AutoCodes – GMC – B3109 2016 GMC Sierra

B3109 2016 GMC Sierra Code - Keyless Entry Transmitter 1 Battery

Quick Answer

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the Remote Control Door Lock Receiver (RCDLR), along with the commanded keyless entry function. Common causes include Low Keyless Entry Transmitter Battery, Faulty Keyless Entry Transmitter. 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 2016 GMC Sierra indicates Keyless Entry Transmitter 1 Battery.
Common causes: Common causes include Low Keyless Entry Transmitter Battery, Faulty Keyless Entry Transmitter.
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.

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Code Popularity 250

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3109 2016 GMC Sierra Description

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the Remote Control Door Lock Receiver (RCDLR), along with the commanded keyless entry function. The Remote Control Door Lock Receiver sends this to the Body Control Module (BCM) to perform the requested function. The Diagnostic Trouble Code (DTC) sets when three consecutive low-battery signals are received from the same transmitter.

OBDII Code B3109 2016 GMC Sierra - Keyless Entry Transmitter 1 Battery - AutoCodes.com — B3109 2016 GMC Sierra Code - Keyless Entry Transmitter 1 Battery

What does this mean?

What are the Possible Causes of the DTC B3109 2016 GMC Sierra?

Low Keyless Entry Transmitter Battery
Faulty Keyless Entry Transmitter

How to Fix the DTC B3109 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 B3109 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 B3109 2016 GMC Sierra code?

Need more information on how to fix the B3109 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3109 2016 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 B3109 2016 GMC Sierra Code

1. What does OBDII code B3109 for a 2016 GMC Sierra indicate?

Code B3109 specifically relates to the Keyless Entry Transmitter 1 Battery in a 2016 GMC Sierra.

2. What are some common symptoms of OBDII code B3109 in a 2016 GMC Sierra?

Common symptoms include issues with the keyless entry system, such as the remote not working or needing to be pressed multiple times to unlock the vehicle.

3. What are possible causes of OBDII code B3109 in a 2016 GMC Sierra?

The most common cause is a weak or dead battery in the keyless entry transmitter. Other causes could include a faulty transmitter or issues with the vehicle's receiver.

4. How can I diagnose the OBDII code B3109 in my 2016 GMC Sierra?

To diagnose this code, start by replacing the battery in the keyless entry transmitter. If the issue persists, consider testing the transmitter's functionality or seeking professional help.

5. Can I repair OBDII code B3109 in a 2016 GMC Sierra myself?

Yes, replacing the battery in the keyless entry transmitter is a simple DIY repair. If the issue persists after replacing the battery, you may need to consult a professional for further diagnosis.

6. How often should I replace the battery in the keyless entry transmitter of my 2016 GMC Sierra?

It is recommended to replace the battery in the keyless entry transmitter every 1-2 years or when you notice a decrease in range or functionality.

7. Are there any tips to extend the battery life of the keyless entry transmitter in my 2016 GMC Sierra?

To extend battery life, avoid keeping the transmitter near electronic devices that may interfere with its signal, and store it in a cool, dry place when not in use.

8. Will OBDII code B3109 affect the overall performance of my 2016 GMC Sierra?

While the code itself does not directly impact the vehicle's performance, it can be inconvenient if the keyless entry system is not functioning properly.

9. Can OBDII code B3109 cause any safety concerns in my 2016 GMC Sierra?

There are no direct safety concerns associated with this code, but a malfunctioning keyless entry system could lead to inconvenience or potential security issues.

10. Is it necessary to clear OBDII code B3109 from the system after replacing the keyless entry transmitter battery in my 2016 GMC Sierra?

After replacing the battery and resolving the issue, you can clear the code using an OBDII scanner to ensure it does not trigger any false alerts in the future.