B3873 2017 GMC Sierra Code - Front Washer Relay Circuit
Quick Answer
The B3873 diagnostic trouble code (DTC) for the 2017 GMC Sierra relates to the front washer relay circuit. Common causes include Faulty front washer relay, Wiring issues or shorts 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 2017 GMC Sierra indicates Front Washer Relay Circuit.
- Common causes
- Common causes include Faulty front washer relay, Wiring issues or shorts 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.
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Code B3873 2017 GMC Sierra Description
The B3873 diagnostic trouble code (DTC) for the 2017 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 is a crucial component that activates the washer pump to spray washer fluid onto the windshield for cleaning. When this circuit malfunctions, it can lead to issues with the windshield washer system, affecting visibility and overall driving safety.
Common Causes of B3873 2017 GMC Sierra
- Faulty front washer relay.
- Wiring issues or shorts in the circuit.
- Defective washer pump.
- Corrosion or damage to electrical connectors.
- Issues with the washer fluid reservoir or tubing.
Symptoms of B3873 2017 GMC Sierra
- Windshield washer system not spraying fluid onto the windshield.
- No sound of the washer pump activating when the washer switch is pressed.
- Washer fluid not reaching the windshield when the system is activated.
- Dashboard warning light indicating a washer system malfunction.
How to Fix B3873 2017 GMC Sierra
- Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the trouble code and pinpoint the faulty component.
- Inspect the front washer relay and test its functionality. Replace the relay if it is found to be faulty.
- Check the wiring and connectors in the circuit for any damage or corrosion. Repair or replace as necessary.
- Test the washer pump to ensure it is working correctly. Replace the pump if it is malfunctioning.
- Refill the washer fluid reservoir and test the system to confirm that the issue has been resolved.
Cost to Fix B3873 2017 GMC Sierra
The cost of repairing the front washer relay circuit can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this type of issue can range from $100 to $300, including parts and labor. However, it is important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Additionally, the cost of parts such as the front washer relay or washer pump can also impact the overall repair cost. It is recommended to consult with a qualified mechanic or repair shop for a more accurate estimate based on the specific circumstances of the vehicle.
Tech Notes for B3873 2017 GMC Sierra
B3873:02 Front Washer Relay Circuit Short to Ground
B3873:04 Front Washer Relay Circuit Open
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Frequently Asked Questions about B3873 2017 GMC Sierra Code
Q: What does OBDII code B3873 mean on a 2017 GMC Sierra?
1. **A:** Code B3873 indicates an issue with the Front Washer Relay Circuit, which controls the operation of the windshield washer system. 2.
Q: What are common symptoms of the B3873 code on a 2017 GMC Sierra?
**A:** Symptoms may include the windshield washer system not working, the washer pump not activating, or a malfunction warning on the dashboard. 3.
Q: What causes the B3873 code to trigger on a 2017 GMC Sierra?
**A:** Common causes include a faulty front washer relay, damaged wiring or connectors in the washer circuit, or a malfunctioning body control module (BCM). 4.
Q: How can I diagnose the B3873 code on my 2017 GMC Sierra?
**A:** Start by inspecting the washer relay and its wiring for damage, check for proper voltage at the relay, and use a diagnostic scan tool to verify signals from the BCM. 5.
Q: Can a blown fuse cause the B3873 code on a 2017 GMC Sierra?
**A:** Yes, a blown fuse in the washer circuit can interrupt power to the relay and trigger the B3873 code. 6.
Q: How do I fix the B3873 code on a 2017 GMC Sierra?
**A:** Repairs may include replacing the front washer relay, repairing damaged wiring or connectors, or reprogramming or replacing the BCM if necessary. 7.
Q: Is it safe to drive with the B3873 code on a 2017 GMC Sierra?
**A:** While it may not affect drivability, a non-functioning washer system can reduce visibility in adverse weather, so the issue should be addressed promptly. 8.
Q: How much does it cost to repair the B3873 code on a 2017 GMC Sierra?
**A:** Costs can vary, but replacing a washer relay typically costs $10-$50 for parts, plus labor if done by a professional. Wiring or BCM repairs may be more expensive. 9.
Q: Can the B3873 code clear itself on a 2017 GMC Sierra?
**A:** The code may clear if the issue is intermittent and resolves on its own, but a permanent fix will likely require diagnosing and repairing the underlying cause. 10.
Q: What tools are needed to troubleshoot the B3873 code on a 2017 GMC Sierra?
**A:** Tools may include a digital multimeter, a diagnostic scan tool, and possibly wiring diagrams for the washer system circuit.
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