B3806 Cadillac 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 Cadillac 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 Cadillac Description
What are the Possible Causes of the DTC B3806 Cadillac?
- 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 Cadillac?
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 Cadillac 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.
Need more information about the B3806 Cadillac code?
Need more information on how to fix the B3806 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3806 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B3806 Cadillac Code
1. What are common symptoms of OBDII code B3806 in a Cadillac related to the High Beam and Headlamp Flash Select Circuit Malfunction?
- Common symptoms include non-functional high beams, inability to flash the headlights, and potentially a warning light on the dashboard.
2. What are the possible causes of OBDII code B3806 in a Cadillac?
- Possible causes include a faulty high beam/flash select switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.
3. How can I diagnose the High Beam and Headlamp Flash Select Circuit Malfunction in my Cadillac?
- Diagnose by checking the high beam switch operation, inspecting the wiring harness for damage, and using a diagnostic scanner to read the trouble code and identify the specific issue.
4. Can a DIY enthusiast repair OBDII code B3806 in a Cadillac?
- Yes, a DIY enthusiast can attempt to repair this issue by replacing the faulty switch, repairing damaged wiring, or resetting the control module if possible.
5. Is it safe to drive my Cadillac with the B3806 trouble code illuminated?
- It is generally safe to drive the vehicle, but it is recommended to address the issue promptly to ensure proper functionality of the high beams and flash select feature.
6. Are there any temporary solutions or workarounds for the High Beam and Headlamp Flash Select Circuit Malfunction in a Cadillac?
- One temporary solution could be manually adjusting the headlights for high beam operation until the issue is properly diagnosed and repaired.
7. How much does it typically cost to repair OBDII code B3806 in a Cadillac at a dealership or auto repair shop?
- Repair costs can vary depending on the specific cause of the issue, but they may range from $100 to $300 for parts and labor.
8. Can a bad headlight bulb cause the B3806 trouble code in a Cadillac?
- A bad headlight bulb is unlikely to cause this specific trouble code, as it is more related to the high beam and flash select circuitry.
9. Will resetting the trouble code make it go away permanently, or is it likely to return?
- Resetting the trouble code may make it disappear temporarily, but if the underlying issue is not addressed, the code is likely to return.
10. How long does it typically take to repair the High Beam and Headlamp Flash Select Circuit Malfunction in a Cadillac?
- The repair time can vary depending on the complexity of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.
Discuss the causes and fixes for B3806 Cadillac OBDII Code
Code B3806 Cadillac 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.
