B3806 2018 Chevrolet Silverado Code - High Beam and Headlamp Flash Select Circuit Malfunction
Quick Answer
The B3806 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a malfunction in the high beam and headlamp flash select circuit. Common causes include Faulty wiring or connectors in the high beam and headlamp flash circuit, Defective headlight switch, Malfunctioning control module. 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
- B3806 2018 Chevrolet Silverado indicates High Beam and Headlamp Flash Select Circuit Malfunction.
- Common causes
- Common causes include Faulty wiring or connectors in the high beam and headlamp flash circuit, Defective headlight switch, Malfunctioning control module.
- 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 B3806 2018 Chevrolet Silverado Description
The B3806 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a malfunction in the high beam and headlamp flash select circuit. This code is triggered when the vehicle's onboard computer detects an issue with the circuit responsible for controlling the high beam headlights and the headlamp flash feature. The high beam headlights provide increased visibility during nighttime driving or in low-light conditions, while the headlamp flash feature allows the driver to momentarily flash the high beams to signal other drivers.
Common Causes of B3806 2018 Chevrolet Silverado
- Faulty wiring or connectors in the high beam and headlamp flash circuit.
- Defective headlight switch.
- Malfunctioning control module.
- High beam relay failure.
- Electrical short circuits.
Symptoms of B3806 2018 Chevrolet Silverado
- High beam headlights not turning on.
- High beams staying on constantly.
- High beams flickering.
- Headlights not responding to headlamp flash feature.
- Headlights switching between high and low beams unexpectedly.
How to Fix B3806 2018 Chevrolet Silverado
- Begin by inspecting the wiring and connectors in the high beam and headlamp flash circuit for any signs of damage or corrosion. Repair or replace any damaged components.
- Test the headlight switch for proper functionality and replace it if necessary.
- Check the control module for faults using a diagnostic tool and replace it if deemed defective.
- Test the high beam relay and replace it if it is not functioning correctly.
- Clear the DTC from the vehicle's computer memory and test the high beam and headlamp flash functions to ensure they are operating as intended.
Cost to Fix B3806 2018 Chevrolet Silverado
The typical repair costs for addressing a high beam and headlamp flash select circuit malfunction can range from $150 to $400, 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, with hourly rates typically falling between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops often charge less. For a more accurate estimate, it is recommended to inquire with local auto repair shops.
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Frequently Asked Questions about B3806 2018 Chevrolet Silverado Code
1. What does the OBDII code B3806 mean on a 2018 Chevrolet Silverado?
B3806 refers to a malfunction in the High Beam and Headlamp Flash Select Circuit, indicating an issue with the high beam or headlamp flash system.
2. What are the common symptoms of the B3806 code in a 2018 Chevrolet Silverado?
Symptoms may include the high beams not activating, the headlamp flash feature not working, or a warning light on the dashboard.
3. What causes the B3806 code to appear on a 2018 Chevrolet Silverado?
Common causes include a faulty multifunction switch, damaged wiring or connectors in the high beam circuit, or a malfunctioning Body Control Module (BCM).
4. How do you diagnose the B3806 code on a 2018 Chevrolet Silverado?
Start by scanning the vehicle with an OBDII scanner, inspecting the multifunction switch, checking the wiring and connectors for corrosion or damage, and testing the BCM for faults.
5. Can a blown fuse trigger the B3806 code on a 2018 Chevrolet Silverado?
Yes, a blown fuse related to the high beam or headlamp circuit can cause the B3806 code to appear.
6. Is it safe to drive a 2018 Chevrolet Silverado with the B3806 code?
While it may be safe to drive during the day, the inability to use high beams or the headlamp flash feature can reduce visibility at night or in poor weather conditions.
7. How do you fix the B3806 code on a 2018 Chevrolet Silverado?
Repairs may include replacing the multifunction switch, repairing or replacing damaged wiring, or reprogramming or replacing the BCM if necessary.
8. How much does it typically cost to fix a B3806 code on a 2018 Chevrolet Silverado?
Costs can vary widely but may range from $100 to $500 depending on whether the issue is with the switch, wiring, or BCM.
9. Can a faulty BCM cause the B3806 code on a 2018 Chevrolet Silverado?
Yes, a malfunctioning Body Control Module (BCM) can fail to properly control the high beam circuit, triggering the code.
10. Can clearing the B3806 code fix the issue on a 2018 Chevrolet Silverado?
Clearing the code may temporarily remove it, but unless the underlying issue is resolved, the code will likely return.
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