AutoCodes – GMC – B3105 GMC

B3105 GMC Code - Keyless Entry Transmitters

Quick Answer

The Body Control Module (BCM) monitors the number of keyless entry transmitters programmed. Common causes include Faulty Keyless Entry Transmitters, Faulty Body Control Module (BCM). 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: B3105 GMC indicates Keyless Entry Transmitters.
Common causes: Common causes include Faulty Keyless Entry Transmitters, Faulty Body Control Module (BCM).
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 2,257

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 B3105 GMC Description

The Body Control Module (BCM) monitors the number of keyless entry transmitters programmed. Until at least one transmitter is programmed, the Body Control Module determines a malfunction condition exists. The Diagnostic Trouble Code (DTC) will be set when no keyless entry transmitter is programmed to the Body Control Module.

OBDII Code B3105 GMC - Keyless Entry Transmitters - AutoCodes.com — B3105 GMC Code - Keyless Entry Transmitters

What does this mean?

What are the Possible Causes of the DTC B3105 GMC?

Faulty Keyless Entry Transmitters
Faulty Body Control Module (BCM)

How to Fix the DTC B3105 GMC?

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 B3105 GMC 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 B3105 GMC code?

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Need Help with the Code?

Get the B3105 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B3105 2014 GMC Sierra — Keyless Entry Transmitters
B3105 2015 GMC Sierra — Keyless Entry Transmitters
B3105 2016 GMC Sierra — Keyless Entry Transmitters
B3105 2017 GMC Sierra — Keyless Entry Transmitters
B3105 2018 GMC Sierra — Keyless Entry Transmitters

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 B3105 GMC Code

1. What are the common symptoms of OBDII code B3105 GMC related to Keyless Entry Transmitters?

The common symptoms include non-responsive keyless entry system, inability to lock or unlock the vehicle remotely, and issues with the remote start function.

2. What are the possible causes of OBDII code B3105 GMC for Keyless Entry Transmitters?

Potential causes include faulty key fob batteries, damaged key fobs, issues with the receiver module, or problems with the vehicle's wiring or connections.

3. How can I troubleshoot OBDII code B3105 GMC for Keyless Entry Transmitters?

You can start by replacing the batteries in the key fobs, ensuring the key fobs are functioning properly, checking the receiver module for any damage, and inspecting the wiring and connections for any faults.

4. Can I reset OBDII code B3105 GMC related to Keyless Entry Transmitters myself?

Yes, you can try resetting the code by disconnecting the vehicle's battery for a few minutes and then reconnecting it. However, if the issue persists, further diagnosis may be required.

5. Are there any DIY repair tips for fixing OBDII code B3105 GMC for Keyless Entry Transmitters?

DIY repair tips include cleaning the key fob contacts, reprogramming the key fobs, checking for any loose wiring connections, and ensuring the receiver module is securely in place.

6. Is it safe to drive with OBDII code B3105 GMC related to Keyless Entry Transmitters?

It is generally safe to drive with this code, as it primarily affects the keyless entry system and does not impact the vehicle's drivability or safety. However, it is recommended to address the issue promptly.

7. How much does it typically cost to repair OBDII code B3105 GMC for Keyless Entry Transmitters?

The cost of repair can vary depending on the underlying cause of the issue. Simple fixes like replacing key fob batteries may be inexpensive, while more complex repairs involving the receiver module or wiring can be more costly.

8. Will OBDII code B3105 GMC for Keyless Entry Transmitters cause my vehicle to fail an emissions test?

No, this code is related to the keyless entry system and should not affect your vehicle's emissions or its ability to pass an emissions test.

9. Can extreme weather conditions affect OBDII code B3105 GMC for Keyless Entry Transmitters?

Yes, extreme weather conditions such as extreme cold or heat can impact the performance of key fobs and the keyless entry system, potentially triggering this OBDII code.

10. How can I prevent OBDII code B3105 GMC related to Keyless Entry Transmitters in the future?

To prevent this code from recurring, regularly check and replace key fob batteries, keep key fobs clean and well-maintained, and address any issues with the keyless entry system promptly to avoid further complications.