I drive my 2016 GMC Sierra with OBDII code B3806?

It is not recommended to drive the vehicle with unresolved OBDII code B3806, as it may affect the proper functioning of the high beams and headlamp flash select feature, potentially compromising visibility and safety.

6. How can I repair OBDII code B3806 in my 2016 GMC Sierra?

Repairing this code may involve addressing any wiring issues, replacing a faulty headlamp flash switch, or repairing the control module as needed. It is recommended to consult a qualified mechanic for proper diagnosis and repair.

7. Is OBDII code B3806 a serious issue in a 2016 GMC Sierra?

While the code itself may not pose an immediate safety risk, it is important to address it promptly to ensure the proper functioning of the high beam and headlamp flash select system for optimal visibility and safety while driving.

8. Can a DIY enthusiast fix OBDII code B3806 in a 2016 GMC Sierra?

Depending on the root cause of the issue, some DIY enthusiasts with experience in automotive electrical systems may be able to diagnose and repair OBDII code B3806. However, complex issues may require professional assistance.

9. How much does it cost to repair OBDII code B3806 in a 2016 GMC Sierra?

Repair costs for OBDII code B3806 can vary depending on the underlying cause of the issue, labor rates, and the cost of any replacement parts needed. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

10. Can OBDII code B3806 be reset in a 2016 GMC Sierra after repair?

Once the underlying issue causing OBDII code B3806 has been addressed and repaired, the code can be cleared using a diagnostic scan tool to reset the system in a 2016 GMC Sierra.

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