AutoCodes – GMC – B2605 2014 GMC Sierra

B2605 2014 GMC Sierra Code - Right Daytime Running Lamps Control Circuit

Quick Answer

The ambient light sensor is used to monitor outside lighting conditions. Common causes include Faulty Right Headlamp Assembly, Right Headlamp Assembly harness is open or shorted, Right Headlamp Assembly 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: B2605 2014 GMC Sierra indicates Right Daytime Running Lamps Control Circuit.
Common causes: Common causes include Faulty Right Headlamp Assembly, Right Headlamp Assembly harness is open or shorted, Right Headlamp Assembly 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 164

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 B2605 2014 GMC Sierra Description

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 volts depending on outside lighting conditions. The Body Control Module (BCM) provides a 5-volt reference signal to the ambient light sensor and the Heating, Ventilation, and Air Conditioning (HVAC) control module provides a low reference ground. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either Daytime Running Lights (DRL) or Automatic Lamp Control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON. During low light conditions, the BCM will command the low beam headlamps ON. Any function or condition that turns on the headlamps will cancel the DRL operation. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem in the left DRL control circuit.

OBDII Code B2605 2014 GMC Sierra - Right Daytime Running Lamps Control Circuit - AutoCodes.com — B2605 2014 GMC Sierra Code - Right Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2605 2014 GMC Sierra?

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

How to Fix the DTC B2605 2014 GMC Sierra?

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

B2605:01 Right Daytime Running Lamps Control Circuit short to Battery
B2605:02 Right Daytime Running Lamps Control Circuit Short to Ground
B2605:04 Right Daytime Running Lamps Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2605 2014 GMC Sierra 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 B2605 2014 GMC Sierra code?

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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 B2605 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B2605 in a 2014 GMC Sierra related to the Right Daytime Running Lamps Control Circuit?

The common symptoms include the right daytime running lamp not functioning, flickering, or staying on constantly when the vehicle is running.

2. What are the possible causes of OBDII code B2605 in a 2014 GMC Sierra?

Possible causes can include a faulty daytime running lamp module, damaged wiring or connectors in the circuit, a blown fuse, or a problem with the right daytime running lamp itself.

3. How can I diagnose the Right Daytime Running Lamps Control Circuit issue in my 2014 GMC Sierra?

You can start by visually inspecting the wiring and connectors for any visible damage. Using a multimeter, test the continuity of the circuit and check the fuse related to the daytime running lamps. You may need to perform a more in-depth electrical diagnosis to pinpoint the exact cause.

4. Can I still drive my 2014 GMC Sierra with OBDII code B2605 active?

While the vehicle may still be drivable with this code, it is important to address the issue promptly to ensure proper functioning of the right daytime running lamp for safety reasons.

5. How do I repair OBDII code B2605 in a 2014 GMC Sierra?

Repair steps may involve replacing the faulty daytime running lamp module, repairing or replacing damaged wiring or connectors, replacing a blown fuse, or addressing any issues with the right daytime running lamp itself.

6. Is it safe to reset the OBDII code B2605 in a 2014 GMC Sierra without repairing the issue?

It is not recommended to simply reset the code without addressing the underlying problem, as the issue will likely persist and could affect the proper operation of the right daytime running lamp.

7. Can extreme weather conditions cause OBDII code B2605 to trigger in a 2014 GMC Sierra?

Extreme weather conditions can potentially impact the operation of the daytime running lamp circuit, leading to the activation of this diagnostic trouble code.

8. How do I prevent OBDII code B2605 from recurring in my 2014 GMC Sierra?

Regularly inspecting the daytime running lamp circuit for any signs of wear or damage, ensuring proper maintenance of the lighting system, and addressing any issues promptly can help prevent the recurrence of this code.

9. Will OBDII code B2605 in a 2014 GMC Sierra affect the vehicle's overall performance?

While this code specifically relates to the Right Daytime Running Lamps Control Circuit, it does not directly impact the overall performance of the vehicle. However, addressing the issue is crucial for safety and compliance.

10. Is it necessary to visit a dealership for repairs related to OBDII code B2605 in a 2014 GMC Sierra?

While a dealership may have specialized knowledge and tools for diagnosing and repairing this issue, an experienced automotive technician or electrician can also effectively address the problem with the Right Daytime Running Lamps Control Circuit.