B127E 2016 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 2016 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.
Code B127E 2016 GMC Sierra Description
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).
What are the Possible Causes of the DTC B127E 2016 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 2016 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 2016 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.
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Frequently Asked Questions about B127E 2016 GMC Sierra Code
1. What does the OBDII code B127E mean on a 2016 GMC Sierra?
The code B127E indicates a "Front Video Display Output Signal Malfunction," meaning there is an issue with the video signal between the front display and the associated control module.
2. What are the common symptoms of the B127E code?
Symptoms include the front infotainment screen not displaying properly, flickering, being blank, or showing distorted images.
3. What causes the B127E code to appear?
Common causes include faulty wiring or connectors, a malfunctioning front video display, a defective video processing module, or software issues in the infotainment system.
4. Can a loose connection trigger the B127E code?
Yes, loose or corroded wiring or connectors between the display and control module can cause the code to appear.
5. How can I troubleshoot the B127E code on my GMC Sierra?
Start by inspecting the wiring and connections for damage or corrosion. If no issues are found, check the display and the associated control module for faults.
6. Can a software update fix the B127E code?
In some cases, updating the infotainment system software can resolve the issue if it is caused by a software glitch.
7. Does a faulty front video display always need replacement?
Not always. The display should be tested to confirm it is defective before replacing it, as the issue could also lie in the wiring or control module.
8. What tools are needed to diagnose the B127E code?
A scan tool capable of reading manufacturer-specific codes and testing the infotainment system is necessary for proper diagnosis.
9. Is the B127E code a serious issue?
While it doesn't affect vehicle drivability, it impacts the functionality of the infotainment system, which could be inconvenient for the driver.
10. How much does it cost to fix the B127E code?
Repair costs vary depending on the cause, ranging from $50–$150 for wiring repairs to $500 or more for replacing the display or control module.
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