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B1327 2015 GMC Sierra Code - Device Power 1 Circuit Low

Quick Answer

The B1327 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Device Power 1 Circuit being low. Common causes include Faulty wiring or connectors in the Device Power 1 Circuit, A malfunctioning power supply module, Issues with the battery or alternator affecting power delivery. 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
B1327 2015 GMC Sierra indicates Device Power 1 Circuit Low.
Common causes
Common causes include Faulty wiring or connectors in the Device Power 1 Circuit, A malfunctioning power supply module, Issues with the battery or alternator affecting power delivery.
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 10, 2024
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Code B1327 2015 GMC Sierra Description

The B1327 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Device Power 1 Circuit being low. This code typically suggests a problem with the power supply to a particular device in the vehicle, potentially leading to issues with the operation of various systems. In this case, the Device Power 1 Circuit is not receiving the expected voltage, which can affect the performance of electronic components and systems that rely on this power source.

OBDII Code B1327 2015 GMC Sierra - Device Power 1 Circuit Low
B1327 2015 GMC Sierra Code - Device Power 1 Circuit Low

Common Causes of B1327 2015 GMC Sierra

  1. Faulty wiring or connectors in the Device Power 1 Circuit
  2. A malfunctioning power supply module
  3. Issues with the battery or alternator affecting power delivery
  4. Damage to the electronic control module (ECM) responsible for regulating power
  5. Corrosion or poor connections in the electrical system

Symptoms of B1327 2015 GMC Sierra

  1. Inoperative radio or infotainment system
  2. Climate control system not functioning properly
  3. Warning lights on the dashboard related to electrical systems
  4. Electrical accessories not working consistently
  5. Intermittent power loss to various devices

How to Fix B1327 2015 GMC Sierra

  1. Begin by conducting a thorough inspection of the Device Power 1 Circuit, checking for any visible damage or loose connections.
  2. Test the power supply module and ECM to ensure they are functioning correctly and providing the appropriate voltage to the circuit.
  3. Check for any corrosion on the wiring or connectors and clean or replace as necessary.
  4. If no obvious issues are found, consider using a multimeter to test the voltage at various points along the circuit to pinpoint the source of the low voltage.
  5. Once the issue is identified, repair or replace the faulty components as needed to restore proper power supply to the Device Power 1 Circuit.

Cost to Fix B1327 2015 GMC Sierra

The cost of repairing a Device Power 1 Circuit low voltage issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair can range from $50 to $200, while labor costs may add an additional $100 to $300 or more. Overall, the total repair cost for this issue could be in the range of $150 to $500 or higher, depending on the specific circumstances.

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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 B1327 2015 GMC Sierra Code

1. What does the OBDII code B1327 mean on a 2015 GMC Sierra?

The code B1327 indicates a "Device Power 1 Circuit Low," meaning the vehicle's control module has detected a low voltage condition in a specific circuit.

2. What are the common symptoms of code B1327 in a 2015 GMC Sierra?

Common symptoms include malfunctioning electrical components, intermittent power issues, dashboard warning lights, or failure of certain devices to operate.

3. What causes the B1327 code to appear on a GMC Sierra?

Possible causes include a weak battery, loose or corroded wiring or connections, a faulty control module, or a blown fuse in the affected circuit.

4. How do I diagnose the B1327 code in my 2015 GMC Sierra?

Use a multimeter to check for proper voltage in the affected circuit, inspect wiring and connectors for damage or corrosion, and test the battery and alternator for proper output.

5. Can driving with the B1327 code cause further damage?

Yes, ignoring this code can lead to electrical failures, reduced functionality of certain systems, and potential damage to components reliant on proper voltage.

6. What should I do first to fix the B1327 code in a GMC Sierra?

Start by checking the battery voltage, inspecting all wiring and connectors in the involved circuit, and ensuring all grounds are secure and free of corrosion.

7. Can a bad alternator cause the B1327 code?

Yes, a failing alternator can result in low voltage, which may trigger the B1327 code. Testing the alternator output is recommended.

8. Does the B1327 code always indicate a faulty control module?

Not necessarily; while a control module fault is possible, the issue is often caused by wiring, battery, or alternator problems.

9. How much does it cost to repair the B1327 code on a 2015 GMC Sierra?

Repair costs vary depending on the cause. Common fixes like replacing corroded wiring or a bad fuse may cost $50-$100, while a new alternator or battery could cost $200-$500.

10. Can I clear the B1327 code without fixing the issue?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isn’t resolved.

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