AutoCodes – GMC – B127E 2014 GMC Sierra

B127E 2014 GMC Sierra Code - Front Video Display Output Signal Malfunction

Quick Answer

The infotainment display and controls are separate components from the radio, combined into an assembly. Common causes include Faulty Front Video Display, Front Video Display harness is open or shorted, Front Video Display circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B127E 2014 GMC Sierra indicates Front Video Display Output Signal Malfunction.
Common causes: Common causes include Faulty Front Video Display, Front Video Display harness is open or shorted, Front Video Display circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 313

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B127E 2014 GMC Sierra Description

The infotainment display and controls are separate components from the radio, combined into an assembly. The assembly is supplied with battery voltage and ground from the vehicle harness. The Human Machine Interface Control Module communicates digital video data for an on-screen display through a dedicated cable containing the Low Voltage Differential Signaling (LVDS) data circuits.
Control information, touch communications, and dimming level for the display are communicated via a LIN serial data circuit to the Human Machine Interface Control Module.
If the Human Machine Interface Control Module detects the display is not responding to the output on the LVDS circuits, the Human Machine Interface Control Module sets the Diagnostic Trouble Code (DTC).

OBDII Code B127E 2014 GMC Sierra - Front Video Display Output Signal Malfunction - AutoCodes.com — B127E 2014 GMC Sierra Code - Front Video Display Output Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC B127E 2014 GMC Sierra?

Faulty Front Video Display
Front Video Display harness is open or shorted
Front Video Display circuit poor electrical connection
Faulty Low Voltage Differential Signaling (LVDS) Cable

How to Fix the DTC B127E 2014 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 B127E 2014 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 B127E 2014 GMC Sierra 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 B127E 2014 GMC Sierra Code

1. What does the OBDII code B127E mean on a 2014 GMC Sierra?

B127E indicates a Front Video Display Output Signal Malfunction, meaning thereâ€™s an issue with the video signal transmitted to the display screen.

2. What are the common symptoms of the B127E code in a 2014 GMC Sierra?

Symptoms may include a blank or distorted screen on the infotainment display, loss of camera feed, or unresponsive display controls.

3. What causes the B127E code to appear?

The code is often triggered by wiring issues, a faulty video display module, a damaged screen, or a poor connection between the video source and display.

4. How can I diagnose the B127E code in my GMC Sierra?

Start by checking the wiring and connectors for damage or looseness, inspect the video display module for faults, and test the screen for proper functionality.

5. Can a software issue cause the B127E code?

Yes, outdated or corrupted infotainment system software can sometimes cause this code, requiring a software update.

6. Is it safe to continue driving with the B127E code?

Yes, the code doesnâ€™t affect drivability, but it may impact features like the backup camera, which could pose a safety concern.

7. How do I fix the B127E code on a 2014 GMC Sierra?

Repairs may include fixing or replacing damaged wiring, cleaning or securing connectors, updating infotainment software, or replacing the video display module.

8. How much does it cost to repair the B127E code?

Repair costs can vary widely, ranging from $50 for simple wiring fixes to $1,000 or more if the video display module or screen needs replacement.

9. Can I clear the B127E code without repairing the issue?

Clearing the code with a scan tool is possible, but it will likely return unless the root cause of the malfunction is addressed.

10. Should I take my GMC Sierra to a professional for the B127E code?

If basic troubleshooting doesnâ€™t resolve the issue, itâ€™s recommended to visit a professional technician with experience in GMC infotainment systems for further diagnosis.