B127A 2014 GMC Sierra Code - Auxiliary Video Input Signal Circuit
Quick Answer
The rear seat entertainment system has an auxiliary input assembly that contains a USB port, an SD card reader, RCA-type audio/video jacks, and a wired headphone jack with volume control. Common causes include Faulty Audio/Video Input Adapter, Audio/Video Input Adapter harness is open or shorted, Audio/Video Input Adapter 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
- B127A 2014 GMC Sierra indicates Auxiliary Video Input Signal Circuit.
- Common causes
- Common causes include Faulty Audio/Video Input Adapter, Audio/Video Input Adapter harness is open or shorted, Audio/Video Input Adapter 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 B127A 2014 GMC Sierra Description
The USB port and SD card reader slot interface with a hub device, internal to the assembly. The assembly receives fused battery voltage and ground from the harness to power the internal hub device as well as provide additional amperage to power USB devices.
The internal hub device interfaces directly with the disc player via a standard USB cable. A Mini-type USB connector is used to connect the cable to the disc player and the auxiliary input assembly. Mini-type USB male-to-female connections are used for connecting USB cables together where an in-line connection is required. An in-line cable connection is typically found between the console and the I/P harness.
The USB port allows connectivity to the rear seat entertainment system from portable media players or a USB storage device (memory stick/ flash drive). The rear seat entertainment uses the SD card reader as a mass storage device, like a USB storage device.
Once a supported device is connected to the USB port or SD card reader, the device may be sourced to one or both of the rear displays using the remote control.
What are the Possible Causes of the DTC B127A 2014 GMC Sierra?
- Faulty Audio/Video Input Adapter
- Audio/Video Input Adapter harness is open or shorted
- Audio/Video Input Adapter circuit poor electrical connection
- Faulty Media Disc Player
How to Fix the DTC B127A 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 B127A 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 B127A 2014 GMC Sierra code?
Need more information on how to fix the B127A 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B127A 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B127A 2014 GMC Sierra Code
1. What does the OBDII code B127A mean on a 2014 GMC Sierra?
B127A refers to an issue with the Auxiliary Video Input Signal Circuit, indicating a fault in the video input system or its wiring.
2. What are common symptoms of the B127A code?
Symptoms may include a non-functional auxiliary video input, a blank screen on the infotainment display, or error messages related to video playback.
3. What causes the B127A code to appear?
Common causes include damaged wiring, a faulty auxiliary video input port, a malfunctioning infotainment system, or poor connections in the video signal circuit.
4. How can I diagnose the B127A code?
Start by inspecting the wiring and connectors for the auxiliary video input. Check for loose connections, damaged wires, or corrosion, and verify the infotainment system’s functionality.
5. Can a software update fix the B127A code?
In some cases, a software update for the infotainment system may resolve compatibility or communication issues causing the code.
6. How do I repair a B127A code on a 2014 GMC Sierra?
Repairs may involve fixing or replacing damaged wires, cleaning corroded connectors, replacing the auxiliary video input port, or reprogramming the infotainment system.
7. Is the B127A code a serious issue?
While it doesn’t affect the vehicle’s drivability, it can disrupt the use of auxiliary video features, which may be inconvenient for passengers.
8. Can I clear the B127A code without making repairs?
Clearing the code without addressing the underlying issue is not recommended, as the problem will likely recur.
9. How much does it cost to fix the B127A code?
Repair costs can vary depending on the issue, ranging from $50 for minor wiring repairs to $500+ if the infotainment system or auxiliary input needs replacement.
10. Can a damaged infotainment system cause the B127A code?
Yes, a malfunctioning infotainment system can fail to process the auxiliary video input properly, triggering the code.
Discuss the causes and fixes for B127A 2014 GMC Sierra OBDII Code
Code B127A 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
