AutoCodes – Generic – B12A4:39

B12A4:39 Code - Infotainment Faceplate Control Module Internal Electronic Failure

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: B12A4:39 indicates Infotainment Faceplate Control Module Internal Electronic Failure.
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 306

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 B12A4:39 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 B12A4:39 - Infotainment Faceplate Control Module Internal Electronic Failure - AutoCodes.com — B12A4:39 Code - Infotainment Faceplate Control Module Internal Electronic Failure

What does this mean?

What are the Possible Causes of the DTC B12A4:39?

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

How to Fix the DTC B12A4:39?

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 B12A4:39 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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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 B12A4:39 Code

What does the OBDII code B12A4:39 mean?

The code B12A4:39 indicates an internal electronic failure in the infotainment faceplate control module, typically related to a malfunction in its circuits or components.

What are the common symptoms of the B12A4:39 code?

Common symptoms include an unresponsive infotainment system, malfunctioning buttons or touch controls, or the infotainment screen not powering on.

What causes the B12A4:39 code to appear?

The code can be caused by internal hardware failure, software glitches in the infotainment system, loose or damaged wiring, or power supply issues to the control module.

Can I still drive my vehicle with the B12A4:39 code?

Yes, you can still drive the vehicle, but the infotainment system may not function properly, which could affect convenience features like navigation, audio, or climate controls.

How do I diagnose the B12A4:39 code?

Diagnosing this code typically involves scanning the vehicle with an OBDII tool, inspecting the wiring and connections to the infotainment system, and testing the control module for proper operation.

Can the B12A4:39 code be fixed without replacing the control module?

In some cases, the issue may be resolved by checking and repairing wiring, updating the system software, or performing a reset. If the hardware is damaged, replacement is likely needed.

How much does it cost to repair the B12A4:39 code?

Repair costs can vary widely depending on whether the issue is a simple wiring repair or requires replacing the infotainment faceplate control module, which may range from $200 to $1,000 or more.

Can a software update fix the B12A4:39 code?

Yes, if the issue is related to a software glitch, updating the infotainment system's firmware may resolve the problem.

Is the B12A4:39 code common in all vehicles?

No, this code is specific to certain vehicle makes and models with advanced infotainment systems, and its occurrence depends on the design and reliability of the system.

Do I need a dealer to fix the B12A4:39 code?

Not necessarily. While some diagnostics and repairs may require dealer-specific tools, an experienced mechanic or specialized repair shop may also be able to address the issue.