B0687 Code - Security System Indicator Circuit Low
Quick Answer
The B0687 diagnostic trouble code (DTC) indicates that there is a low voltage condition in the security system indicator circuit. Common causes include Damaged wiring or connectors in the security system indicator circuit, Faulty security system indicator light, Malfunctioning security system 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
- B0687 indicates Security System Indicator Circuit Low.
- Common causes
- Common causes include Damaged wiring or connectors in the security system indicator circuit, Faulty security system indicator light, Malfunctioning security system 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 B0687 Description
The B0687 diagnostic trouble code (DTC) indicates that there is a low voltage condition in the security system indicator circuit. This code is typically found in vehicles equipped with an anti-theft system that includes a security indicator light on the dashboard. The security indicator light is designed to flash or stay illuminated to indicate that the vehicle's security system is armed and functioning properly. When the voltage in the security system indicator circuit is low, it can lead to issues with the proper operation of the security system, potentially compromising the vehicle's security.
Common Causes of B0687
- Damaged wiring or connectors in the security system indicator circuit
- Faulty security system indicator light
- Malfunctioning security system control module
- Low battery voltage affecting the security system indicator circuit
- Issues with the security system programming or configuration
Symptoms of B0687
- Security system indicator light not illuminating or flashing
- Inconsistent behavior of the security system indicator light
- Security system indicator light staying on continuously
- Security system not arming or disarming properly
- Alarm system not activating when the security system is breached
How to Fix B0687
- Begin by conducting a visual inspection of the wiring and connectors in the security system indicator circuit to check for any signs of damage or corrosion.
- Test the security system indicator light to determine if it is functioning correctly or needs to be replaced.
- Use a diagnostic scan tool to check for any fault codes stored in the security system control module and address any related issues.
- Verify the battery voltage to ensure it is within the proper range for the security system indicator circuit to operate effectively.
- If necessary, reprogram or recalibrate the security system to ensure proper functionality of the security system indicator.
Cost to Fix B0687
The typical repair costs for addressing a B0687 code can vary depending on the specific cause of the issue and the necessary repairs. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. It's important to note that these estimates are rough averages, and actual costs may vary based on factors such as the vehicle make and model, the location of the repair shop, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. It's recommended to obtain quotes from local repair shops to get a more accurate estimate for addressing a B0687 code.
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Code B0687 Information for Specific Makes
- B0687 Buick — Security System Indicator Circuit Low
- B0687 Cadillac — Security System Indicator Circuit Low
- B0687 Chevrolet — Security System Indicator Circuit Low
- B0687 GMC — Security System Indicator Circuit Low
- B0687 Hummer — Security System Indicator Circuit Low
- B0687 Pontiac — Security System Indicator Circuit Low
- B0687 Saturn — Security System Indicator Circuit Low
Frequently Asked Questions about B0687 Code
1. What does the OBDII code B0687 mean?
B0687 indicates that the security system indicator circuit is experiencing a low voltage condition, which may affect the operation of the vehicle's security features.
2. What are the common symptoms of a B0687 code?
Common symptoms include the security system light not illuminating or staying lit, failure of the security system to arm or disarm properly, and possible starting issues.
3. What causes the B0687 code to appear?
The code is typically caused by a faulty security system indicator bulb or LED, damaged wiring, a poor connection, or a malfunctioning body control module (BCM).
4. How can I diagnose a B0687 code?
Start by checking the security system indicator bulb or LED, inspect the wiring and connectors for damage or corrosion, and test the voltage at the circuit to ensure proper operation.
5. Can a B0687 code prevent my car from starting?
Yes, in some cases, this issue can interfere with the security system and prevent the vehicle from starting if the system believes there is a security breach.
6. How do I fix the B0687 code?
Repairs may include replacing a faulty bulb or LED, repairing or replacing damaged wiring, cleaning corroded connections, or reprogramming/repairing the BCM if necessary.
7. Is it safe to drive with a B0687 code?
While the car may still be drivable, ignoring the issue could compromise the vehicle's security system, and starting problems may arise over time.
8. How much does it cost to fix a B0687 code?
The cost depends on the root cause, ranging from $50–$100 for a simple bulb or wiring repair to $300–$800 if the BCM requires replacement or reprogramming.
9. Can a blown fuse cause a B0687 code?
Yes, a blown fuse in the security system circuit could lead to low voltage and trigger this code.
10. Do I need a professional to fix the B0687 code?
If you’re comfortable with basic electrical diagnostics and repairs, you might resolve it yourself. However, complex issues like BCM programming should be handled by a professional mechanic.
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