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Engine-Codes – GMC – B123E 2015 GMC Sierra

B123E 2015 GMC Sierra Code - Radio Keypad Button Signal Circuit

Quick Answer

The B123E diagnostic trouble code (DTC) specifically relates to the Radio Keypad Button Signal Circuit in a 2015 GMC Sierra. Common causes include Faulty radio keypad buttons, Wiring issues in the signal circuit, Loose or corroded electrical connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B123E 2015 GMC Sierra indicates Radio Keypad Button Signal Circuit.
Common causes
Common causes include Faulty radio keypad buttons, Wiring issues in the signal circuit, Loose or corroded electrical connections.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B123E 2015 GMC Sierra Description

The B123E diagnostic trouble code (DTC) specifically relates to the Radio Keypad Button Signal Circuit in a 2015 GMC Sierra. This code indicates that there is a malfunction in the circuit responsible for transmitting signals from the radio keypad buttons to the vehicle's electronic control unit (ECU). The radio keypad buttons are used to control various functions such as changing radio stations, adjusting volume, and accessing different audio sources.

OBDII Code B123E 2015 GMC Sierra - Radio Keypad Button Signal Circuit
B123E 2015 GMC Sierra Code - Radio Keypad Button Signal Circuit

Common Causes of B123E 2015 GMC Sierra

  1. Faulty radio keypad buttons.
  2. Wiring issues in the signal circuit.
  3. Loose or corroded electrical connections.
  4. ECU malfunction.
  5. Water damage to the radio keypad area.

Symptoms of B123E 2015 GMC Sierra

  1. Radio buttons not responding to inputs.
  2. Inability to change radio stations or audio sources.
  3. Volume control not functioning properly.
  4. Illumination of the radio keypad buttons may be erratic or non-functional.

How to Fix B123E 2015 GMC Sierra

  1. Begin by inspecting the radio keypad buttons for any visible damage or wear. Replace any faulty buttons.
  2. Check the wiring in the signal circuit for any breaks, frays, or damage. Repair or replace any damaged wiring.
  3. Inspect all electrical connections related to the radio keypad circuit for looseness or corrosion. Clean or tighten connections as needed.
  4. If the issue persists, diagnose the ECU for any malfunctions related to receiving signals from the radio keypad. Replace the ECU if necessary.
  5. Ensure that the radio keypad area is free from any water damage that could be affecting the circuit. Address any water leaks or damage in the area.

Cost to Fix B123E 2015 GMC Sierra

The typical repair costs for addressing the B123E DTC in a 2015 GMC Sierra can vary depending on the specific cause of the issue. Generally, the cost of replacing faulty radio keypad buttons, repairing wiring, and addressing electrical connections can range from $150 to $500. If the ECU needs to be replaced, the cost can increase significantly. It is advisable to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair needed. Keep in mind that labor rates at auto repair shops can vary, so it's recommended to check local rates for a more precise estimate.

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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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B123E in a 2015 GMC Sierra related to the Radio Keypad Button Signal Circuit?

- Common symptoms include malfunctioning radio keypad buttons, unresponsive controls, and error messages on the display screen.

2. What can cause the OBDII code B123E to trigger in a 2015 GMC Sierra?

- The code B123E is typically triggered by a fault in the radio keypad button signal circuit, which can be caused by wiring issues, a faulty keypad, or a problem with the radio unit itself.

3. How can I diagnose the OBDII code B123E in my 2015 GMC Sierra?

- Diagnosing the code B123E involves checking the wiring connections, inspecting the radio keypad buttons for physical damage, and using a diagnostic scanner to pinpoint the exact issue in the signal circuit.

4. Is it safe to continue driving my 2015 GMC Sierra with the OBDII code B123E present?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent further damage or inconvenience.

5. Can I repair the OBDII code B123E in my 2015 GMC Sierra myself?

- Depending on your skill level and access to tools, you may be able to repair the code B123E yourself by troubleshooting the wiring, replacing the faulty keypad, or seeking professional help for complex repairs.

6. How much does it typically cost to fix the OBDII code B123E in a 2015 GMC Sierra?

- The cost of fixing the code B123E can vary depending on the exact cause of the issue, but it may involve expenses for replacement parts, labor costs, and diagnostic fees.

7. Are there any preventative measures I can take to avoid the OBDII code B123E in my 2015 GMC Sierra?

- To prevent the code B123E, you can periodically inspect the radio keypad buttons for wear or damage, avoid spilling liquids on the keypad, and address any electrical issues promptly.

8. Can the OBDII code B123E affect other systems in my 2015 GMC Sierra?

- While the code B123E specifically relates to the radio keypad button signal circuit, electrical issues in one part of the vehicle can sometimes have secondary effects on other systems, so it's essential to address the problem promptly.

9. Will resetting the OBDII system clear the B123E code in my 2015 GMC Sierra?

- Resetting the OBDII system may temporarily clear the code B123E, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

10. How long does it typically take to repair the OBDII code B123E in a 2015 GMC Sierra?

- The repair time for the code B123E can vary depending on the complexity of the issue and the availability of parts, but it may range from a few hours to a day at a repair shop.

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