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B3873 2014 GMC Sierra Code - Front Washer Relay Circuit

Quick Answer

The B3873 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Front Washer Relay Circuit. Common causes include Faulty front washer relay, Wiring issues such as shorts or opens in the circuit, Defective washer pump. 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
B3873 2014 GMC Sierra indicates Front Washer Relay Circuit.
Common causes
Common causes include Faulty front washer relay, Wiring issues such as shorts or opens in the circuit, Defective washer pump.
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 16, 2024
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Code B3873 2014 GMC Sierra Description

The B3873 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Front Washer Relay Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the front windshield washer system. The front washer relay circuit is a crucial component of the vehicle's washer system, as it is responsible for activating the washer pump that sprays washer fluid onto the windshield to clean it while driving.

OBDII Code B3873 2014 GMC Sierra - Front Washer Relay Circuit
B3873 2014 GMC Sierra Code - Front Washer Relay Circuit

Common Causes of B3873 2014 GMC Sierra

  1. Faulty front washer relay.
  2. Wiring issues such as shorts or opens in the circuit.
  3. Defective washer pump.
  4. BCM malfunction.
  5. Corrosion or poor connections in the circuit.

Symptoms of B3873 2014 GMC Sierra

  1. Front windshield washer not spraying fluid.
  2. Washer pump not making any noise when washer switch is activated.
  3. Washer fluid not reaching the windshield.
  4. Washer fluid leaking from under the vehicle.

How to Fix B3873 2014 GMC Sierra

  1. Begin by inspecting the front washer relay and testing it for proper functionality. Replace the relay if it is found to be faulty.
  2. Check the wiring harness for any signs of damage, corrosion, or poor connections. Repair or replace any damaged wiring as needed.
  3. Test the washer pump to ensure it is working correctly. Replace the pump if it is not functioning.
  4. If the issue persists, diagnose the BCM for any faults related to the front washer relay circuit. Replace the BCM if necessary.
  5. Clear the DTC from the vehicle's memory using a diagnostic scan tool after completing the repairs.

Cost to Fix B3873 2014 GMC Sierra

The typical repair costs for addressing the B3873 DTC on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a front washer relay can cost between $50 to $100, while a new washer pump can range from $20 to $50. Labor costs at auto repair shops can vary between $80 and $150 per hour. It's advisable to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle.

What does this mean?

Tech Notes for B3873 2014 GMC Sierra

B3873:01 Front Washer Relay Circuit Short to Battery

B3873:02 Front Washer Relay Circuit Short to Ground

B3873:04 Front Washer Relay Circuit Open

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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 B3873 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B3873 in a 2014 GMC Sierra related to the Front Washer Relay Circuit?

The common symptoms include the front windshield washer system not working properly, failure of the washer pump to activate, or no washer fluid being sprayed onto the windshield.

2. What are the possible causes of OBDII code B3873 in a 2014 GMC Sierra?

Possible causes include a faulty front washer relay, a malfunctioning washer pump, damaged wiring or connectors in the front washer circuit, or a blown fuse related to the washer system.

3. How can I diagnose the Front Washer Relay Circuit issue triggering OBDII code B3873 in my 2014 GMC Sierra?

You can start by checking the washer fluid level, inspecting the washer pump for functionality, examining the wiring and connectors for any damage or corrosion, and testing the front washer relay for proper operation.

4. Can I temporarily fix the Front Washer Relay Circuit problem associated with OBDII code B3873 in my 2014 GMC Sierra?

If the issue is with a faulty relay or a blown fuse, you may be able to temporarily fix the problem by replacing the relay or fuse. However, it is recommended to address the root cause of the issue for a long-term solution.

5. Should I continue driving my 2014 GMC Sierra with OBDII code B3873 related to the Front Washer Relay Circuit issue?

It is generally safe to continue driving your vehicle with this code, but you should address the problem as soon as possible to ensure the proper functioning of your front washer system, especially in adverse weather conditions.

6. How much does it typically cost to repair the Front Washer Relay Circuit issue causing OBDII code B3873 in a 2014 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue. Simple fixes like replacing a relay or fuse may cost less, while more complex repairs involving the washer pump or wiring could be more expensive.

7. Can a DIY enthusiast with basic automotive knowledge fix the Front Washer Relay Circuit problem triggering OBDII code B3873 in a 2014 GMC Sierra?

Yes, if you have basic automotive knowledge and the necessary tools, you may be able to diagnose and fix simple issues like a faulty relay or blown fuse. However, more complex problems may require professional assistance.

8. Will resetting the OBDII system clear the B3873 code related to the Front Washer Relay Circuit in my 2014 GMC Sierra?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not fixed, the code is likely to reappear upon further diagnosis or vehicle operation.

9. Are there any preventive maintenance tips to avoid encountering OBDII code B3873 in a 2014 GMC Sierra?

Regularly checking and topping up washer fluid, ensuring the washer system components are in good condition, and addressing any issues promptly can help prevent the Front Washer Relay Circuit problem and associated OBDII code.

10. How important is it to address OBDII code B3873 concerning the Front Washer Relay Circuit in a 2014 GMC Sierra?

Addressing the code promptly is important to ensure the proper functioning of your front washer system, maintain visibility while driving, and prevent potential safety hazards due to impaired windshield washer operation.

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