B3873 Buick Code - Front Washer Relay Circuit
Quick Answer
The windshield washer function is controlled by the Body Control Module (BCM). Common causes include Faulty Front Washer Relay, Front Washer Relay harness is open or shorted, Front Washer Relay circuit poor electrical connection. 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, Front Washer Relay harness is open or shorted, Front Washer Relay circuit poor electrical connection.
- 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.
Code B3873 Buick Description
What are the Possible Causes of the DTC B3873 Buick?
- Faulty Front Washer Relay
- Front Washer Relay harness is open or shorted
- Front Washer Relay circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3873 Buick?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B3873:02 Front Washer Relay Circuit Short to Ground
B3873:04 Front Washer Relay Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3873 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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
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