B3873 Buick Code - Front Washer Relay Circuit
Quick Answer
The B3873 Buick code refers to an issue with the front washer relay circuit in the vehicle. Common causes include Faulty front washer relay, Blown fuse related to the washer system, Wiring issues such as a short circuit or open circuit. 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 Buick indicates Front Washer Relay Circuit.
- Common causes
- Common causes include Faulty front washer relay, Blown fuse related to the washer system, Wiring issues such as a short circuit or open circuit.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B3873 Buick Description
The B3873 Buick code refers to an issue with the front washer relay circuit in the vehicle. The front washer relay is a component that controls the operation of the windshield washer system, responsible for spraying washer fluid onto the windshield to clean it while driving. When this circuit malfunctions, it can lead to the windshield washer system not working properly, causing visibility issues and potentially compromising safety on the road.
Common Causes of B3873 Buick
- Faulty front washer relay.
- Blown fuse related to the washer system.
- Wiring issues such as a short circuit or open circuit.
- Defective washer pump.
- Corrosion or damage to electrical connections in the circuit.
Symptoms of B3873 Buick
- Windshield washer system not spraying fluid onto the windshield.
- No sound of the washer pump activating when the washer switch is turned on.
- Washer fluid not reaching the windshield despite hearing the pump running.
- Intermittent operation of the windshield washer system.
How to Fix B3873 Buick
- Start by checking the fuse related to the washer system and replacing it if necessary.
- Test the front washer relay for proper functionality and replace it if it is faulty.
- Inspect the wiring in the circuit for any signs of damage, corrosion, or loose connections, and repair or replace as needed.
- Test the washer pump to ensure it is working correctly, replacing it if it is defective.
- Once all components have been checked and any faulty parts replaced, test the windshield washer system to confirm that the issue has been resolved.
Cost to Fix B3873 Buick
The cost of repairing the front washer relay circuit can vary depending on the specific components that need to be replaced and the labor rates in your area. Generally, replacing a fuse or relay may cost between $20 to $50, while addressing wiring issues or replacing the washer pump can range from $50 to $200 or more. Including parts and labor, the total repair cost for this issue could be anywhere from $100 to $300 or higher. It is recommended to consult with a professional mechanic to get an accurate estimate based on your vehicle's make and model.
Tech Notes for B3873 Buick
B3873:02 Front Washer Relay Circuit Short to Ground
B3873:04 Front Washer Relay Circuit Open
Need more information about the B3873 Buick code?
Need more information on how to fix the B3873 Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3873 Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B3873 Buick Code
1. What does the OBDII code B3873 mean on a Buick?
The B3873 code indicates an issue with the front washer relay circuit, which controls the operation of the windshield washer system.
2. What are common symptoms of the B3873 code on a Buick?
Symptoms may include the windshield washer not spraying fluid, intermittent washer operation, or the washer pump being unresponsive.
3. What causes the B3873 code to appear?
Common causes include a faulty washer relay, damaged wiring or connectors in the washer circuit, a malfunctioning washer pump, or a blown fuse.
4. How do you diagnose the B3873 code on a Buick?
Diagnosis involves checking the washer relay, inspecting the wiring and connectors for damage or corrosion, testing the washer pump, and verifying the fuse is intact.
5. Can a faulty washer pump cause the B3873 code?
Yes, a malfunctioning washer pump can cause the code if it disrupts the circuit's normal operation.
6. How can I fix the B3873 code on my Buick?
Repairs may include replacing the washer relay, repairing damaged wiring or connectors, replacing the washer pump, or replacing a blown fuse.
7. Is the B3873 code a serious issue?
While it doesn’t affect the vehicle’s drivability, it can compromise visibility during adverse weather conditions, so it should be addressed promptly.
8. Can a blown fuse trigger the B3873 code?
Yes, if the fuse controlling the washer circuit blows, it can cause the code to appear.
9. How much does it cost to fix the B3873 code on a Buick?
Repairs can range from $50 to $200 depending on whether the issue is with the relay, wiring, pump, or fuse.
10. Can I clear the B3873 code without repairing the issue?
You can clear the code with an OBDII scanner, but it will likely return unless the underlying problem is resolved.
Discuss the causes and fixes for B3873 Buick OBDII Code
Code B3873 Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.