Engine-Codes.com
Engine-Codes – GMC – B1328 2018 GMC Sierra

B1328 2018 GMC Sierra Code - Device Power Circuit High

Quick Answer

The B1328 code for a 2018 GMC Sierra refers to a Device Power Circuit High issue. Common causes include Faulty wiring harness or connectors, Short circuit in the power circuit, Failing electronic component (e.g., module, sensor). 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
B1328 2018 GMC Sierra indicates Device Power Circuit High.
Common causes
Common causes include Faulty wiring harness or connectors, Short circuit in the power circuit, Failing electronic component (e.g., module, sensor).
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 09, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1328 2018 GMC Sierra Description

The B1328 code for a 2018 GMC Sierra refers to a Device Power Circuit High issue. This means that the power circuit for a particular device in the vehicle is experiencing a higher voltage than normal, which can lead to various electrical problems. In modern vehicles like the GMC Sierra, there are numerous electronic devices and components that rely on a stable power supply to function correctly. When the power circuit for a specific device is registering a high voltage, it can disrupt the normal operation of that device and potentially affect other systems in the vehicle.

OBDII Code B1328 2018 GMC Sierra - Device Power Circuit High
B1328 2018 GMC Sierra Code - Device Power Circuit High

Common Causes of B1328 2018 GMC Sierra

  1. Faulty wiring harness or connectors
  2. Short circuit in the power circuit
  3. Failing electronic component (e.g., module, sensor)
  4. Issues with the vehicle's battery or alternator
  5. Water or moisture intrusion causing corrosion in the electrical system

Symptoms of B1328 2018 GMC Sierra

  1. Malfunctioning or inoperative electronic devices (e.g., radio, power windows, HVAC controls)
  2. Dashboard warning lights illuminated
  3. Intermittent loss of power to certain components
  4. Electrical system glitches or erratic behavior
  5. Difficulty starting the vehicle or irregular engine performance

How to Fix B1328 2018 GMC Sierra

  1. Perform a thorough inspection of the electrical system to identify the specific device and circuit affected by the high voltage issue.
  2. Check for any visible damage to wiring, connectors, or components and repair or replace as needed.
  3. Test the battery and alternator to ensure they are functioning correctly, addressing any issues if necessary.
  4. Use a multimeter to measure the voltage in the power circuit and diagnose the exact cause of the high voltage reading.
  5. Clear the diagnostic trouble codes, reset the system, and test the affected device to verify that the issue has been resolved.

Cost to Fix B1328 2018 GMC Sierra

The typical repair costs for a Device Power Circuit High issue like the B1328 code on a 2018 GMC Sierra can vary depending on the extent of the problem and the specific repairs needed. In general, the repair costs for electrical issues can range from $100 to $500 or more, including parts and labor. It is important to remember that diagnostic time and labor rates at auto repair shops can vary significantly, so it's advisable to obtain quotes from multiple sources to get an accurate estimate for your specific situation. Additionally, factors such as location, vehicle make and model, and engine type can also influence the final cost of repairs.

Need more information about the B1328 2018 GMC Sierra code?

Need more information on how to fix the B1328 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1328 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B1328 2018 GMC Sierra Code

1. What does OBDII code B1328 mean on a 2018 GMC Sierra?

Code B1328 indicates a "Device Power Circuit High" issue, meaning there is an electrical fault in the power circuit of a connected component or module.

2. What are common symptoms of code B1328 in a GMC Sierra?

Symptoms may include malfunctioning electrical components, intermittent power issues, warning lights on the dashboard, or failure of specific modules to communicate.

3. What causes the B1328 code in a 2018 GMC Sierra?

Possible causes include a short circuit, damaged wiring, corroded connectors, a faulty module, or an overvoltage condition in the circuit.

4. How is code B1328 diagnosed?

A technician will typically inspect the wiring and connectors for damage, test the power circuit for overvoltage, and use a scan tool to check for related codes or module communication errors.

5. Can I drive with the B1328 code on my GMC Sierra?

It depends on the severity of the issue. While the vehicle may still be drivable, unresolved electrical faults can lead to further component damage or safety concerns.

6. How do you fix the B1328 code on a 2018 GMC Sierra?

Repairs may include replacing damaged wiring, cleaning or replacing corroded connectors, or repairing or replacing the affected module.

7. What tools are needed to fix a B1328 code?

You may need a multimeter to test voltage, a scan tool to read and clear codes, and basic tools for accessing and repairing wiring or connectors.

8. Can a dead battery cause the B1328 code in a GMC Sierra?

Not directly, but low voltage or battery-related issues could trigger electrical faults, leading to this code. Ensure the battery and charging system are functioning properly.

9. How much does it cost to repair the B1328 code on a GMC Sierra?

Repair costs can vary widely depending on the root cause but may range from $100 for minor wiring repairs to several hundred dollars if a module replacement is necessary.

10. Is the B1328 code unique to the 2018 GMC Sierra?

No, the B1328 code can appear on other GM vehicles as well, but the specific affected circuit or module may vary by model and year. Always refer to the vehicle-specific repair manual.

Discuss the causes and fixes for B1328 2018 GMC Sierra OBDII Code

Submit a New Comment

Code B1328 2018 GMC Sierra comments

No comments found for this page.