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B3109 2014 GMC Sierra Code - Keyless Entry Transmitter 1 Battery

Quick Answer

The B3109 diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically refers to an issue with the Keyless Entry Transmitter 1 Battery. Common causes include Normal wear and tear on the keyless entry transmitter battery, Exposure to extreme temperatures that can affect battery performance, Physical damage to the key fob that impacts the battery connection. 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
B3109 2014 GMC Sierra indicates Keyless Entry Transmitter 1 Battery.
Common causes
Common causes include Normal wear and tear on the keyless entry transmitter battery, Exposure to extreme temperatures that can affect battery performance, Physical damage to the key fob that impacts the battery connection.
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 09, 2024
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Code B3109 2014 GMC Sierra Description

The B3109 diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically refers to an issue with the Keyless Entry Transmitter 1 Battery. This code indicates that there is a problem with the battery in the key fob or keyless entry transmitter for the vehicle. The key fob is an essential component of the vehicle's keyless entry system, allowing the driver to remotely lock and unlock the doors, as well as potentially perform other functions such as remote start.

OBDII Code B3109 2014 GMC Sierra - Keyless Entry Transmitter 1 Battery
B3109 2014 GMC Sierra Code - Keyless Entry Transmitter 1 Battery

Common Causes of B3109 2014 GMC Sierra

  1. Normal wear and tear on the keyless entry transmitter battery.
  2. Exposure to extreme temperatures that can affect battery performance.
  3. Physical damage to the key fob that impacts the battery connection.
  4. Faulty battery in the keyless entry transmitter.
  5. Interference from other electronic devices affecting the key fob signal.

Symptoms of B3109 2014 GMC Sierra

  1. Difficulty in locking or unlocking the doors remotely.
  2. Intermittent or inconsistent response from the keyless entry system.
  3. Inability to start the vehicle remotely.
  4. Alarm system not functioning properly.
  5. Low battery warning on the key fob display.

How to Fix B3109 2014 GMC Sierra

  1. Replace the battery in the keyless entry transmitter with a new one.
  2. Test the key fob to ensure proper functionality after battery replacement.
  3. Sync the key fob with the vehicle's keyless entry system if needed.
  4. Inspect the key fob for any physical damage that may need repair.
  5. Reset the keyless entry system if necessary to reestablish proper communication with the key fob.

Cost to Fix B3109 2014 GMC Sierra

The typical repair costs for replacing the battery in a keyless entry transmitter can vary depending on the type of battery required and any additional services needed, such as syncing the key fob with the vehicle's system. On average, the cost of a new battery for a key fob ranges from $5 to $20. Labor costs at an auto repair shop may add an additional $50 to $100, depending on the shop's hourly rates. Overall, a repair for a Keyless Entry Transmitter 1 Battery issue on a 2014 GMC Sierra may cost approximately $55 to $120, excluding any additional diagnostic or repair fees. It is advisable to consult with a professional mechanic for a more accurate cost estimate based on your specific vehicle and location.

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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 B3109 2014 GMC Sierra Code

1. What does the OBDII code B3109 mean on a 2014 GMC Sierra?

The B3109 code indicates an issue with the Keyless Entry Transmitter 1 Battery, typically due to a weak or dead battery in the key fob.

2. What are the common symptoms of the B3109 code in a 2014 GMC Sierra?

Symptoms include difficulty locking or unlocking doors remotely, problems starting the vehicle with the key fob, or a warning message about the key fob battery.

3. What causes the B3109 code to appear?

The most common cause is a depleted or weak key fob battery. Other potential causes include damage to the key fob or a malfunction in the vehicle's keyless entry system.

4. How do I fix the B3109 code on my 2014 GMC Sierra?

Replace the battery in the key fob with a new one, ensuring it is installed correctly. If the issue persists, inspect the key fob for physical damage or have the vehicle's keyless entry system checked by a professional.

5. What type of battery does the key fob for a 2014 GMC Sierra use?

The key fob typically uses a CR2032 coin cell battery. Check your owner’s manual to confirm the battery type.

6. Can I drive my 2014 GMC Sierra with the B3109 code active?

Yes, you can drive the vehicle, but features like remote locking or starting may not function properly until the issue is resolved.

7. How can I prevent the B3109 code from reoccurring?

Regularly replace the key fob battery every 1-2 years and avoid exposing the key fob to extreme temperatures or moisture.

8. How do I know if my key fob battery needs replacement?

Signs include reduced range for locking/unlocking, unresponsive buttons, or the vehicle displaying a key fob battery warning.

9. Will clearing the B3109 code fix the problem?

Clearing the code without addressing the underlying issue, such as replacing the key fob battery, will not permanently fix the problem.

10. Do I need to reprogram the key fob after replacing the battery?

No, replacing the battery typically does not require reprogramming the key fob, but consult your owner’s manual if any issues arise.

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