AutoCodes – GMC – B1328 2018 GMC Sierra

B1328 2018 GMC Sierra Code - Device Power Circuit High

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Battery voltage, Faulty Control Module, Control Module harness is open or shorted. 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 Battery voltage, Faulty Control Module, Control Module harness is open or shorted.
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 198

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 Jul 08, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1328 2018 GMC Sierra Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Damage to components, and incorrect data can occur when the voltage is out of range. The vehicle has multiple Control Modules that will set this Diagnostic Trouble Code (DTC).

OBDII Code B1328 2018 GMC Sierra - Device Power Circuit High - AutoCodes.com — B1328 2018 GMC Sierra Code - Device Power Circuit High

What does this mean?

What are the Possible Causes of the DTC B1328 2018 GMC Sierra?

Battery voltage
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC B1328 2018 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1328 2018 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 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.