AutoCodes – GMC – B12A4 GMC

B12A4 GMC Code - Infotainment Faceplate Control Module

Quick Answer

The radio communicates with the radio controls via serial data. Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display Module 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: B12A4 GMC indicates Infotainment Faceplate Control Module.
Common causes: Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display Module 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 314

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 B12A4 GMC Description

The radio communicates with the radio controls via serial data. This Diagnostic Trouble Code (DTC) indicates a fault in the radio controls. No external circuits are involved. The radio may continue to respond normally to faceplate functions when this DTC is set.

OBDII Code B12A4 GMC - Infotainment Faceplate Control Module - AutoCodes.com — B12A4 GMC Code - Infotainment Faceplate Control Module

What does this mean?

What are the Possible Causes of the DTC B12A4 GMC?

Faulty Info Display Module
Info Display Module harness is open or shorted
Info Display Module circuit poor electrical connection

How to Fix the DTC B12A4 GMC?

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 B12A4 GMC 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 B12A4 GMC code?

Need more information on how to fix the B12A4 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B12A4 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B12A4 2014 GMC Sierra — Infotainment Faceplate Control Module
B12A4 2015 GMC Sierra — Infotainment Faceplate Control Module
B12A4 2016 GMC Sierra — Infotainment Faceplate Control Module
B12A4 2017 GMC Sierra — Infotainment Faceplate Control Module
B12A4 2018 GMC Sierra — Infotainment Faceplate Control Module

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 B12A4 GMC Code

1. What does the OBDII code B12A4 mean on a GMC vehicle?

B12A4 indicates an issue with the Infotainment Faceplate Control Module, often related to communication or functionality problems with the faceplate buttons or controls.

2. What are the common symptoms of code B12A4 in a GMC?

Symptoms may include unresponsive or malfunctioning infotainment faceplate buttons, issues with touchscreen controls, or intermittent infotainment system failures.

3. What causes the B12A4 code to appear on a GMC?

The code can be triggered by a faulty Infotainment Faceplate Control Module, wiring issues, loose connections, or software glitches in the infotainment system.

4. How can I diagnose the B12A4 code on my GMC?

Use a scan tool to confirm the code, inspect the faceplate control module for visible damage, check for loose or damaged wiring, and ensure all connections are secure.

5. Can a software update fix the B12A4 code on my GMC?

In some cases, a software update for the infotainment system can resolve the issue if the problem stems from a glitch or outdated programming.

6. Do I need to replace the Infotainment Faceplate Control Module to fix B12A4?

Not always. First, check for loose connections or damaged wiring. If the module itself is faulty, replacement may be necessary.

7. How much does it cost to fix the B12A4 code on a GMC?

Repair costs vary. Replacing the Infotainment Faceplate Control Module can cost $200â€“$500 for parts, plus labor, depending on the model and repair shop rates.

8. Can I drive my GMC with the B12A4 code active?

Yes, but the infotainment system may not work properly, which could be inconvenient. Address the issue promptly to avoid further system problems.

9. What tools are needed to troubleshoot the B12A4 code?

You'll need an OBDII scanner, a multimeter to check wiring, and potentially access to GMC-specific service manuals for detailed diagnostics.

10. Can a dead battery cause the B12A4 code on a GMC?

Yes, a weak or dead battery can cause communication errors in the infotainment system, potentially triggering the B12A4 code. Ensure the battery is fully charged or replaced if needed.