AutoCodes – GMC – B123E 2016 GMC Sierra

B123E 2016 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 2016 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.

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Code Popularity 145

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
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Code B123E 2016 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 2016 GMC Sierra - Radio Keypad Button Signal Circuit - AutoCodes.com — B123E 2016 GMC Sierra Code - Radio Keypad Button Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B123E 2016 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 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the B123E 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 B123E 2016 GMC Sierra Code

1. What does the OBDII code B123E mean on a 2016 GMC Sierra?

B123E indicates a fault in the Radio Keypad Button Signal Circuit, which is responsible for transmitting button press signals from the radio keypad to the vehicle's control module.

2. What are the common symptoms of the B123E code in a 2016 GMC Sierra?

Symptoms may include unresponsive radio buttons, inability to control radio functions, or intermittent operation of the radio keypad.

3. What causes the B123E code to appear?

The code can be triggered by a faulty radio keypad, damaged wiring or connectors in the signal circuit, or a malfunctioning radio control module.

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

Start by inspecting the radio keypad and its wiring for visible damage or loose connections. Use a diagnostic scanner to verify the code and check for related issues in the system.

5. Can a faulty radio keypad cause the B123E code?

Yes, a defective radio keypad can prevent proper signal transmission, leading to the B123E code.

6. Is it safe to drive with the B123E code active?

Yes, the code does not affect the vehicle's safety or drivability, but it may impair radio functionality and convenience.

7. What repairs are needed to fix the B123E code on a 2016 GMC Sierra?

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

8. How much does it cost to fix the B123E code on a GMC Sierra?

Repair costs can range from $50 to $500, depending on whether the issue is a simple wiring repair or requires replacing the radio control module.

9. Can I clear the B123E code without repairing anything?

Clearing the code without addressing the underlying issue will likely result in the code returning. Proper diagnosis and repair are necessary.

10. Do I need professional help to fix the B123E code?

If you're comfortable working with electrical circuits, you can attempt basic troubleshooting. However, for complex issues like module replacement or reprogramming, professional assistance is recommended.