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B3101 2017 GMC Sierra Code - Keyless Entry Data Link Circuit

Quick Answer

The B3101 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Keyless Entry Data Link Circuit. Common causes include Faulty key fob battery, Damaged wiring or connectors in the keyless entry system, ECM software malfunction. 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
B3101 2017 GMC Sierra indicates Keyless Entry Data Link Circuit.
Common causes
Common causes include Faulty key fob battery, Damaged wiring or connectors in the keyless entry system, ECM software malfunction.
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 17, 2024
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Code B3101 2017 GMC Sierra Description

The B3101 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Keyless Entry Data Link Circuit. This code indicates a problem with the communication link between the keyless entry system and the vehicle's electronic control module (ECM). The keyless entry system allows the driver to remotely lock and unlock the vehicle, as well as start the engine without physically inserting a key. The data link circuit is crucial for transmitting signals between the key fob and the vehicle's ECM.

OBDII Code B3101 2017 GMC Sierra - Keyless Entry Data Link Circuit
B3101 2017 GMC Sierra Code - Keyless Entry Data Link Circuit

Common Causes of B3101 2017 GMC Sierra

  1. Faulty key fob battery.
  2. Damaged wiring or connectors in the keyless entry system.
  3. ECM software malfunction.
  4. Water or moisture damage to keyless entry components.
  5. Faulty keyless entry receiver module.

Symptoms of B3101 2017 GMC Sierra

  1. Inability to lock or unlock the vehicle remotely using the key fob.
  2. Keyless entry system not responding to button presses on the key fob.
  3. Engine not starting remotely using the keyless entry system.
  4. Warning light illuminated on the dashboard related to the keyless entry system.

How to Fix B3101 2017 GMC Sierra

  1. Check the key fob battery and replace if necessary.
  2. Inspect wiring and connectors in the keyless entry system for damage and repair as needed.
  3. Perform a diagnostic scan to check for ECM software issues and reprogram if necessary.
  4. Inspect keyless entry components for water or moisture damage and replace any affected parts.
  5. Replace the keyless entry receiver module if it is found to be faulty.

Cost to Fix B3101 2017 GMC Sierra

The cost of repairing the Keyless Entry Data Link Circuit issue can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue is typically between $150 and $500. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Labor rates can vary based on location, vehicle make and model, and other factors, so it's advisable to inquire locally for a more precise cost 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 B3101 2017 GMC Sierra Code

1. What are common symptoms of OBDII code B3101 in a 2017 GMC Sierra related to the Keyless Entry Data Link Circuit?

The common symptoms include issues with the keyless entry system, such as the remote key fob not working or problems with door lock/unlock functions.

2. What are some possible causes of OBDII code B3101 in a 2017 GMC Sierra?

Possible causes of this code can include damaged wiring in the keyless entry system, a malfunctioning key fob, a faulty receiver module, or a problem with the Body Control Module (BCM).

3. How can I diagnose the Keyless Entry Data Link Circuit issue causing OBDII code B3101 in my 2017 GMC Sierra?

Diagnosing this issue may involve checking the wiring connections, inspecting the key fob for damage, testing the receiver module, and using a diagnostic scanner to communicate with the BCM for error codes.

4. Can OBDII code B3101 in a 2017 GMC Sierra be repaired without professional help?

Simple fixes like checking for loose connections or replacing a faulty key fob can sometimes resolve the issue. However, more complex repairs involving module replacements or BCM reprogramming may require professional assistance.

5. Are there any DIY tips for troubleshooting OBDII code B3101 related to the Keyless Entry Data Link Circuit in a 2017 GMC Sierra?

DIY tips may include checking the battery in the key fob, ensuring all relevant fuses are intact, inspecting wiring for visible damage, and resetting the BCM by disconnecting the battery for a few minutes.

6. How critical is it to address OBDII code B3101 in a 2017 GMC Sierra promptly?

While the vehicle may still be operable with this code present, addressing the issue promptly is recommended to prevent potential keyless entry system failures and ensure the vehicle's security features are functioning correctly.

7. Can OBDII code B3101 in a 2017 GMC Sierra cause any other related problems apart from keyless entry issues?

While the primary issue related to this code is usually keyless entry system malfunctions, it may also affect other vehicle functions tied to the BCM, such as interior lighting controls or alarm systems.

8. Is it safe to continue driving a 2017 GMC Sierra with OBDII code B3101 active?

Driving with this code active should not pose immediate safety risks, but it's advisable to address the underlying problem to avoid potential inconvenience or security concerns related to the keyless entry system.

9. How much can I expect to pay for repairing OBDII code B3101 in a 2017 GMC Sierra at a dealership or repair shop?

Costs for repairing this code can vary depending on the specific cause, but expect to pay for diagnostic time, parts replacement (if needed), and labor charges. Costs may range from a few hundred to over a thousand dollars.

10. Can resetting the BCM be a temporary solution for OBDII code B3101 in a 2017 GMC Sierra?

Resetting the BCM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It's recommended to diagnose and repair the root cause to prevent recurring problems.

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