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B3873 Chevrolet Code - Front Washer Relay Circuit

Quick Answer

The B3873 Chevrolet code refers to an issue with the Front Washer Relay Circuit in the vehicle. Common causes include Damaged wiring or connectors in the front washer relay circuit, Faulty front washer relay, Malfunctioning front 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 Chevrolet indicates Front Washer Relay Circuit.
Common causes
Common causes include Damaged wiring or connectors in the front washer relay circuit, Faulty front washer relay, Malfunctioning front 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 15, 2024
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Code B3873 Chevrolet Description

The B3873 Chevrolet code refers to an issue with the Front Washer Relay Circuit in the vehicle. 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 crucial for activating the front windshield washer pump, which sprays washer fluid onto the windshield to clean it while driving. When this circuit malfunctions, it can lead to the front washer system not working properly, causing visibility issues and potential safety hazards.

OBDII Code B3873 Chevrolet - Front Washer Relay Circuit
B3873 Chevrolet Code - Front Washer Relay Circuit

Common Causes of B3873 Chevrolet

  1. Damaged wiring or connectors in the front washer relay circuit.
  2. Faulty front washer relay.
  3. Malfunctioning front washer pump.
  4. Problem with the control module.
  5. Low washer fluid level.

Symptoms of B3873 Chevrolet

  1. Front windshield washer system not spraying washer fluid.
  2. No sound of the front washer pump activating when the washer switch is pressed.
  3. Washer fluid leaking from the front washer system.
  4. Front washer system only working intermittently.
  5. Dashboard warning light indicating a washer system malfunction.

How to Fix B3873 Chevrolet

  1. Begin by checking the washer fluid level in the reservoir and topping it up if necessary.
  2. Inspect the wiring and connectors in the front washer relay circuit for any damage or corrosion. Repair or replace as needed.
  3. Test the front washer relay and replace it if it is found to be faulty.
  4. Check the front washer pump for proper operation and replace if necessary.
  5. If the issue persists, diagnose the control module for any faults and replace if required.

Cost to Fix B3873 Chevrolet

The typical repair costs for addressing the B3873 Chevrolet code can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable prices.

What does this mean?

Tech Notes for B3873 Chevrolet

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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Information for Specific Chevrolet Models

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 Chevrolet Code

1. What are common symptoms of OBDII code B3873 (Chevrolet) related to the Front Washer Relay Circuit?

- Common symptoms include inoperative front windshield washer fluid spraying, no sound from the washer pump, or the washer pump working intermittently.

2. What are the possible causes of OBDII code B3873 (Chevrolet) indicating an issue with the Front Washer Relay Circuit?

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

3. How can I diagnose the Front Washer Relay Circuit issue triggering OBDII code B3873 (Chevrolet)?

- Diagnosis involves checking the front washer relay for proper function, inspecting the wiring and connectors for any damage or corrosion, testing the washer pump for operation, and ensuring the fuse for the washer system is intact.

4. Can a DIY enthusiast repair OBDII code B3873 (Chevrolet) linked to the Front Washer Relay Circuit?

- Yes, DIY enthusiasts can attempt to repair this issue by replacing the front washer relay, repairing damaged wiring or connectors, testing and replacing the washer pump if necessary, and replacing any blown fuses.

5. How important is it to address OBDII code B3873 (Chevrolet) related to the Front Washer Relay Circuit promptly?

- It is important to address this issue promptly as a malfunctioning front washer system can compromise visibility while driving, especially in adverse weather conditions.

6. Are there any specific tools required to diagnose and repair OBDII code B3873 (Chevrolet) associated with the Front Washer Relay Circuit?

- Basic tools such as a multimeter, wiring diagram for the washer system, replacement front washer relay, and basic hand tools may be required to diagnose and repair this issue.

7. What are some preventive maintenance tips to avoid encountering OBDII code B3873 (Chevrolet) due to Front Washer Relay Circuit problems?

- Regularly checking and topping up windshield washer fluid, ensuring proper operation of the washer system during routine vehicle inspections, and addressing any washer system issues promptly can help prevent this code from appearing.

8. Can extreme weather conditions impact the Front Washer Relay Circuit and trigger OBDII code B3873 (Chevrolet)?

- Yes, extreme cold or hot weather conditions can affect the operation of the front washer system components, potentially leading to issues with the Front Washer Relay Circuit and triggering the OBDII code B3873.

9. Is it safe to continue driving with OBDII code B3873 (Chevrolet) indicating a problem with the Front Washer Relay Circuit?

- It is not recommended to continue driving with this issue unresolved, as it can impact visibility and compromise safe driving conditions, especially in situations requiring the use of the front washer system.

10. How much can a typical repair for OBDII code B3873 (Chevrolet) related to the Front Washer Relay Circuit cost?

- The cost of repair can vary depending on the root cause of the issue, but it may range from $50 to $200 for parts and labor, excluding diagnostic fees.

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