B127A 2015 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 2015 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 2015 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 2015 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 2015 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 2015 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 B127A 2015 GMC Sierra Code
1. What does the OBDII code B127A mean on a 2015 GMC Sierra?
The B127A code indicates an issue with the Auxiliary Video Input Signal Circuit, which is responsible for processing video input signals from external sources like cameras or entertainment systems.
2. What are the common symptoms of the B127A code in a GMC Sierra?
Symptoms may include a non-functional auxiliary video input, distorted or no video display on the infotainment screen, or error messages on the dashboard.
3. What causes the B127A code to appear?
Common causes include damaged or disconnected wiring in the auxiliary video circuit, a faulty video input module, or a software issue with the infotainment system.
4. How can I diagnose the B127A code on my GMC Sierra?
Use a diagnostic scan tool to confirm the code, then inspect the auxiliary video input wiring, connectors, and the video input module for damage or loose connections.
5. Can a software update resolve the B127A code?
In some cases, a software update for the infotainment system may resolve the issue if it is caused by a glitch or compatibility problem.
6. Is it safe to drive with the B127A code active?
Yes, it is generally safe to drive with this code active, as it does not affect the vehicle’s drivability. However, the auxiliary video input functionality may be impaired.
7. How do I fix the B127A code on a 2015 GMC Sierra?
Repair steps may include reconnecting or replacing damaged wiring, replacing the auxiliary video input module, or updating the infotainment system software.
8. How much does it cost to repair the B127A code?
Repair costs vary depending on the issue but can range from $50 for wiring repairs to $300 or more if the video input module needs replacement.
9. Can I clear the B127A code without fixing the issue?
Clearing the code with a scan tool may temporarily remove it, but the underlying issue must be resolved to prevent the code from returning.
10. Does the B127A code affect the backup camera on my GMC Sierra?
The B127A code may impact the backup camera if it is routed through the auxiliary video input circuit, causing display issues.
Discuss the causes and fixes for B127A 2015 GMC Sierra OBDII Code
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