Engine-Codes.com
Engine-Codes – GMC – B3140 2017 GMC Sierra

B3140 2017 GMC Sierra Code - Driver Door Unlock Switch Circuit

Quick Answer

The B3140 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the driver door unlock switch circuit. Common causes include Faulty driver door unlock switch, Wiring issues or loose connections in the circuit, BCM 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
B3140 2017 GMC Sierra indicates Driver Door Unlock Switch Circuit.
Common causes
Common causes include Faulty driver door unlock switch, Wiring issues or loose connections in the circuit, BCM 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 13, 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 B3140 2017 GMC Sierra Description

The B3140 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the driver door unlock switch circuit. This code indicates that there is a malfunction in the circuit that controls the driver's door unlock switch. The driver door unlock switch is an essential component of the vehicle's central locking system, allowing the driver to unlock the doors with the push of a button. When this circuit is faulty, it can lead to issues with unlocking the driver's door, which can affect the overall convenience and security of the vehicle.

OBDII Code B3140 2017 GMC Sierra - Driver Door Unlock Switch Circuit
B3140 2017 GMC Sierra Code - Driver Door Unlock Switch Circuit

Common Causes of B3140 2017 GMC Sierra

  1. Faulty driver door unlock switch.
  2. Wiring issues or loose connections in the circuit.
  3. BCM malfunction.
  4. Water or moisture damage to the circuit.
  5. Electrical short circuits in the wiring.

Symptoms of B3140 2017 GMC Sierra

  1. Inability to unlock the driver's door using the switch.
  2. Intermittent or erratic behavior of the central locking system.
  3. Check engine light illuminated on the dashboard.
  4. Audible clicking or buzzing noises from the door lock mechanism.
  5. Doors not locking or unlocking properly when using the switch.

How to Fix B3140 2017 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the DTC and pinpoint the exact problem.
  2. Inspect the driver door unlock switch for any visible damage or signs of wear. Replace the switch if necessary.
  3. Check the wiring and connections in the circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
  4. Test the BCM for proper functionality and replace if it is determined to be the cause of the issue.
  5. Clear the DTC from the vehicle's memory using the diagnostic scanner after completing the repairs.

Cost to Fix B3140 2017 GMC Sierra

The cost of repairing a B3140 DTC related to the driver door unlock switch circuit in a 2017 GMC Sierra can vary depending on the specific cause of the issue. On average, the parts for this repair, including a new driver door unlock switch or BCM, can range from $50 to $200. Labor costs at an auto repair shop typically range from $80 to $150 per hour. The total cost of the repair, including parts and labor, can range from $150 to $500 or more, depending on the extent of the repairs needed. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for B3140 2017 GMC Sierra









User Submitted Video

Need more information about the B3140 2017 GMC Sierra code?

Need more information on how to fix the B3140 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3140 2017 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 B3140 2017 GMC Sierra Code

1. What does OBDII code B3140 for a 2017 GMC Sierra indicate?

The B3140 code specifically refers to a malfunction in the driver door unlock switch circuit of the vehicle.

2. What are the common symptoms of a B3140 OBDII code in a 2017 GMC Sierra?

Common symptoms include issues with unlocking the driver door using the switch, malfunctioning interior lights, and potential problems with the central locking system.

3. What are the possible causes of the B3140 code in a 2017 GMC Sierra?

Potential causes include a faulty driver door unlock switch, damaged wiring or connectors in the circuit, a blown fuse, or a malfunctioning body control module.

4. How can I diagnose the driver door unlock switch circuit issue in my 2017 GMC Sierra?

You can start by checking the fuse related to the driver door circuit, inspecting the wiring and connectors for any visible damage, and testing the driver door unlock switch for proper functionality.

5. Can I repair the B3140 code issue in my 2017 GMC Sierra myself?

If you have experience working with automotive electrical systems, you may be able to repair the issue yourself by replacing the faulty switch, repairing damaged wiring, or addressing any other identified issues in the circuit.

6. Is it necessary to fix the B3140 code in my 2017 GMC Sierra immediately?

While the vehicle may still be operable with this code present, it is recommended to address the issue promptly to avoid potential inconvenience or safety concerns related to door unlocking functionality.

7. Will the B3140 code cause any long-term damage to my 2017 GMC Sierra?

Continued operation with the B3140 code unresolved may lead to further electrical issues or affect the overall functionality of the vehicle's door unlocking system.

8. Can a faulty driver door unlock switch impact other electrical components in my 2017 GMC Sierra?

Yes, a malfunctioning driver door unlock switch can potentially affect other related systems, such as interior lights, central locking, and even the overall operation of the vehicle's electrical system.

9. How much can I expect to pay for professional repair of the B3140 code in my 2017 GMC Sierra?

The cost of professional repair can vary depending on the specific cause of the issue, but it may involve diagnostic fees, parts replacement costs, and labor charges.

10. Is it possible for the B3140 code to reappear after repair in my 2017 GMC Sierra?

If the root cause of the issue is not effectively addressed during the repair, there is a possibility that the B3140 code may reappear. It is crucial to ensure thorough diagnosis and repair to prevent recurrence.

Discuss the causes and fixes for B3140 2017 GMC Sierra OBDII Code

Submit a New Comment

Code B3140 2017 GMC Sierra comments

No comments found for this page.