AutoCodes – GMC – B260D GMC

B260D GMC Code - Left Daytime Running Lamps Control Circuit

Quick Answer

The ambient light sensor is used to monitor outside lighting conditions. Common causes include Faulty Left Daytime Running Lamps, Left Daytime Running Lamps harness is open or shorted, Left Daytime Running Lamps 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: B260D GMC indicates Left Daytime Running Lamps Control Circuit.
Common causes: Common causes include Faulty Left Daytime Running Lamps, Left Daytime Running Lamps harness is open or shorted, Left Daytime Running Lamps 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 684

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 29, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B260D GMC 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 V depending on outside lighting conditions. The Body Control Module (BCM) provides a 5 V reference signal to the ambient light sensor and the Heating, Ventilation, and Air Conditioning (HVAC) 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 lamps or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the designated daytime running lamps 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 daytime running lamps operation. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem in the left park/daytime running lamp control circuit.

OBDII Code B260D GMC - Left Daytime Running Lamps Control Circuit - AutoCodes.com — B260D GMC Code - Left Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B260D GMC?

Faulty Left Daytime Running Lamps
Left Daytime Running Lamps harness is open or shorted
Left Daytime Running Lamps circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B260D GMC?

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 B260D GMC 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 B260D GMC code?

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Information for Specific GMC Models

B260D 2014 GMC Sierra — Left Daytime Running Lamps Control Circuit
B260D 2015 GMC Sierra — Left Daytime Running Lamps Control Circuit
B260D 2016 GMC Sierra — Left Daytime Running Lamps Control Circuit
B260D 2017 GMC Sierra — Left Daytime Running Lamps Control Circuit
B260D 2018 GMC Sierra — Left Daytime Running Lamps Control Circuit

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 B260D GMC Code

1. What are the common symptoms of OBDII code B260D GMC related to the Left Daytime Running Lamps Control Circuit?

- The common symptoms include the left daytime running lamp not functioning properly or remaining constantly on or off.

2. What are the possible causes of OBDII code B260D GMC for the Left Daytime Running Lamps Control Circuit?

- Common causes include a faulty daytime running lamp module, wiring issues, a defective light sensor, or a malfunctioning body control module.

3. How can I diagnose OBDII code B260D GMC for the Left Daytime Running Lamps Control Circuit?

- Diagnosis typically involves checking the wiring connections, inspecting the daytime running lamp module, testing the light sensor, and scanning the vehicle's computer for the specific fault code.

4. Can I still drive my vehicle with OBDII code B260D GMC triggered for the Left Daytime Running Lamps Control Circuit?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper functionality of the left daytime running lamp.

5. How do I repair OBDII code B260D GMC for the Left Daytime Running Lamps Control Circuit?

- Repair may involve replacing the faulty daytime running lamp module, repairing any damaged wiring, replacing the light sensor, or reprogramming the body control module if necessary.

6. Are there any DIY tips for troubleshooting OBDII code B260D GMC related to the Left Daytime Running Lamps Control Circuit?

- DIY tips may include visually inspecting the wiring for any visible damage, checking the fuse related to the daytime running lamps, and ensuring the bulbs are in good condition.

7. Is it possible for other issues to trigger OBDII code B260D GMC for the Left Daytime Running Lamps Control Circuit?

- While rare, other electrical issues within the vehicle's lighting system or control modules could potentially trigger this code, so a thorough diagnosis is recommended.

8. How long does it typically take to repair OBDII code B260D GMC for the Left Daytime Running Lamps Control Circuit?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 30 minutes to a few hours to diagnose and resolve the problem.

9. Will resetting the OBDII system clear the B260D GMC code for the Left Daytime Running Lamps Control Circuit?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return after driving the vehicle for some time.

10. Can extreme weather conditions affect the triggering of OBDII code B260D GMC related to the Left Daytime Running Lamps Control Circuit?

- Extreme weather conditions, such as heavy rain or snow, could potentially exacerbate existing issues with the daytime running lamp circuit, leading to the triggering of this code.