B3806 2018 Chevrolet Silverado Code - High Beam and Headlamp Flash Select Circuit Malfunction
Quick Answer
When the turn signal/multifunction switch is momentarily placed in the flash-to-pass position, ground is applied to the Body Control Module (BCM) through the flash-to-pass signal circuit. Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction Switch 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
- B3806 2018 Chevrolet Silverado indicates High Beam and Headlamp Flash Select Circuit Malfunction.
- Common causes
- Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction Switch 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 B3806 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC B3806 2018 Chevrolet Silverado?
- Faulty Turn Signal/Multifunction Switch
- Turn Signal/Multifunction Switch harness is open or shorted
- Turn Signal/Multifunction Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3806 2018 Chevrolet Silverado?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3806 2018 Chevrolet Silverado 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 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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