Engine-CodesGMC – B3123 GMC

B3123 GMC Code - Keyless Entry Antenna 5

Quick Answer

The B3123 GMC code specifically refers to an issue with the Keyless Entry Antenna 5 in the vehicle. Common causes include Damaged or faulty keyless entry antenna, Wiring issues or shorts in the keyless entry system, Water damage to the antenna or surrounding components. 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
B3123 GMC indicates Keyless Entry Antenna 5.
Common causes
Common causes include Damaged or faulty keyless entry antenna, Wiring issues or shorts in the keyless entry system, Water damage to the antenna or surrounding components.
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.
Table of contents Created and updated by William Orellana on Aug 19, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B3123 GMC Description

The B3123 GMC code specifically refers to an issue with the Keyless Entry Antenna 5 in the vehicle. This means that there is a malfunction or fault detected in the keyless entry system's antenna, which is responsible for receiving signals from the key fob and allowing the vehicle to be locked, unlocked, and started without physically using a key. When this antenna is not functioning properly, it can lead to issues with the keyless entry system and potentially prevent the vehicle from starting or being accessed remotely.

OBDII Code B3123 GMC - Keyless Entry Antenna 5
B3123 GMC Code - Keyless Entry Antenna 5

Common Causes of B3123 GMC

  1. Damaged or faulty keyless entry antenna
  2. Wiring issues or shorts in the keyless entry system
  3. Water damage to the antenna or surrounding components
  4. Electronic interference affecting the antenna's signal reception
  5. Faulty key fob transmitting incorrect signals

Symptoms of B3123 GMC

  1. Key fob not working to lock or unlock the vehicle
  2. Vehicle not starting when the key fob is used
  3. Intermittent issues with the keyless entry system
  4. Inability to remotely start the vehicle
  5. Warning light on the dashboard related to the keyless entry system

How to Fix B3123 GMC

  1. Diagnose the specific cause of the issue by testing the keyless entry antenna and related components
  2. Replace the keyless entry antenna if it is found to be faulty
  3. Check and repair any damaged wiring or connections in the keyless entry system
  4. Test the key fob to ensure it is transmitting the correct signals
  5. Clear the diagnostic code and test the keyless entry system to confirm proper functionality

Cost to Fix B3123 GMC

The typical repair costs for addressing a B3123 GMC code related to the Keyless Entry Antenna 5 can range from $100 to $300, depending on the extent of the issue and the specific repairs needed. This estimate includes the cost of parts and labor. However, it's important to note that actual repair costs can vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Diagnostic time and labor rates at auto repair shops typically range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas and lower at independent shops. It's recommended to obtain a personalized estimate from a local repair shop for a more accurate cost assessment.

Need more information about the B3123 GMC code?

Need more information on how to fix the B3123 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3123 GMC 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 B3123 GMC Code

1. What are common symptoms of OBDII code B3123 GMC related to Keyless Entry Antenna 5?

The common symptoms of this code may include issues with the keyless entry system, such as the remote key fob not working or the vehicle not responding to keyless entry commands.

2. What could cause OBDII code B3123 GMC for Keyless Entry Antenna 5?

This code is typically triggered by a malfunction in the keyless entry antenna located in the vehicle, which could be due to a faulty antenna, wiring issue, or a problem with the keyless entry module.

3. How can I diagnose the cause of OBDII code B3123 GMC for Keyless Entry Antenna 5?

Diagnosing this code usually involves checking the keyless entry antenna for any visible damage, inspecting the wiring connections, and using a diagnostic scan tool to pinpoint the exact issue within the keyless entry system.

4. Can I repair OBDII code B3123 GMC related to Keyless Entry Antenna 5 myself?

Depending on your automotive repair skills, you may be able to repair this code yourself by replacing the keyless entry antenna, fixing any wiring issues, or resetting the keyless entry system. However, professional diagnosis and repair might be necessary for complex problems.

5. Is it safe to continue driving with OBDII code B3123 GMC for Keyless Entry Antenna 5?

While the vehicle should still be operational with this code, it's recommended to address the underlying issue promptly to ensure the proper functioning of the keyless entry system and to prevent any inconvenience or security concerns.

6. Will resetting the OBDII code B3123 GMC resolve the Keyless Entry Antenna 5 issue?

Resetting the code may temporarily clear the fault, but if the root cause, such as a faulty keyless entry antenna, is not addressed, the code is likely to reappear. It's essential to diagnose and fix the underlying problem for a lasting solution.

7. How much does it typically cost to repair OBDII code B3123 GMC for Keyless Entry Antenna 5?

The cost of repairing this code can vary depending on the specific issue, labor rates, and parts needed. Simple fixes like reconnecting wiring may be inexpensive, while replacing the keyless entry antenna or module could be more costly.

8. Can extreme weather conditions affect OBDII code B3123 GMC related to Keyless Entry Antenna 5?

Extreme temperatures or moisture exposure can potentially impact the performance of the keyless entry antenna and lead to the triggering of this code. Taking preventive measures, such as protecting the antenna from harsh weather, may help prevent future issues.

9. Are there any recalls or technical service bulletins related to OBDII code B3123 GMC for Keyless Entry Antenna 5?

It's advisable to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code. This information can provide insights into known issues and recommended solutions.

10. How long does it take to repair OBDII code B3123 GMC for Keyless Entry Antenna 5?

The repair time for this code can vary based on the complexity of the issue and the availability of parts. Simple fixes may take a short time, while more involved repairs could require several hours or even a day at a repair shop.

Discuss the causes and fixes for B3123 GMC OBDII Code

Code B3123 GMC comments

No comments found for this page.