AutoCodes – Generic – B0687

B0687 Code - Security System Indicator Circuit Low

Quick Answer

The security indicator is controlled by the Body Control Module (BCM) based on commands from the immobilizer system or the Content Theft Deterrent (CTD) system. Common causes include Faulty Instrument Panel Cluster (IPC), Instrument Panel Cluster (IPC) harness is open or shorted, Instrument Panel Cluster (IPC) circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0687 indicates Security System Indicator Circuit Low.
Common causes: Common causes include Faulty Instrument Panel Cluster (IPC), Instrument Panel Cluster (IPC) harness is open or shorted, Instrument Panel Cluster (IPC) circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 2,966

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0687 Description

The security indicator is controlled by the Body Control Module (BCM) based on commands from the immobilizer system or the Content Theft Deterrent (CTD) system. With the ignition OFF, the security indicator is commanded by the CTD system. With the ignition ON, the security indicator is commanded by the immobilizer system. The security indicator is located in the Instrument Panel Cluster (IPC) and is supplied B+ at all times. When the immobilizer or CTD system requests the indicator be commanded ON, the BCM grounds the security indicator control circuit, illuminating the indicator.

OBDII Code B0687 - Security System Indicator Circuit Low - AutoCodes.com — B0687 Code - Security System Indicator Circuit Low

What does this mean?

What are the Possible Causes of the DTC B0687?

Faulty Instrument Panel Cluster (IPC)
Instrument Panel Cluster (IPC) harness is open or shorted
Instrument Panel Cluster (IPC) circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B0687?

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 B0687 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 B0687 code?

Need more information on how to fix the B0687 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0687 code diagnosed by a professional: Find a repair shop in your area

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

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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 $50â€“$100 for a simple bulb or wiring repair to $300â€“$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 youâ€™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.