AutoCodes – GMC – B123E 2014 GMC Sierra

B123E 2014 GMC Sierra Code - Radio Keypad Button Signal Circuit

Quick Answer

The radio controls communicate radio control inputs directly to the radio through a discrete circuit for volume up, volume down, and power button. Common causes include Faulty Radio Controls, Radio Controls harness is open or shorted, Radio Controls 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: B123E 2014 GMC Sierra indicates Radio Keypad Button Signal Circuit.
Common causes: Common causes include Faulty Radio Controls, Radio Controls harness is open or shorted, Radio Controls 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 170

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 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B123E 2014 GMC Sierra Description

The radio controls communicate radio control inputs directly to the radio through a discrete circuit for volume up, volume down, and power button. It also uses a series of resistors through a signal circuit when the home, seek up, seek down and phone buttons are pressed. After receiving the message, the radio will perform the requested function. Messages communicated between the radio and the radio controls include the following: Button presses/knob rotations, Commands for the state of indicators, and Controls back-lighting. The Diagnostic Trouble Code (DTC) will be set when the radio detects an open/high resistance, short to voltage, or short to ground on the radio controls key signal circuit.

OBDII Code B123E 2014 GMC Sierra - Radio Keypad Button Signal Circuit - AutoCodes.com — B123E 2014 GMC Sierra Code - Radio Keypad Button Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B123E 2014 GMC Sierra?

Faulty Radio Controls
Radio Controls harness is open or shorted
Radio Controls circuit poor electrical connection
Faulty Radio

How to Fix the DTC B123E 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 B123E 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 B123E 2014 GMC Sierra code?

Need more information on how to fix the B123E 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B123E 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B123E 2014 GMC Sierra Code

1. What does the OBDII code B123E mean on a 2014 GMC Sierra?

B123E refers to an issue in the Radio Keypad Button Signal Circuit, indicating that the vehicle's radio or infotainment system is not receiving proper input signals from the keypad buttons.

2. What are common symptoms of the B123E code on a 2014 GMC Sierra?

Symptoms may include unresponsive radio buttons, difficulty controlling the infotainment system, or erratic behavior when pressing keypad buttons.

3. What causes the B123E code to appear in a 2014 GMC Sierra?

Potential causes include a faulty radio keypad, damaged wiring or connectors in the keypad circuit, or a malfunctioning radio control module.

4. How can I diagnose the B123E code on my 2014 GMC Sierra?

Start by inspecting the radio keypad and its wiring for visible damage, then use a diagnostic scanner to check for related codes. Test circuit continuity and ensure proper connections.

5. Can I still use my radio if the B123E code is active?

In some cases, the radio may still work, but certain keypad functions may be limited or unresponsive until the issue is resolved.

6. How do you fix the B123E code on a 2014 GMC Sierra?

Repairs may involve replacing the faulty keypad, repairing damaged wiring, or reprogramming or replacing the radio control module if necessary.

7. Is the B123E code a serious issue?

While it doesnâ€™t typically affect vehicle performance, it can be an annoyance and impact usability of the radio or infotainment system.

8. What tools are needed to troubleshoot the B123E code?

Youâ€™ll need a diagnostic scanner, a multimeter to check for continuity, and potentially wiring diagrams for the radio keypad circuit.

9. Can a software update fix the B123E code on a 2014 GMC Sierra?

In some cases, a software update to the radio control module may resolve the issue if itâ€™s caused by a software glitch.

10. Should I take my 2014 GMC Sierra to a mechanic for the B123E code?

If youâ€™re unable to diagnose or repair the issue yourself, itâ€™s best to take the vehicle to a qualified technician with experience in electrical and infotainment systems.