AutoCodes – Chevrolet – B256B 2014 Chevrolet Silverado

B256B 2014 Chevrolet Silverado Code - Cargo Lamps Switch Circuit Malfunction

Quick Answer

The cargo lamp relay is always supplied with battery voltage. Common causes include Faulty Cargo Lamps Switch, Cargo Lamps Switch harness is open or shorted, Cargo Lamps 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: B256B 2014 Chevrolet Silverado indicates Cargo Lamps Switch Circuit Malfunction.
Common causes: Common causes include Faulty Cargo Lamps Switch, Cargo Lamps Switch harness is open or shorted, Cargo Lamps 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.

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Code Popularity 219

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
Cost to Diagnose
FAQs
Comments
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Code B256B 2014 Chevrolet Silverado Description

The cargo lamp relay is always supplied with battery voltage. The cargo lamp switch signal circuit is grounded momentarily by pressing the cargo lamp switch. The Body Control Module (BCM) energizes the cargo lamp relay by applying ground to the cargo lamp relay control circuit. When the cargo lamp relay is energized, the relay switch contacts close, and battery voltage is applied through the F9DR fuse to the cargo lamp control circuit which illuminates the cargo lamps. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground in the cargo lamp switch signal circuit.

OBDII Code B256B 2014 Chevrolet Silverado - Cargo Lamps Switch Circuit Malfunction - AutoCodes.com — B256B 2014 Chevrolet Silverado Code - Cargo Lamps Switch Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B256B 2014 Chevrolet Silverado?

Faulty Cargo Lamps Switch
Cargo Lamps Switch harness is open or shorted
Cargo Lamps Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B256B 2014 Chevrolet Silverado?

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 B256B 2014 Chevrolet Silverado 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 B256B 2014 Chevrolet Silverado 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 B256B 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B256B in a 2014 Chevrolet Silverado related to Cargo Lamps Switch Circuit Malfunction?

- Common symptoms include malfunctioning cargo lamps, flickering or dim lights, or a complete loss of cargo lamp function.

2. What causes the Cargo Lamps Switch Circuit Malfunction code B256B in a 2014 Chevrolet Silverado?

- This code is typically triggered by a faulty cargo lamp switch, damaged wiring, a blown fuse, or a malfunctioning cargo lamp control module.

3. How can I diagnose the Cargo Lamps Switch Circuit Malfunction in my 2014 Chevrolet Silverado?

- You can start by visually inspecting the cargo lamp switch, checking the wiring for any visible damage, testing the fuse related to the cargo lamps, and using a diagnostic scanner to identify the specific issue.

4. Is it safe to continue driving my 2014 Chevrolet Silverado with OBDII code B256B active?

- While the vehicle should still be safe to drive, it's recommended to address the issue promptly to ensure proper cargo lamp functionality and prevent potential electrical problems.

5. Can I repair the Cargo Lamps Switch Circuit Malfunction code B256B in my 2014 Chevrolet Silverado myself?

- Depending on your experience and tools, you may be able to repair this issue yourself by replacing the faulty cargo lamp switch, repairing damaged wiring, or addressing any other identified issues causing the malfunction.

6. How much does it typically cost to fix OBDII code B256B in a 2014 Chevrolet Silverado at a repair shop?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from around $100 to $300 for parts and labor.

7. Are there any common DIY solutions to try before taking my 2014 Chevrolet Silverado to a mechanic for code B256B?

- You can start by checking and replacing any blown fuses related to the cargo lamps, inspecting the cargo lamp switch for damage, and ensuring all wiring connections are secure and free of corrosion.

8. Will resetting the OBDII code B256B in my 2014 Chevrolet Silverado make the issue go away?

- Resetting the code may temporarily turn off the warning light, but it won't fix the underlying problem causing the Cargo Lamps Switch Circuit Malfunction. It's important to diagnose and address the issue to prevent it from recurring.

9. Can extreme weather conditions or rough terrain contribute to triggering code B256B in a 2014 Chevrolet Silverado?

- While extreme conditions can potentially exacerbate existing issues, the root cause of the Cargo Lamps Switch Circuit Malfunction code is typically related to component failure or wiring issues rather than external factors.

10. How long does it usually take to repair OBDII code B256B related to Cargo Lamps Switch Circuit Malfunction in a 2014 Chevrolet Silverado?

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